> You *might* find some SAE 20 in a lawnmower shop???
Multiweight 20W-50 has the viscosity of 20wt, doesn't it?
General rule: The thinner the oil, the quicker the acceleration.
However, too thin and you'll go lean when you stomp on it.
Thicker oil tends to smooth out the idle, especially on a worn
engine (dampens the effects of uneven manifold vacuum). Lack
of any oil tends to cause rough idling.
Experimenting with dashpot oil and spring rates (those long
'slinkies' under the domes) can add a slight edge when split
seconds count. For my daily driving, I've found little difference
between Marvel mystery oil, ATF, 10wt and 30wt. As long as
there's 'something' in there. (Well, axle grease would probably be
a bad idea :-) ).
Keith, what say you?
-- John
John F Sandhoff sandhoff@csus.edu Sacramento, CA
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