Highly Modified 03 Cobra. What oil to use?!
- Thread starter DannyB
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Red Line 5W-30 (3.8 HTHS), Red Line 0W-40 (4.0 HTHS), or Mobil 1 0W-40 (3.8 HTHS).
I'd lean towards RL 0W-40 personally, high ZDDP content, high organic moly content (950 ppm), and IME more than sufficient HTHS viscosity.
I tend to believe any of the above oils will serve you well, BUT your 630 rwhp even makes the Mercedes Benz S65 AMG (twin turbo V12 @ 604 HP, ~530 to the wheels) look tame by comparison, and that's the highest HP car I can think of that is M1 0W-40 OEM approved. I don't believe that suggests M1 0W-40 isn't up to the task, that was just my first thought when the factory approvals were mentioned.
I'd lean towards RL 0W-40 personally, high ZDDP content, high organic moly content (950 ppm), and IME more than sufficient HTHS viscosity.
I tend to believe any of the above oils will serve you well, BUT your 630 rwhp even makes the Mercedes Benz S65 AMG (twin turbo V12 @ 604 HP, ~530 to the wheels) look tame by comparison, and that's the highest HP car I can think of that is M1 0W-40 OEM approved. I don't believe that suggests M1 0W-40 isn't up to the task, that was just my first thought when the factory approvals were mentioned.
Good thoughts. The car is getting a smaller pully, and water-meth very soon. Fully expecting over 700. Realistically 750. So a good oil with the best properties is a MUST. My last cobra saw 3000 miles in about years time. So price on oil, really doesn't matter with that OCI.
I am still leaning toward the m1 0w40, and perhaps the red-line assuming I can find it locally.
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There`s also Royal Purple XPR.
Ah-hah! A true hot rodder that lives by the creed:
"If some power is good, more is better, and too much is just about right."
If you're going to boost the engine even further, that makes a stronger case for Redline oil. The M1 0w40 is an excellent oil, but for supercharged engines, I think RL is the way to go.
"If some power is good, more is better, and too much is just about right."
If you're going to boost the engine even further, that makes a stronger case for Redline oil. The M1 0w40 is an excellent oil, but for supercharged engines, I think RL is the way to go.
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Ny suggestion would be to poll mustang oriented sites.
www.svtperformance.com would be the first one you should go to. You will be abkle to find info from people who deal with this motor on a daily basis and know much more about it.
Find out who built the motor. What type of tolerances did they put in it? What would they suggest you use?
If that engine was put together with tight tolerances that 15w40 could be thick enough to possibly cause issues on start up.
www.svtperformance.com would be the first one you should go to. You will be abkle to find info from people who deal with this motor on a daily basis and know much more about it.
Find out who built the motor. What type of tolerances did they put in it? What would they suggest you use?
If that engine was put together with tight tolerances that 15w40 could be thick enough to possibly cause issues on start up.
aquariuscsm said:
Originally Posted By: AdRock
Ny suggestion would be to poll mustang oriented sites.
www.svtperformance.com would be the first one you should go to. You will be abkle to find info from people who deal with this motor on a daily basis and know much more about it.
Find out who built the motor. What type of tolerances did they put in it? What would they suggest you use?
If that engine was put together with tight tolerances that 15w40 could be thick enough to possibly cause issues on start up.
I would hope the builder kept the tolerences at the absolute minimum but I am sure you are talking about clearances. How could 15w-40 be a problem upon startup unless the temps are below freezing?
Ny suggestion would be to poll mustang oriented sites.
www.svtperformance.com would be the first one you should go to. You will be abkle to find info from people who deal with this motor on a daily basis and know much more about it.
Find out who built the motor. What type of tolerances did they put in it? What would they suggest you use?
If that engine was put together with tight tolerances that 15w40 could be thick enough to possibly cause issues on start up.
I would hope the builder kept the tolerences at the absolute minimum but I am sure you are talking about clearances. How could 15w-40 be a problem upon startup unless the temps are below freezing?
Originally Posted By: DannyB
Well...Ive done my due diligence, as much as possible. Searched, called, and searched some more. So now Im asking the experts.
Being new to "understanding oil" the way most of you do, I just need a little push in the right direction.
