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#1537247 - 07/19/09 04:30 PM stp oil treatment
grease_monkey Offline


Registered: 12/08/08
Posts: 325
Loc: oregon
I have never used stp before,but I have heard that it contains a 50 weight oil and a ton of zinc. So here's my queston. Does this stuff contain detergents or solvents that break down or remove sludge?

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#1537258 - 07/19/09 04:45 PM Re: stp oil treatment [Re: grease_monkey]
Falcon_LS Offline


Registered: 10/03/08
Posts: 3941
Loc: Kuwait
Not to my knowledge, and I have used this in the past to thicken my oil. Here are some specs on it:

Viscosity at 40C: 5200-6340 cSt
Viscosity at 100C: 250 cSt
Zinc compounds: 10%
Petroleum distillates: 30%
Mineral Oil: 60%
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#1537264 - 07/19/09 04:52 PM Re: stp oil treatment [Re: Falcon_LS]
fuel tanker man Offline


Registered: 08/04/04
Posts: 1344
Loc: wytheville, va
We had a VOA on the STP here at one time.

It's got a lot of viscosity enhancers in it. Just how these things affect the base oil you put it in is beyond me.

I have considered thickening a 50 weight oil for my motorcycle with some STP, since the bike tends to shear every oil I've put in it down to a 40 weight.

But I don't know how much ZDDP it has...

Dan

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#1537285 - 07/19/09 05:13 PM Re: stp oil treatment [Re: fuel tanker man]
rszappa1 Offline


Registered: 02/24/06
Posts: 1664
Loc: louisville ky
back in the 60s and early 70s STP was part of an oil change for me....

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#1537399 - 07/19/09 07:37 PM Re: stp oil treatment [Re: rszappa1]
Bluestream Offline


Registered: 09/13/03
Posts: 5667
Loc: Waterloo, ON
 Originally Posted By: rszappa1
back in the 60s and early 70s STP was part of an oil change for me....


Ya me too...I don't think its needed with todays oils
_________________________
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#1537495 - 07/19/09 09:27 PM Re: stp oil treatment [Re: grease_monkey]
river_rat Offline


Registered: 04/13/09
Posts: 3402
Loc: Iowa
 Originally Posted By: grease_monkey
Does this stuff contain detergents or solvents that break down or remove sludge?

It contains detergents, yes. But not for sludge removal, it is to keep the detergency level in balance with the additional zinc (ZDDP) that you are adding to the oil when you put it in.
It's real intended purpose is to strengthen the oil film and prevent metal-to-metal contact, and in the event of that contact, to add boundary layer lubrication form the boosted zinc compounds.
Probably not really needed, but probably not harmful either. It's sure been a tried product all these years.

PS:
They also make a 4 cylinder formula (red bottle) that according to STP via email, has the same ZDDP content but about half the viscosity numbers. I ordered some to try from Autobarn because no store carries the red bottle around here.

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#1537679 - 07/20/09 01:41 AM Re: stp oil treatment [Re: river_rat]
72customdeluxe Offline


Registered: 03/16/09
Posts: 131
Loc: texas
I tried finding the voa on stp products on here, but the word stp is too short. I was wondering specifically about the 4 bottles of 4-cylinder treatment I bought at a store. I snapped them up because I can never find them in my area
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#1537736 - 07/20/09 05:15 AM Re: stp oil treatment [Re: 72customdeluxe]
Gary Allan Offline


Registered: 09/28/02
Posts: 39806
Loc: Pottstown, PA
http://www.bobistheoilguy.com/forums/ubb...true#Post952129


For some reason just using the "newer than 5 years" only gets me back a limited amount in history. If I put "older than 1 year" I get additional posts. It didn't always work this way, but when I kept seeing stuff only back to some day in 08 ..when I KNEW it was back there, I had to try something.

The original link is gone, but Tall Paul has the data.

btw- I put in STP OIL TREATMENT.


The data is the same, but here's the CAT-BUTLER page that it's on. It's in alphabetical order.

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=478132#Post478132


Edited by Gary Allan (07/20/09 05:18 AM)
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#1537866 - 07/20/09 09:09 AM Re: stp oil treatment [Re: Gary Allan]
river_rat Offline


Registered: 04/13/09
Posts: 3402
Loc: Iowa
Oh, hey, thanks Gary! you da man.

Here's the only info I got directly from STP:

"July 13, 2009

Thank you for contacting us about your STP Oil Treatment. We always appreciate hearing from our consumers.

We sold our filter division many years ago to Champion Laboratories. You may contact them for technical information at 1-800-882-0890.

Unfortunately, the amount of ZDDP in both of our oil treatments is proprietary. However, what I can tell you is that the amount in both the red bottle and blue bottle are similar. If you add either product to four or five quarts of oil, it will provide you with the same protection the older motor oils once provided. I hope this helps you.

Again, thank you for contacting us.

Sincerely,
Patti Copper
Consumer Response Representative
Consumer Services"

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#1538289 - 07/20/09 02:53 PM Re: stp oil treatment [Re: rszappa1]
Ken2 Offline


Registered: 12/02/02
Posts: 6380
Loc: Washington St.
 Originally Posted By: rszappa1
back in the 60s and early 70s STP was part of an oil change for me....

Only when I was getting the car ready to sell.....
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#1538312 - 07/20/09 03:16 PM Re: stp oil treatment [Re: Ken2]
Kruse Offline


Registered: 10/05/05
Posts: 3911
Loc: Kansas
 Originally Posted By: Ken2
 Originally Posted By: rszappa1
back in the 60s and early 70s STP was part of an oil change for me....

Only when I was getting the car ready to sell.....


Back in my younger days, I was a mechanic on a demolition derby team. A lot of these cars run wide open (or nearly so) for maybe 15 minutes at at time, sometimes with little or no coolant.
We used to run some of these cars with 100%, or nearly 100% STP oil treatment in the crankcase. You got to remember that most of these engines were real loose and sloppy.
I don't know if there is a situation today where it is really needed and I haven't used it since.

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#1538371 - 07/20/09 03:55 PM Re: stp oil treatment [Re: Kruse]
moribundman Offline


Registered: 06/02/03
Posts: 23591
 Originally Posted By: Kruse
I was a mechanic on a demolition derby team.


Sounds like a really frustrating job.

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#1541514 - 07/23/09 11:09 AM Re: stp oil treatment [Re: Kruse]
river_rat Offline


Registered: 04/13/09
Posts: 3402
Loc: Iowa
 Originally Posted By: Kruse
We used to run some of these cars with 100%, or nearly 100% STP oil treatment in the crankcase. You got to remember that most of these engines were real loose and sloppy.

Now that is some funny Sh..!

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#1542496 - 07/24/09 08:26 AM Re: stp oil treatment [Re: river_rat]
rszappa1 Offline


Registered: 02/24/06
Posts: 1664
Loc: louisville ky
Yup in my 1968 Dodge charger it was 5 quarts of 30 weight Quaker State racing oil and a can of STP and off to the drag strip....

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#1584462 - 08/31/09 01:10 PM Re: stp oil treatment [Re: rszappa1]
addyguy Offline


Registered: 09/08/05
Posts: 14039
Loc: Canada
Originally Posted By: rszappa1
Yup in my 1968 Dodge charger it was 5 quarts of 30 weight Quaker State racing oil and a can of STP and off to the drag strip....


That must have been fun!

:D
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VWB 10W-30; OEM Kia filter.

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