Originally Posted by Jstpsntym
I had used Slick 50 in my Monte SS years back. The stuff did work. I never did any dyno tests or anything like that, but I did notice a 200 rpm drop in my cruising speed. It did seem to significantly reduce engine friction in that regard.
Couple of points on this and the preceding post:
1) If Slick 50 actually achieved a reduction in friction, you should see an _increase_ in rpm, not a decrease. However, engine speed to road speed is determined by the transmission torque convertor slippage (assuming it'* not locked in bypass by the TCC solenoid, which at highway speed it should be), and trans fluid is not touched by the Slick 50 in the crankcase. When it is in TCC lockup (cruising speed in high gear), engine rpm is directly, physically tied to road speed through the drivetrain, and still has no correlation to the type of oil in the crankcase. Friction reduction might help in acceleration, top-end speed and cold-starting performance, but not in determining what engine speed occurs at what road speed; that'* a straight mathematical number.
2) The fuel pressure regulator is at one end of the fuel rail on top of the engine, towards the driver'* side. It'* a small round metal diaphagm with a vacuum line plugged in. With the engine off, you might want to unplug the vacuum line and make sure it'* dry inside: if it pees gasoline at you, it'* leaking and you'll want to replace it as soon as possible.