I have read sooo many threads of: "modular motors have to tight a tolerances to take anything over 5w20" to, "I personally run a 40 weight oil and its fine."
I know Ford recommends 5w20, but the ausie versions are specked with 5w30. Pretty sure this was just for CAFE reasons.
Regardless, here is the info on my car, what is currently in it, and what Im thinking of running from the info I could find?...
2003 Ford Cobra
5.1 Stroker
2.8 Kenne Bell
36k on car
Approx. 10k miles on motor
Makes 630hp on low boost/pump gas. Conservative tune.
I do "baby" the car, but enjoy the spirited driving every so often....how can you not with that power on tap?
CURRENTLY has 15w40 Rotella T. (Recommended by unknown shop. Was told this by previous owner. Motor was not built by me)
Now, I live in Oklahoma and the temps are pretty warm. Car wont get driven alot when the temps are in the 20-40* range.
On Start-up in the mornings it idles at 90-100 lbs of pressure. Maybe I'm old-school, but that seems HIGH. When fully warmed it idles at ~40. Cruising speed ~60lbs.
I dont know the additives package in the M1 0w40 (couldnt find it), but that is what I was leaning towards, simply based of some others in the same mod/hp range running the same.
Really looking for some good technical info as to whats better for my application, rather then "well this is what I run, and its great". But, If you have a similar car/mods, please do share what you run!
Thanks in advance!!
I have readily available access to (amsoil, RP, and most brands carried by typical part stores)
The oil pressure is fine what matters is the oil pressure when it is hot ,no wot till the oil is hot. The engine is now high performance. 5W-20 is for CAFE and you motor is not Ford stock. 15w-40 motor oils are really good oils probably as good as there is. Modular motors have tight clearances.Tolerances are the allowed variation of the recommended clearances [for example .0025+- 00005, I made up the numbers] Be careful of the opinions of readers only, as compared to those who know. A home work project for you what oil visc is recommended by the supercharged Mustang sold by Ford dealers. I do not remember what it was called but I looked at one when I bought my daughter her Focus and the check book was burning a hole in my pocket and the dealer was dealing. But I spent my money on something else.
Well...Ive done my due diligence, as much as possible. Searched, called, and searched some more. So now Im asking the experts.
Being new to "understanding oil" the way most of you do, I just need a little push in the right direction.
I have read sooo many threads of: "modular motors have to tight a tolerances to take anything over 5w20" to, "I personally run a 40 weight oil and its fine."
I know Ford recommends 5w20, but the ausie versions are specked with 5w30. Pretty sure this was just for CAFE reasons.
Regardless, here is the info on my car, what is currently in it, and what Im thinking of running from the info I could find?...
2003 Ford Cobra
5.1 Stroker
2.8 Kenne Bell
36k on car
Approx. 10k miles on motor
Makes 630hp on low boost/pump gas. Conservative tune.
I do "baby" the car, but enjoy the spirited driving every so often....how can you not with that power on tap?
CURRENTLY has 15w40 Rotella T. (Recommended by unknown shop. Was told this by previous owner. Motor was not built by me)
Now, I live in Oklahoma and the temps are pretty warm. Car wont get driven alot when the temps are in the 20-40* range.
On Start-up in the mornings it idles at 90-100 lbs of pressure. Maybe I'm old-school, but that seems HIGH. When fully warmed it idles at ~40. Cruising speed ~60lbs.
I dont know the additives package in the M1 0w40 (couldnt find it), but that is what I was leaning towards, simply based of some others in the same mod/hp range running the same.
Really looking for some good technical info as to whats better for my application, rather then "well this is what I run, and its great". But, If you have a similar car/mods, please do share what you run!
Thanks in advance!!
I have readily available access to (amsoil, RP, and most brands carried by typical part stores)
The oil pressure is fine what matters is the oil pressure when it is hot ,no wot till the oil is hot. The engine is now high performance. 5W-20 is for CAFE and you motor is not Ford stock. 15w-40 motor oils are really good oils probably as good as there is. Modular motors have tight clearances.Tolerances are the allowed variation of the recommended clearances [for example .0025+- 00005, I made up the numbers] Be careful of the opinions of readers only, as compared to those who know. A home work project for you what oil visc is recommended by the supercharged Mustang sold by Ford dealers. I do not remember what it was called but I looked at one when I bought my daughter her Focus and the check book was burning a hole in my pocket and the dealer was dealing. But I spent my money on something else.
