Greetings,

I was wondering about the weight ratings on synthetics.
I would like to run it in my smaller engines like my lawnmower and
snow blower, I was even thinking about changing out the oil for my
shop compressor and switching to synthetics.
A while back I converted to synthetic oil in my 2003 Trailblazer,
Since I've changed over in my Trailblazer I've noticed a little better
gas mileage and have also noticed that the engine temp is a little
lower, so, I know that it must be doing a better job.  When I was a
kid I remember a product called, I believe, Slick 50, some sort of oil
additive.  I saw a 3.5 HP horz shaft Briggs and Stratton engine
running with only a few drops of it in the crankcase.  I remember that
I got in a heated debate about putting a load on the engine with only
a few drops of lube inside, engines need to run the proper levels for
cooling, etc... Anyway's, Is there any rule of thumb for switching
straight 30W needed for the small, less than 10 HP, 4 cycle engines
that only have an oil slinger in them.  I'd like to run AMSOIL, or,
more locally available, Mobil 1.

Any info would be greatly appreciated,

Take care,

Mark