Originally Posted By: TheKracken
So, one thing I am still unsure of since Fuel economy is not based on the numbers I posted. Would a 5w20 or a 0w40 be better for fuel economy at start up? Which would be thinner?
With few (?any?) exceptions, any xxW-40 oil will be thicker than any yyW-20 oil at any temperature (seen inside an automotive engine), and thus consume more power getting pumped around the engine, thus yielding lower FE.
So, one thing I am still unsure of since Fuel economy is not based on the numbers I posted. Would a 5w20 or a 0w40 be better for fuel economy at start up? Which would be thinner?
With few (?any?) exceptions, any xxW-40 oil will be thicker than any yyW-20 oil at any temperature (seen inside an automotive engine), and thus consume more power getting pumped around the engine, thus yielding lower FE.
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