I forgot to add the engine doesn't put out 630 HP all the time.
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Originally Posted By: Steve S
Originally Posted By: DannyB
Well...Ive done my due diligence, as much as possible. Searched, called, and searched some more. So now Im asking the experts.
Being new to "understanding oil" the way most of you do, I just need a little push in the right direction.
I have read sooo many threads of: "modular motors have to tight a tolerances to take anything over 5w20" to, "I personally run a 40 weight oil and its fine."
I know Ford recommends 5w20, but the ausie versions are specked with 5w30. Pretty sure this was just for CAFE reasons.
Regardless, here is the info on my car, what is currently in it, and what Im thinking of running from the info I could find?...
2003 Ford Cobra
5.1 Stroker
2.8 Kenne Bell
36k on car
Approx. 10k miles on motor
Makes 630hp on low boost/pump gas. Conservative tune.
I do "baby" the car, but enjoy the spirited driving every so often....how can you not with that power on tap?
CURRENTLY has 15w40 Rotella T. (Recommended by unknown shop. Was told this by previous owner. Motor was not built by me)
Now, I live in Oklahoma and the temps are pretty warm. Car wont get driven alot when the temps are in the 20-40* range.
On Start-up in the mornings it idles at 90-100 lbs of pressure. Maybe I'm old-school, but that seems HIGH. When fully warmed it idles at ~40. Cruising speed ~60lbs.
I dont know the additives package in the M1 0w40 (couldnt find it), but that is what I was leaning towards, simply based of some others in the same mod/hp range running the same.
Really looking for some good technical info as to whats better for my application, rather then "well this is what I run, and its great". But, If you have a similar car/mods, please do share what you run!
Thanks in advance!!
I have readily available access to (amsoil, RP, and most brands carried by typical part stores)
The oil pressure is fine what matters is the oil pressure when it is hot ,no wot till the oil is hot. The engine is now high performance. 5W-20 is for CAFE and you motor is not Ford stock. 15w-40 motor oils are really good oils probably as good as there is. Modular motors have tight clearances.Tolerances are the allowed variation of the recommended clearances [for example .0025+- 00005, I made up the numbers] Be careful of the opinions of readers only, as compared to those who know. A home work project for you what oil visc is recommended by the supercharged Mustang sold by Ford dealers. I do not remember what it was called but I looked at one when I bought my daughter her Focus and the check book was burning a hole in my pocket and the dealer was dealing. But I spent my money on something else.
The Shelby and the Ford GT both spec 5w50. I think those are the ones you are talking about? It shears to a 40 (convenient
) of course.
Originally Posted By: DannyB
Well...Ive done my due diligence, as much as possible. Searched, called, and searched some more. So now Im asking the experts.
Being new to "understanding oil" the way most of you do, I just need a little push in the right direction.
I have read sooo many threads of: "modular motors have to tight a tolerances to take anything over 5w20" to, "I personally run a 40 weight oil and its fine."
I know Ford recommends 5w20, but the ausie versions are specked with 5w30. Pretty sure this was just for CAFE reasons.
Regardless, here is the info on my car, what is currently in it, and what Im thinking of running from the info I could find?...
2003 Ford Cobra
5.1 Stroker
2.8 Kenne Bell
36k on car
Approx. 10k miles on motor
Makes 630hp on low boost/pump gas. Conservative tune.
I do "baby" the car, but enjoy the spirited driving every so often....how can you not with that power on tap?
CURRENTLY has 15w40 Rotella T. (Recommended by unknown shop. Was told this by previous owner. Motor was not built by me)
Now, I live in Oklahoma and the temps are pretty warm. Car wont get driven alot when the temps are in the 20-40* range.
On Start-up in the mornings it idles at 90-100 lbs of pressure. Maybe I'm old-school, but that seems HIGH. When fully warmed it idles at ~40. Cruising speed ~60lbs.
