well ive been reading some stuff on this site for a couple weeks now regarding what oil to use in my mustang. its a 1989 5.0l with 200k miles on it. it doesnt leak any oil and burns maybe half a quart every 3k miles. ive been running castrol HM since i got the car at 182k miles. i also put a quart of the lucas oil stabilizer in it...but after reading the article about that stuff i wont be using it anymore. im just wondering should i just stay with that oil or is there something better out there. ive always heard that putting synthetic in high mileage motor is bad news because it will cause excessive blow-by. but if i were to switch to synthetic it probably wouldnt be mobil one or any of the others found in auto parts stores. i would probably try to find the best one possible. but anyways, what are some recommendations for my car. sorry for the long post, just tryin to get some info on this. thanks a lot
high mileage 5.0
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sorry, im running castrol high mileage 10w40 right now. dont know if that makes any difference
Try one of them hdeo 15w40 oils like rotella, delo400, delvac.
hmm...why do you say that? just because of the weight or what is in the oil itself?
A generic answer to a generic question. You are looking for the 'best', given your parameter of an engine w/ high mileage, but you are reluctant to try synthetic. Chances are that your engine is fairly 'dirty' internally, but you haven't indicated a desire to remedy that by using a product like Auto-rx, or Lube Control. If you are looking for a better alternative, to really quantify results you must also do UOA. You have most likely read a number of postings that talk about hdeo, and given your desire of better, that is probably a direction you may want to pursue.
well im not totally reluctant to try synthetic. the motor is actually fairly clean for the mileage. i was the first to take the valve covers off the motor about 15k miles ago and it is very clean inside. the oil never gets really dirty...just the normal brown that dino oil changes anyways. id like to run a synthetic as they provide better lubrication as opposed to dino oil. where can i find the auto-rx, i know we dont sell it at advance auto.
sorry, im just new to this whole thing and i am still trying to understand everything
alright, well i found where to get auto-rx. i guess ill get some for my next oil change or two and then switch to either delvac or a synthetic..unless anyone thinks that is a bad idea
50/50 mix of Delo 400 -15w40 and Havoline 10w30.
ECU50,
When I sold my 1990 LX 5.0 it had 160,000 miles. Synthetic in an old 5.0 won't cause leaks. The only leaks I had was the 'rear main' seal that had a very slow leak. Other than that all gaskets were original.
[ March 01, 2005, 03:31 PM: Message edited by: LT4 Vette ]
ECU50,
When I sold my 1990 LX 5.0 it had 160,000 miles. Synthetic in an old 5.0 won't cause leaks. The only leaks I had was the 'rear main' seal that had a very slow leak. Other than that all gaskets were original.
[ March 01, 2005, 03:31 PM: Message edited by: LT4 Vette ]
awesome thanks man. i guess ill go ahead and order some auto rx. should i do it twice or just once? probably should do it twice since the mileage is so high. but ill get some delo 400 and havoline 10w30 at work also. thanks for the help guys
ive just always heard that synthetics will cause leaks and blowby because they will clean the sludge away from any small leaks that were previously closed up by dino oil. i guess its all a load of crap. definetly gonna change my oil and run some delo/havoline blend. i dont know if i really want to run synthetics but i like the idea of running the deloquote:
Originally posted by LT4 Vette:
50/50 mix of Delo 400 -15w40 and Havoline 10w30.
ECU50,
When I sold my 1990 LX 5.0 it had 160,000 miles. Synthetic in an old 5.0 won't cause leaks. The only leaks I had was the 'rear main' seal that had a very slow leak. Other than that all gaskets were original.
Delo is cheap and has a very stout add pack. My car consumed about 1 quart of oil every 6000 miles, which is normal.....especially if it sees about 20 quarter mile runs between oil changes.
so do you think i should run that autorx or just switch at the next oil change? ive got about 800 miles to go on this oil change and it is still fairly clean. would it hurt to do a 50/50 mix with the delo and a synthetic oil?
I'd say skip the auto-rx, run all delo and see what kind of oil consumption you wind of with, and whether that high-detergency of the hdeo does anything for you. Depending on that outcome, you may want to revisit with the board on your next approach. Live experimentation.
