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mlclark: But oil classifications superceed each other. So SM covers all the requirements for SF.


exactly ! er, well not exactly. according to that api sheet, (and i *tend* to give them some credence on oil issues...) according to api
SJ is current, For 2001 and older automotive engines
SL is current, For 2004 and older automotive engines

and as you point out SM is current and supercedes For all automotive engines currently in use.

so in the case of SJ and SL at least,all oil classifications *haven't* necessarily superceded each other.

in anycase, the original poster was confused about, and asked for information about, what he thought were different recommendations in his manual, i.e. whether the recommendations for Grade and Viscosity were contradictory or the same thing. it would seem that getting the real info from the horses *mouth* was a good thing, and thus the link.

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mlclark: Just go buy some 5W-30 and be done with it.[


or actually *learn* something from the expert on oil designations (api) since they are the ones designating them.

[[ i know it can be fun with these flip remarks, but it can also be rather tiresome sometimes, too. ]]

//bc

1992 sohc trooper 3.2l v6 automatic . . . as is

i love a good intermittent electrical challenge. . .especially when it's someone else's.