Quote:
Originally Posted by G.M.
Read this attachment to understand a little about oils and decide what you want to use. G.M.
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CAUTION: That whole discussion is about oils for diesel engines. Gasoline and
diesel oils have different additive packages because the contaminates in the crankcase are different. With a gasoline engine you get a lot of moisture and tar and with a
diesel the
oil becomes acidic and will collect more carbon.
Many oils will work well in either engine type but it's always best to use an
oil specially formulated to the type of engine for optimal life.
You will see things like "API SG/CJ" on the
oil container, that means:
API = American Petrolium Industry
SG = Spark ignition, grade "G"
CJ = Compression ignition, grade "J"
The second letter is the grade designator, in alphabetical order, and later = better.
All oils analyzed in G.M.'s article are C grades for compression ignition engines (diesel engines). Not as good as S grades for our spark ignition engines.