Quote:
Originally Posted by hotrodart
Lots of anecdotal stories, but no scientific facts......yet......maybe a chemist who knows about lubrication will chime in to clear this up.
BTW......I used STP in a Ford 312 engine for over 200K miles......the body rusted away and it ran like a clock when I sold it to a guy who put it in a fishing boat (not for the anchor!!).
I pulled the rocker covers frequently and never found any sludge.
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How about a chemical engineer that used to schedule production at a lube refinery? STP is not a lubricant. A lubricant is a branching chain paraffin. Enough said. IMHO what saves most of us from foolishly adding STP to engines is we don't drive them enough to cause severe damage by diluting the real lubricant.
"STP Oil Treatment product claims include protection against engine wear (hence, reduction of friction) and reduction of oil consumption. There are no controlled test results or relevant customer testimonials on the STP web site to document these product claims.
In 1978 STP Corporation and its then-parent company, First Brand Corporation, settled a legal action from the FTC over misrepresenting the role and benefits of motor oil additives in reducing wear inside engines. STP paid an $888,000 judgment, the third largest sum ever obtained by the FTC for a consumer protection violation."
https://cdn2.hubspot.net/hub/68152/f..._ball_0709.pdf