I dont know the additives package in the M1 0w40 (couldnt find it), but that is what I was leaning towards, simply based of some others in the same mod/hp range running the same.
Really looking for some good technical info as to whats better for my application, rather then "well this is what I run, and its great". But, If you have a similar car/mods, please do share what you run!
Thanks in advance!!
I have readily available access to (amsoil, RP, and most brands carried by typical part stores)
The oil pressure is fine what matters is the oil pressure when it is hot ,no wot till the oil is hot. The engine is now high performance. 5W-20 is for CAFE and you motor is not Ford stock. 15w-40 motor oils are really good oils probably as good as there is. Modular motors have tight clearances.Tolerances are the allowed variation of the recommended clearances [for example .0025+- 00005, I made up the numbers] Be careful of the opinions of readers only, as compared to those who know. A home work project for you what oil visc is recommended by the supercharged Mustang sold by Ford dealers. I do not remember what it was called but I looked at one when I bought my daughter her Focus and the check book was burning a hole in my pocket and the dealer was dealing. But I spent my money on something else.
The Shelby and the Ford GT both spec 5w50. I think those are the ones you are talking about? It shears to a 40 (convenient
Redline would be my pick also, Im friend with few guys that own heavy mod car 1000 hp supra running red line on everything in this car, oil, gear oil, tranny, coolant, he trust NAPA GOLD oil filter. the owner that build the car for him, run everything redline also.
Last edited:
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Originally Posted By: MetalSlug
Redline would be my pick also, Im friend with few guys that own heavy mod car 1000 hp supra running red line on everything in this car, oil, gear oil, tranny, coolant, he trust NAPA GOLD oil filter. the owner that build the car for him, run everything redline also.
The 620HP $245,000 Porsche 911 GT2 RS (and it has a warranty!) spec's M1 0w40.
And that's out of a "little" 3.6L 6-cylinder (not unlike the Supra).
Redline would be my pick also, Im friend with few guys that own heavy mod car 1000 hp supra running red line on everything in this car, oil, gear oil, tranny, coolant, he trust NAPA GOLD oil filter. the owner that build the car for him, run everything redline also.
The 620HP $245,000 Porsche 911 GT2 RS (and it has a warranty!) spec's M1 0w40.
And that's out of a "little" 3.6L 6-cylinder (not unlike the Supra).
Originally Posted By: SteveSRT8
We run Amsoil Dominator in a huge big block blower motor in a go-fast boat.
It has a great reputation and is really the "good stuff" for a real racing engine.
Unless that engine is really set up loose I can't see why you need such thick oil.
You can hold WOT on that boat for as long as the water allows.
We run Amsoil Dominator in a huge big block blower motor in a go-fast boat.
It has a great reputation and is really the "good stuff" for a real racing engine.
Unless that engine is really set up loose I can't see why you need such thick oil.
You can hold WOT on that boat for as long as the water allows.
Originally Posted By: OVERK1LL
Originally Posted By: MetalSlug
Redline would be my pick also, Im friend with few guys that own heavy mod car 1000 hp supra running red line on everything in this car, oil, gear oil, tranny, coolant, he trust NAPA GOLD oil filter. the owner that build the car for him, run everything redline also.
The 620HP $245,000 Porsche 911 GT2 RS (and it has a warranty!) spec's M1 0w40.
And that's out of a "little" 3.6L 6-cylinder (not unlike the Supra).
and that out a little 3.0L 6 cylinder 1000 hp supra
but every one oil choice is different, I like use castrol product for every day daily drive cars, and redline product for high horse power and tranny and rear end.
Originally Posted By: MetalSlug
Redline would be my pick also, Im friend with few guys that own heavy mod car 1000 hp supra running red line on everything in this car, oil, gear oil, tranny, coolant, he trust NAPA GOLD oil filter. the owner that build the car for him, run everything redline also.
The 620HP $245,000 Porsche 911 GT2 RS (and it has a warranty!) spec's M1 0w40.
And that's out of a "little" 3.6L 6-cylinder (not unlike the Supra).
and that out a little 3.0L 6 cylinder 1000 hp supra
but every one oil choice is different, I like use castrol product for every day daily drive cars, and redline product for high horse power and tranny and rear end.
