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Smokin Dog -> RE: Oil Viscosity and Brand (12/7/2007 8:09:12 PM)
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Hard to say....don't know where or what area you live in.
A 4 cyl engine needs a heaver viscosity than a 6 or 8
because it works harder to maintain speeds, ( higher rpms )
in the south no less than 20w-50 , better with straight
30w. Castroil is a good oil along with some others. The more miles the engine has the heaver the viscosity should be. in the north you may have to go to 10w-30 in the
cold season.
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