Originally Posted By: globey
Originally Posted By: JHZR2
Are you sure it is SM rated? The autozone by us sells an SA rated oil for "older" cars (defined as pre-1988, IIRC), and then a regular oil, which Im sure is recycled or left-over stock from a previous API cert.
The autozone oil by us was API SL long after SM oils hit the shelves in bulk. I have to guess that the old stock became autozone oil.
The "for older cars" oil is the Valucraft oil and it's not SA rated. The Auto Zone oil has SM specs. The old stock did not become Auto Zone oil...this is merely a renaming of the "Coastal" oil that Auto Zone used to carry. Same oil, different bottle, same specs.
And just for the record. at least some "Valuecraft" oil is rated a nice, stout SL!
My father uses the 10W-30 Valuecraft SL in his lawnmower..