Nope! I use 20W-50 in my car oil currently and that stuff is pretty thick!
I think ATF is probably the closest viscosity to 20W though? Good luck!
Eric
> 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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