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Reply to "Truly which synthetic brand of motor oil is the best?"

Redline uses a different ASTM method for HT/HS than Valvoline , Pennzoil and other oil makers .

Sorry , I cannot recall the differences in these methods .

Solids . All moly's are solids correct ? Even the newer oil soluable type used in most car oils ?

Originally posted by MGBV8:
Redline HTHS

15W-50 5.8 M1 15W-50(5.11)
20W-50 6.1

Redline should go on forever and no need for solid additives.