does anyone run diesel oil in the gas engines ? my brother just had an engine rebuilt and the guy said to run diesel oil in it. why ? there are plenty of good motor oils out there.
diesel oil vs. regular motor oil
- Thread starter hardheaded
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For the ZDDP
I use diesel oil (rotella t6) in a prius and will be using it in all my vehicles here soon.
My dad uses DELO 400 SAE 30 in his older 50's Dodge truck and DELO 10w30 XLE in his 02' and 01' Dakota pickups without issue
I think any newer CK-4/SN (dual rated for diesel and gas) oil won't have as much of an advantage over a good quality gasoline engine oil.
This is just based on what I have seen from VOAs for the recent CK-4 oils that also carry a SN rating. The ZDDP levels have dropped.
Example: http://pqiadata.org/Chevron_Delo_15W40_4192017.html
This is just based on what I have seen from VOAs for the recent CK-4 oils that also carry a SN rating. The ZDDP levels have dropped.
Example: http://pqiadata.org/Chevron_Delo_15W40_4192017.html
There is so much a VOA will never show also
Say you are comparing a 15w40 HDEO or Mixed fleet diesel oil, with a 10W-40 conventional passenger car oil.
The 15w40 "diesel" oil wins in a lot of things:
It will have stouter base stocks.
HTHS Viscosity is pretty much guaranteed to be higher ( viscosity at 300F )
They pretty much always have hig levels of ZDDP which is an additive used to prevent camshaft wear on old flat tappet engines.
It will probably have a Higher Total Base Number, which is the oil's ability to fight off acids.
It will probably have more detergents and dispersants which will keep the engine clean.
They require less Viscosity index improvers, which means the oil will maintain its viscosity for longer, and also VIIs create deposits when destroyed and form deposits inside the engine.
It will probably even be cheaper than a 10W-40 Passenger car oil!
Keep in mind oil companies have in mind that a 15w40 HDEO will be used in equipment that is worth sometimes hundreds of thousands of dollars, they cannot afford to have an engine failure caused by one of their oils, so they put a lot of effort into designing these oils.
The 15w40 "diesel" oil wins in a lot of things:
It will have stouter base stocks.
HTHS Viscosity is pretty much guaranteed to be higher ( viscosity at 300F )
They pretty much always have hig levels of ZDDP which is an additive used to prevent camshaft wear on old flat tappet engines.
It will probably have a Higher Total Base Number, which is the oil's ability to fight off acids.
It will probably have more detergents and dispersants which will keep the engine clean.
They require less Viscosity index improvers, which means the oil will maintain its viscosity for longer, and also VIIs create deposits when destroyed and form deposits inside the engine.
It will probably even be cheaper than a 10W-40 Passenger car oil!
Keep in mind oil companies have in mind that a 15w40 HDEO will be used in equipment that is worth sometimes hundreds of thousands of dollars, they cannot afford to have an engine failure caused by one of their oils, so they put a lot of effort into designing these oils.
If you give us more details about the car/engine in question we might be able to give some advice on what oil to use.
I run it in everything. My wifes 08 ford edge has 195,000 miles and the oil is just as clean at 5,000 miles as it is when new. Only looses 1/2 pint in 5,000 miles also. I use it in my 13 Harley also. Even the manual says if their oil in not available to use 15w40 HDEO oil. Follow the money on syn and thin oils. It was not done for the consumer.
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Bud_One
Site Donor 2025
Ran some Delo 10W30 XLE in my Accord for 6k miles .
Ran great.
Ran great.
I've got dual rated HDEOs in two cars ATM and have used these oils in other gassers in the past.
I've never UOAed a run of HDEO but these oils seem to hold up well and to minimize consumption.
These are thick oils regardless of SAE grade since they typically have HTHS viscosity >3.5. This may have a noticeable impact on fuel economy relative to a PCMO or may not.
My experience has been mixed in that regard.
These are stout oils that meet serious and well defined standards, unlike typical PCMOs as sold here.
I'd use one in almost anything and they're often available quite cheaply.
You want a 5W-40 dual rated HDEO? Twelve bucks a gallon MIR on D1 through the end of May. With store deals and the MIR, I can get this oil for as little as $1.60/qt. So can many others.
