Originally Posted By: ARCOgraphite
High % of VII to get the 30w. It is essntially a light base oil between SAE 10 and 5 then additised to get the 30W. VII are NOT lubricants. Thats why you see HD oils used in aircooled engines and gensets rec SAE 30. They are prone to shearing out of grade. VII cause heavy valve head deposits (especially on DI engines and oil burners) and rung land gums and varnish. They are not an oil or a lubricant - especially the EPDM based product made from reground innertubes and tirte liners - yep thats where they get the stuff!
We are not dealing with;
A. Air cooled engines
B. DI engine
C. oil burner
High % of VII to get the 30w. It is essntially a light base oil between SAE 10 and 5 then additised to get the 30W. VII are NOT lubricants. Thats why you see HD oils used in aircooled engines and gensets rec SAE 30. They are prone to shearing out of grade. VII cause heavy valve head deposits (especially on DI engines and oil burners) and rung land gums and varnish. They are not an oil or a lubricant - especially the EPDM based product made from reground innertubes and tirte liners - yep thats where they get the stuff!
We are not dealing with;
A. Air cooled engines
B. DI engine
C. oil burner
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