STP ! Any one still using it.

[Gene M.]

Re: STP ! Any one still using it.

I thought I saw somewhere on the inter web a listing of the major oils and additives listing the anti wear camshaft stuff in oils and supplements. My recollection (sometimes not so good) is STP was good in that area. But I'll admit I have not read the can label.

[Ken A.]

Re: STP ! Any one still using it.

Go to their website and I think you'll be surprised, especially the oil experts.

[Gene M.]

Re: STP ! Any one still using it.

Here is another discussion from Hotrodders about STP. Says good for ZDDP content.

http://www.hotrodders.com/forum/stp-oil-treatment-contains-zddp-214564.html

[Paul Y.]

Re: STP ! Any one still using it.

Back in the 60's and 70's it was a big deal. GM also had their version that was in every crate with a block. You would also think that they would also put a can of paint in the crate, but NO.It was to be added to all the warranty engines. GM called it " GM engine oil supplement ". Other thick products that were most likely out of the same vat were Motor Honey, STP, GM engine oil supplement, and so on, in pint cans.You could buy it at most oil suppliers by the gallon for $3.50, they called it VI ( viscosity improver ).Customers requested it to be added to engine oil changes, manual transmissions, and open rear ends.GM thought enough about it to put it in with crate engines. There was a screw driver test advertised, a straight slot screw driver tip was dipped in motor oil and you could hold it by the tip, then dipped in STP and it would slide out of your finger tips.I still use it on bearings during assembly because it's clear and you can see anything that shouldn't be on the bearing. Then I mix the rest with the engine oil. There are some racing oils that pass the screw driver tip test.Dom

Dom, in the early days I understand that STP was just pure polymer which had the ability to appear to thicken oil but in reality just made it flow slower when it was at a higher temperature by expanded molecules, and contained no zinc at all. GM's EOS has always been rich with zinc and that is why they put in a pint to break in the new crate engines and flat tappet camshafts. It also contained a certain amount of polymer that gave it body and helped it remain for longer on the metal it was supposed to protect (like honey on your tongue). I have read that STP now contains a certain amount of zinc although I am unaware of the amount. I still am a great fan of EOS although it seems there has been some change in it too in the last 10 or so years. My NOS LT-1 short block crate motor came with it's vintage EOS can of the 1971 vintage pint of which I lovingly gathered close. I agree with Duke that there is/was a vast difference between STP and EOS back in the day and may still be for that matter.

[Gary V.]

Re: STP ! Any one still using it.

The STP stickers are one great classic look!, I have one on my tool box.

[Art B.]

Re: STP ! Any one still using it.

Us guys with early Ford V8's find STP works very well in the steering box! Sorry, "the devil made me do it".

I'm one of those guys with the early Ford V8. I had a 1950 Ford V8 as my first car. I paid $300 for it in 1956. It burned oil badly. I used STP and seemed to cut down on the oil consumption. Perhaps my imagination.