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#1 |
Registered User
Join Date: Oct 2011
Location: Michigan City, Indiana
Posts: 158
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High Mileage Oil Treatment
i put some STP High Mileage Oil Treatment On My 86 350 and was wondering if this stuff was anygood?
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#2 |
Registered User
Join Date: Mar 2012
Location: Lancaster,SC
Posts: 74
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Re: High Mileage Oil Treatment
i don't know bout the high milage,but i ran the regular STP oil treatment in my race car for years with no problems. as long as you keep the oil changed regularly,there shouldn't be a problem.that stuff is thick as molasses and don't break down as much as oil does.
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#3 |
Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: High Mileage Oil Treatment
If it says it seals leaks don't use it. It will turn your seals to mush over time. The only help for a high mileage engine is a rebuild. While all these voodoo oils and sealants help restore performance for while they still are only temporary an the engine will go downhill soon after and quick. Just keep the regular maintanence and if you want help with the engine use hyper lube it's a gold bottle and works good for as long as your engine lasts
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377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511 |
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#4 |
Registered User
Join Date: Aug 2009
Location: Oregon
Posts: 611
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Re: High Mileage Oil Treatment
Waste of money.
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'73 K20 Cheyenne Super Camper Special 350/TH350/NP205 sittin' on 33's. You can set my truck on fire and roll it down a hill, and I still wouldn't trade it for a Coupe de Ville. |
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#5 |
Registered User
Join Date: Sep 2011
Location: Chesterfield, Va.
Posts: 339
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Re: High Mileage Oil Treatment
STP oil treatment is a high level ZDDP product for high lubriticity ( ZDDP boost is also needed for flat tappet cams now that modern oils have cut back on ZDDP content ). The high milage version adds seal swellers to it to chemically soften seals that have hardened over time. Trying to bring "Rubber" or neopreme seals back to life isn't gonna happen. It breaks down the compound of the seal to make it softer. Does it work? Yes, for a while, a short while, then when the seal fails, it goes quickly, and aggressively. From the scientific tests posted at Bob the oil Guy's website, additives like ZDDP, and metal pore penetrating products like Zmax help out a bit fighting wear, however seal swellers will doom those seals.
I remember back in the 70's, the big "Fix" for leaking seals was to put brake fluid in the oil to swell the seals,.... stop leaking about 2 weeks then you would start seeing major seal failure. Last edited by Weasel Diesel; 04-28-2012 at 08:09 AM. |
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#6 |
Robert Olson Transport
![]() Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,288
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Re: High Mileage Oil Treatment
the only thing ive ever used this stuff for is if i have a motor with a crank bearing going and i wanted to try to get some more out of it before a rebuild or replacement it will maks the noise for a while.. other than that its useless
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Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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#7 |
Registered User
Join Date: Sep 2010
Location: Lake Tahoe, Nevada
Posts: 755
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Re: High Mileage Oil Treatment
I'm wondering if the High Mileage oils are part of a conspiracy to get old engines off the road.
Like others have said, the additives that help "recondition" seals help for a temporary time, but they're damaging in the long run. You're basically rotting and deteriorating the seals. Yeah, they expand and soften, so they often seal better for a short time, until they fail completely.
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I know a little about cars, but if you have a question about electricity or sport quads, I'm your man!!! |
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#8 |
78 Big10 454
![]() Join Date: Jul 2008
Location: Pismo Beach, CA
Posts: 838
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Re: High Mileage Oil Treatment
I just use 50 weight motor oil.....
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1978 Chevy SWB C-10 2WD 454/400 |
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#9 |
Registered User
Join Date: Sep 2011
Location: Chesterfield, Va.
Posts: 339
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Re: High Mileage Oil Treatment
Gotta say, I'm with ya on that one.
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#10 |
Truck Nut
![]() Join Date: Jun 2007
Location: Wills Point, Texas
Posts: 407
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Re: High Mileage Oil Treatment
Ive got 215k on my daily driver. I use the cheapest oil and a bottle of Bardahl No Smoke or add some Marvel Mystery Oil. It never did smoke. Seems like the motor is quieter with the No Smoke in it.
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Tony Kee Texas Square Bodies |
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#11 |
Registered User
Join Date: Jul 2007
Location: Tucson, AZ
Posts: 3,188
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Re: High Mileage Oil Treatment
No. Bottom line - just thickens your oil. I ran straight 40W in my old 73 BB, but I think that might have hastened its cam failure (due to "soft lobes"?), which was common on early 454s.
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#12 |
Registered User
Join Date: Feb 2012
Location: Depew, OK
Posts: 204
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Re: High Mileage Oil Treatment
Cam failure is accelerated by the lack of zddp as stated earlier.
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~Jon Ol Green 1970 K10ish LWB,454/400/205, been in family since new.
My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=516056 |
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#13 |
Registered User
Join Date: Dec 2010
Location: sioux city, iowa
Posts: 619
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Re: High Mileage Oil Treatment
I would NEVER use STP. Red Line and Royal Purple have some good products. And if you want your vinyl upholstery to dry out and crack use Armorall.
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