Reply to "Esters and GF-5"

motorbikeMember

The phosphorus min max for GF-4 was .06 - .08

For GF-5 the minimum is .06 and maximum is .07 . A narrow window huh ?

JAMA was concerned about timing chain wear and elongation from soot . It appears they settled on this simply because of engines that use timing chains . It was going to be a .05 maximum phosphorus limit from what i can decipher .

11/22/089:48 AM

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