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Re: 4000csq valve tapping gone possible cure
STP oil treatment! Wow, flashback to an old farmer I worked for as a
student who used this stuff like motor oil. Kept the motor in his '62 Poncho
fairly quiet and the oil smoke down to the point where you could almost see
out the rear window.
I think this stuff is a viscosity modifier - it makes the oil nice and
thick at operating temperatures. As a result, worn motors run quieter and
burn less oil. If this quiets your lifters, Joe, they are probably worn
internally and normal oil is too thin to expand them completely.
I don't think this is great stuff to use in a motor in good condition.
The only use I ever found for it was as a motor assembly lube. Mixed 50/50
with motor oil, it would stay on the bearings & cylinder walls until
'91 200q 261k km
From: Joe Rae <email@example.com>
To: quattro USA <firstname.lastname@example.org>
Date: Friday, October 30, 1998 1:48 AM
Subject: 4000csq valve tapping gone possible cure
>About a week ago I was at the local Al's/shucks/pepboys parts store and was
>wondering around looking at switched and air horns and stuff when I walked
>by the oils department. Looking down I saw a bottle of STP oil treatment,
>I bought a bottle. It has been 3 weeks since my last oil change and the
>valves on the 4000 were tapping quite loudly. So I decided what the hell, I
>would sue STP if the engine blew up ;] then drop in a MC turbo engine. Well
>I poured about 3/4 of the bottle ( the stuff is like slime) and half a
>bottle of oil. The next morning I was a little worried to start the car up,
>but cranking it up and no more tapping. It has been a full week and about
>800 miles with still no tapping.???
>Has anyone else tried this because I am usually very skeptical about the
>snake oil/ techron additives/oil cleaners but this seems to have stopped