I have a few quarts of Defy 10-40, that says it is SN, and 2 gallons of Defy 10/30 that says it is SL. How can the 10-40 be rated with the latest lowered zinc ratings???
Q.S. Defy with different ratings
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That is what I thought, but just now looked again with my glasses on, and yup, says SN, plain as day.
10W40 is allowed to have higher ZDDP levels, & still be classified as SN (as Defy 10W40 does, around 1200 PPM Zn).
Oh, that makes sense, so I guess that explains it. Can't seem to find the 10/40 around town any more anyway.
Try your local Advance Auto Parts. Mine carries it and says they will continue to do so. I echo what has been said, SN rated 10W-40 is allowed more ZDDP than lighter grades. Love Defy, using 10W-40 in my Dakota now.
As already said, 40 and above is allowed to have more ZDDP. They also don;t have to worry about ILSAC since only 30 and below qualifies in the first place.
M1 HM does the same thing, 10w40 is SN while the other grades are SL-only.
Pennzoil HM is SN but not SN-RC/ILSAC GF5. They have a donut but no starburst. This applies to both the regular HM brown bottle as well as the new PPHM.
M1 HM does the same thing, 10w40 is SN while the other grades are SL-only.
Pennzoil HM is SN but not SN-RC/ILSAC GF5. They have a donut but no starburst. This applies to both the regular HM brown bottle as well as the new PPHM.
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