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#3265446 - 01/30/14 11:02 PM STP oil treatment
mclasser Offline

Registered: 04/13/13
Posts: 375
Loc: DC
Anybody heard of this stuff? Saw it advertised in the Pep Boys circular. I've never really been a fan of STP products.
-- 2013 Honda Pilot EX-L 4WD
-- 2002 Honda Accord EX-L SULEV 175k miles: PU 5W20 & Honda A02
-- 2002 Infiniti I35 85K miles: PU 5W30 & P1

#3265451 - 01/30/14 11:06 PM Re: STP oil treatment [Re: mclasser]
Ramblejam Offline

Registered: 11/05/13
Posts: 879
Loc: Kentucky

#3265457 - 01/30/14 11:15 PM Re: STP oil treatment [Re: mclasser]
paulo57509 Offline

Registered: 07/13/03
Posts: 1683
Loc: Tracy, CA
STP Oil Treatment is way old skool (like me).

I didn't even think they made it anymore. I think I have a pile of STP stickers someplace.

I remember when I was a kid working in my Dad's shop. I was goofing around one day when I put a drop of STP into a container of Berryman B-12.....the STP balled up and turned into a hard rubber-like mass.

I knew a guy that owned a '61 Biscayne that had a slipping Powerglide. He poured a can of STP into the transmission and the slip went away. After the growing season was over he drove it back to Oklahoma. Still had the same car when he returned the next season.

#3265464 - 01/30/14 11:32 PM Re: STP oil treatment [Re: mclasser]
expat Offline

Registered: 05/12/09
Posts: 3480
Loc: Canada
Good for getting the very last 2k miles out of a very tired engine.

But that's about it.

#3265489 - 01/31/14 12:18 AM Re: STP oil treatment [Re: mclasser]
Voltmaster Offline

Registered: 10/08/12
Posts: 764
Loc: California
One of those prob does nothing products...

Maybe or maybe not as bad as Lucas, I wouldnt use it personaly.

High quality oil = no need for additive no matter what.

Only additive I believe is MMO , techron, and RP . All used for upper cylinder lubricant and their help in opening clogged nozzles. I only buy if a can is less than 3 bucks.... RP had rebate on theirs and I got 6 for 1 dollar each after rebate.

Edited by Voltmaster (01/31/14 12:20 AM)

#3265492 - 01/31/14 12:34 AM Re: STP oil treatment [Re: mclasser]
Cristobal Offline

Registered: 01/02/11
Posts: 1853
Loc: Montebello, CA
It is not worth the money for most engines. All it really is is an oil thickener.
So says the 1996 Toyota Avalon:

The Poodles will conquer the Galaxy. All Cats must die!

#3265555 - 01/31/14 05:46 AM Re: STP oil treatment [Re: mclasser]
FL_Rob Offline

Registered: 06/03/09
Posts: 1314
Loc: gulf coast FL.U.S.
Here ya go. VOA on pg. 2


#3265584 - 01/31/14 06:45 AM Re: STP oil treatment [Re: mclasser]
Donald Offline

Registered: 03/21/04
Posts: 12647
Loc: Upstate NY
You add it to cars you are about to dump so they appear to burn less oil.

Never run it in a car you are keeping.
2001 Jeep Grand Cherokee Laredo 4.0 - Rotella T6 & M1
1999 Dodge Ram 2500 w/Cummins - Rotella T6 & M1
Amsoil ATF in both vehicles & Magnefine filter.

#3265625 - 01/31/14 07:34 AM Re: STP oil treatment [Re: mclasser]
racin4ds Offline

Registered: 05/07/10
Posts: 333
Loc: Winchester, VA
Originally Posted By: mclasser
Anybody heard of this stuff? Saw it advertised in the Pep Boys circular. I've never really been a fan of STP products.

Wow man, you been living under a rock the last 20 years! STP oil treatment has been around forever and isn't much good for anything other than engine assembly lube or for a car auction dealer trying to get a POS to run through the line one more time to sell it...
2001 Ford F150
2013 Nissan Sentra S
1994 Civic Hatch-Fully Built B18C-R!
1995 Civic Hatch-DD

#3265645 - 01/31/14 08:08 AM Re: STP oil treatment [Re: mclasser]
Chris142 Offline

Registered: 06/05/03
Posts: 10601
Loc: apple valley, ca
Its been around since the 50's atleast. I put some on a customers car last week. Tired v8 ford would not build oil pressure at idle so the oil light flickered with 10w30. A bottle of stp fixed it. Well kept the light off. Car is a pile anyway
02 Jeep Wrangler QS 5w30
87 F250 Diesel Delvac 15w40
04 Tahoe STHM 10w30
Z400 napa 15w50
KLR250 Maxima 10w40
Polaris Trailblazer Polaris 5w50

#3265979 - 01/31/14 02:29 PM Re: STP oil treatment [Re: mclasser]
KCJeep Online   content

Registered: 06/30/11
Posts: 4208
Loc: Mahzurrah!
When I was a kid no oil change was complete without a can of STP. Every time I see the logo I still think of Richard Petty.

It's essentially an oil thickener, old school polymer viscosity index improvers with a few additives (less than the oil your adding it to though, so it's no booster additive wise).

It is still useful for an old beater, or if you find yourself needing thicker oil and you don't want to change it. My Jeep likes thicker oil and I've used STP before with 5w30 and it ran great on it. Not a long term plan though....

I had planned at one point to do a full OCI and UOA with STP in the crank for curiousity/posterity's sake but probably won't happen now, too many projects! Could be a good project for one of the other old cars instead of the Jeep I guess.
2004 Jeep Grand Cherokee 4.0 @ 119k "GC" Edge 0w30
Fram Tough Guard TG8A
KIA Sedona 33k, Chevy Lumina 166k, Chrysler Sebring 169k, Ford Ranger 172k!

#3309895 - 03/12/14 08:49 PM Re: STP oil treatment [Re: mclasser]
Plumber Offline

Registered: 10/23/13
Posts: 95
Loc: Northern Illinois
I add a bottle to an oil change for the 54 Plymouth car and the 91 Chevy 1500 W/T.

#3309927 - 03/12/14 09:18 PM Re: STP oil treatment [Re: Plumber]
Clevy Offline

Registered: 11/11/10
Posts: 6516
Loc: Saskatoon canada
Originally Posted By: Plumber
I add a bottle to an oil change for the 54 Plymouth car and the 91 Chevy 1500 W/T.

Why not buy thicker oil. It's what your doing anyways,and diluting the add pack of the original oil of course.
2006 Charger RT
Miles x 2 per oil filter

#3310166 - 03/13/14 05:51 AM Re: STP oil treatment [Re: mclasser]
Shannow Online   content

Registered: 12/12/02
Posts: 25357
Loc: a prison island
Used to use it back in the day with either Castrol GTX or Valvoline XLD 20W-50 every oil change.

Never now, although I do like playing with it, and acetone to get the polymer out of it.

Interestingly with the stuff (and morey's and Lucas) if you pick up a 60 tonne turbine shaft, coat the shafts in STP (or the others), and re-set in their bearings, you can turn it as required for a couple of shifts a half turn here or there.

#3310350 - 03/13/14 09:20 AM Re: STP oil treatment [Re: mclasser]
rockydee Offline

Registered: 03/09/14
Posts: 79
Loc: VA
Back in my day STP was the "racers edge", it stayed up all night coating engine parts. They had a few slogans over the years. I could have sworn Richard Petty took baths in it.

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