Last edited:
OVERKILL
$100 Site Donor 2021
Originally Posted By: MetalSlug
Originally Posted By: OVERK1LL
Originally Posted By: MetalSlug
Redline would be my pick also, Im friend with few guys that own heavy mod car 1000 hp supra running red line on everything in this car, oil, gear oil, tranny, coolant, he trust NAPA GOLD oil filter. the owner that build the car for him, run everything redline also.
The 620HP $245,000 Porsche 911 GT2 RS (and it has a warranty!) spec's M1 0w40.
And that's out of a "little" 3.6L 6-cylinder (not unlike the Supra).
and that out a little 3.0L 6 cylinder 1000 hp supra
but every one oil choice is different, I like use castrol product for every day daily drive cars, and redline product for high horse power and tranny and rear end.
That's why I said "not unlike the Supra"; I was drawing a parallel there.
The Porsche of course has a warranty, as do all the other high performance cars that ship with M1 0w40 in them. It is definitely a race-bred oil with quite an impressive resume. There is no denying that.
Originally Posted By: OVERK1LL
Originally Posted By: MetalSlug
Redline would be my pick also, Im friend with few guys that own heavy mod car 1000 hp supra running red line on everything in this car, oil, gear oil, tranny, coolant, he trust NAPA GOLD oil filter. the owner that build the car for him, run everything redline also.
The 620HP $245,000 Porsche 911 GT2 RS (and it has a warranty!) spec's M1 0w40.
And that's out of a "little" 3.6L 6-cylinder (not unlike the Supra).
and that out a little 3.0L 6 cylinder 1000 hp supra
but every one oil choice is different, I like use castrol product for every day daily drive cars, and redline product for high horse power and tranny and rear end.
That's why I said "not unlike the Supra"; I was drawing a parallel there.
The Porsche of course has a warranty, as do all the other high performance cars that ship with M1 0w40 in them. It is definitely a race-bred oil with quite an impressive resume. There is no denying that.
Originally Posted By: OVERK1LL
Originally Posted By: MetalSlug
Originally Posted By: OVERK1LL
Originally Posted By: MetalSlug
Redline would be my pick also, Im friend with few guys that own heavy mod car 1000 hp supra running red line on everything in this car, oil, gear oil, tranny, coolant, he trust NAPA GOLD oil filter. the owner that build the car for him, run everything redline also.
The 620HP $245,000 Porsche 911 GT2 RS (and it has a warranty!) spec's M1 0w40.
And that's out of a "little" 3.6L 6-cylinder (not unlike the Supra).
and that out a little 3.0L 6 cylinder 1000 hp supra
but every one oil choice is different, I like use castrol product for every day daily drive cars, and redline product for high horse power and tranny and rear end.
That's why I said "not unlike the Supra"; I was drawing a parallel there.
The Porsche of course has a warranty, as do all the other high performance cars that ship with M1 0w40 in them. It is definitely a race-bred oil with quite an impressive resume. There is no denying that.
yub stick with mobil 1 for warranty. M1 0w40 is superior oil
Originally Posted By: MetalSlug
Originally Posted By: OVERK1LL
Originally Posted By: MetalSlug
Redline would be my pick also, Im friend with few guys that own heavy mod car 1000 hp supra running red line on everything in this car, oil, gear oil, tranny, coolant, he trust NAPA GOLD oil filter. the owner that build the car for him, run everything redline also.
The 620HP $245,000 Porsche 911 GT2 RS (and it has a warranty!) spec's M1 0w40.
And that's out of a "little" 3.6L 6-cylinder (not unlike the Supra).
and that out a little 3.0L 6 cylinder 1000 hp supra
but every one oil choice is different, I like use castrol product for every day daily drive cars, and redline product for high horse power and tranny and rear end.
That's why I said "not unlike the Supra"; I was drawing a parallel there.
The Porsche of course has a warranty, as do all the other high performance cars that ship with M1 0w40 in them. It is definitely a race-bred oil with quite an impressive resume. There is no denying that.
yub stick with mobil 1 for warranty. M1 0w40 is superior oil
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