Price and value seem to favor dual rated HDEOs, although I'm not sure that such oils would be appropriate to our 0W-20 Honda. OTOH, some might be, like the 0W-40 Rotella SB.
I've never UOAed a run of HDEO but these oils seem to hold up well and to minimize consumption.
These are thick oils regardless of SAE grade since they typically have HTHS viscosity >3.5. This may have a noticeable impact on fuel economy relative to a PCMO or may not.
My experience has been mixed in that regard.
These are stout oils that meet serious and well defined standards, unlike typical PCMOs as sold here.
I'd use one in almost anything and they're often available quite cheaply.
You want a 5W-40 dual rated HDEO? Twelve bucks a gallon MIR on D1 through the end of May. With store deals and the MIR, I can get this oil for as little as $1.60/qt. So can many others.
Price and value seem to favor dual rated HDEOs, although I'm not sure that such oils would be appropriate to our 0W-20 Honda. OTOH, some might be, like the 0W-40 Rotella SB.
Originally Posted By: Bud_One
Ran some Delo 10W30 XLE in my Accord for 6k miles .
Ran great.
Why you stop? I'm putting DELO XLE 10w30 soon with a MC FL-910S
Ran some Delo 10W30 XLE in my Accord for 6k miles .
Ran great.
Why you stop? I'm putting DELO XLE 10w30 soon with a MC FL-910S
Bud_One
Site Donor 2025
Originally Posted By: car51
Originally Posted By: Bud_One
Ran some Delo 10W30 XLE in my Accord for 6k miles .
Ran great.
Why you stop? I'm putting DELO XLE 10w30 soon with a MC FL-910S
I have to kill some of my oil in my stash.
And I'm waiting on it to go on sale like last time.
Originally Posted By: Bud_One
Ran some Delo 10W30 XLE in my Accord for 6k miles .
Ran great.
Why you stop? I'm putting DELO XLE 10w30 soon with a MC FL-910S
I have to kill some of my oil in my stash.
And I'm waiting on it to go on sale like last time.
A lot of boat people run Rotella T in gas marine engines like small or big block GM engines.
People who want to run a good diesel oil in their gas engine should look at the approved oils for Ford Powerstroke. It does NOT include some of the new CK-4 rated oils like Rotella T6.
MC 10w30 diesel oil is NOT SN approved FYI
Originally Posted By: Bud_One
Originally Posted By: car51
Originally Posted By: Bud_One
Ran some Delo 10W30 XLE in my Accord for 6k miles .
Ran great.
Why you stop? I'm putting DELO XLE 10w30 soon with a MC FL-910S
I have to kill some of my oil in my stash.
And I'm waiting on it to go on sale like last time.
Yeah, yeah likely story. I'll bet $1 I'll be flamed for running DELO XLE 10w30 and or DELO 400 SAE 30 in my Camry too
Originally Posted By: car51
Originally Posted By: Bud_One
Ran some Delo 10W30 XLE in my Accord for 6k miles .
Ran great.
Why you stop? I'm putting DELO XLE 10w30 soon with a MC FL-910S
I have to kill some of my oil in my stash.
And I'm waiting on it to go on sale like last time.
Yeah, yeah likely story. I'll bet $1 I'll be flamed for running DELO XLE 10w30 and or DELO 400 SAE 30 in my Camry too
Originally Posted By: hardheaded
does anyone run diesel oil in the gas engines ? my brother just had an engine rebuilt and the guy said to run diesel oil in it. why ? there are plenty of good motor oils out there.
Do you see the logic flaw there?
How many new cars come with a diesel-engine oil (HDEO) from the factory so that they will break in more successfully? Answer: 0. Most come with a full-synthetic PCMO as the break-in and future oil-change oil.
does anyone run diesel oil in the gas engines ? my brother just had an engine rebuilt and the guy said to run diesel oil in it. why ? there are plenty of good motor oils out there.
Do you see the logic flaw there?
How many new cars come with a diesel-engine oil (HDEO) from the factory so that they will break in more successfully? Answer: 0. Most come with a full-synthetic PCMO as the break-in and future oil-change oil.
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