Do yourself a huge favor and DO NOT go to a heavy oil in that engine.quote:
Originally posted by ecu50:
ive just always heard that synthetics will cause leaks and blowby because they will clean the sludge away from any small leaks that were previously closed up by dino oil. i guess its all a load of crap. definetly gonna change my oil and run some delo/havoline blend. i dont know if i really want to run synthetics but i like the idea of running the deloquote:
Originally posted by LT4 Vette:
50/50 mix of Delo 400 -15w40 and Havoline 10w30.
ECU50,
When I sold my 1990 LX 5.0 it had 160,000 miles. Synthetic in an old 5.0 won't cause leaks. The only leaks I had was the 'rear main' seal that had a very slow leak. Other than that all gaskets were original.
That engine needs quick start up protection and don't go into anything higher than a 10w oil.
Do not be convinced to got to a 15w oil when all it will do it starve your top end for oil pressure on startup.
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proof??
His stats say greenville ..NOT Greenland.
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I'm not the one who asserted that he'd have upper engine starvation. What do I have to prove???
I mean, if he has 500k on it and used gun cleaning fluid for 10k OCIs with Fram filters ...I'd say "GO MAN GO!!".
I'm a disinterested party. Now if he had said, "I'm using a 5w30 HM Castrol and it bugs me that I use a quart ever 3k ..what do you think will slow this consumption??" ..then I would probably (aside from the suggestion that an Auto-Rx treatement may relieve some of it OR telling him not to worry about it) suggest going up a grade in viscosity.
This recommendation would be based souly on the preceived ailment/condition and not just "do it because I have an insatiable desire to see North America bathed in 40 weight oil" syndrome.
If he lived in a severe or highly variable climate I would probably recommend seasonal adjustments to the visc accordingly.
Some situations are not remedied ...period.
Like you CAN'T EVER go up in viscosity ..EVER. Live with your sour grapes of being in a severly cold climate and an eternal sentence of using lighter weight oils regardless of your engines somatic complaints with their use.
You're trapped....others are not. Don't begrudge them their freedom ..simply because you can't share in it.
[ March 01, 2005, 09:18 PM: Message edited by: Gary Allan ]
I mean, if he has 500k on it and used gun cleaning fluid for 10k OCIs with Fram filters ...I'd say "GO MAN GO!!".
I'm a disinterested party. Now if he had said, "I'm using a 5w30 HM Castrol and it bugs me that I use a quart ever 3k ..what do you think will slow this consumption??" ..then I would probably (aside from the suggestion that an Auto-Rx treatement may relieve some of it OR telling him not to worry about it) suggest going up a grade in viscosity.
This recommendation would be based souly on the preceived ailment/condition and not just "do it because I have an insatiable desire to see North America bathed in 40 weight oil" syndrome.
If he lived in a severe or highly variable climate I would probably recommend seasonal adjustments to the visc accordingly.
Some situations are not remedied ...period.
Like you CAN'T EVER go up in viscosity ..EVER. Live with your sour grapes of being in a severly cold climate and an eternal sentence of using lighter weight oils regardless of your engines somatic complaints with their use.
You're trapped....others are not. Don't begrudge them their freedom ..simply because you can't share in it.
[ March 01, 2005, 09:18 PM: Message edited by: Gary Allan ]
Listen bro, I respect you and what do here. I truly do.quote:
Originally posted by Gary Allan:
I'm not the one who asserted that he'd have upper engine starvation. What do I have to prove???
But why wouldn't a 5w40 be a good choice here? It is a high mileage engine that needs all the help it can get getting oil to the top end quickly to further reduce the wear on startup.
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Sure a 5w-40 may suit his needs ..but what if he doesn't want to spend the money on a synth?? This isn't the case - in this case ..but for some synths are out of the question due to cost/OCI conflicts. Many can't afford to dump $5/quart oil every 3k ..but they need to dump it every 3k. It just won't work for them.
It's like a doctor managing "risk factors" in a older patient. The ticker may be strong ..but the digestive system may be flawed. The guy may have diabetes ..but also has high colestrol ..so he can't have a high fat/high protein diet .etc...etc...
It's like a doctor managing "risk factors" in a older patient. The ticker may be strong ..but the digestive system may be flawed. The guy may have diabetes ..but also has high colestrol ..so he can't have a high fat/high protein diet .etc...etc...
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