Quote:
Originally Posted by Myself
I've been daily driving a 305 with flat tappet cam for the last 16 years. My 95 Grand Cherokee is also flat tappet. No issues. Last few sbc I built also no issues. My method has been Valvoline VR1 conventional for break in along with a small bottle of break in additive. Then continue with VR1 for the first 10000 miles. Then I switch to Rotella T6 synthetin. I run that T6 in everything from my pushmower to a 300hp supercharged jet ski.
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As I said not everyone would agree.By the way Rotella changed the amount of zinc in t6 so what working before may not work as well now.heres some reading.
ikewise with motorcycles, though marketed as an engine oil for diesel trucks, Rotella T6 5w-40 synthetic oil has also found popularity with drivers and tuners of gasoline powered vehicles that utilize turbocharging or other forms of forced induction. Several owners of high performance model cars have adopted its use due to its high heat tolerance and its resistance to shearing. Rotella T6 is a Non Energy Conserving Oil, and does not meet GF-5 Oil specifications. When Rotella T6 was revised for the API specification(for use in spark ignition engines), its Zinc levels were effectively reduced. Higher(content) Zinc Additives(ZDDP) are required for flat tappet engines and cartridge bearings, which In previous formulations Rotella T6 had desirable levels of Zinc(ZDDP).
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