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sae-30
Champion CJ-8
Should take a Champion: RC12YC
Go to this link and it outlines all Briggs and Stratton engine types and spares including spark plugs. http://www.manddsmallengine.com/briggs/parts/ Most common plug used in B&S is a RJ19LM
48 ounces or 1.5 quarts.
check you tube under removing the govenor on a Briggs and stratton
A Briggs & Stratton 6 HP Engine takes a little less than 1 quart of oil. When you get to about 3/4 poured in, Stop and check your oil. It may take a hair more but not a full quart.
SAE 30 weight in the summer or SAE 10w30 if you use the engine in cool temperatures.
40oz
it takes 20w50 motor oil
SAE 30