Small but interesting (to me) point I noticed about the AP 5W30 compared to M1 5W30...
AP 5W30 is quite a bit thicker than the standard product at 100C (roughly where my oil temp will sit once it is warmed up), 11.7 cSt compared to 11.0. The AP is actually not that far below M1 5W30 ESP at 12.1 cSt at 100C.
But, take it up to 150C for HTHS and the AP is 3.0 mPa*s while standard M1 5W30 is 3.1. I don't know why different units are used to report HTHS (density related?), but I did read that mPa*s is numerically equivalent to cP. M1 5W30 ESP kills both of these with a 3.58 HTHS.
I know that what's being measured is not quite the same in the two tests, but the suggestion that the AP's viscosity is falling off faster with temp than that of the standard M1 surprised me a bit. I don't know if this might suggest something about the composition of the oil to somebody in the know?
AP 5W30 is quite a bit thicker than the standard product at 100C (roughly where my oil temp will sit once it is warmed up), 11.7 cSt compared to 11.0. The AP is actually not that far below M1 5W30 ESP at 12.1 cSt at 100C.
But, take it up to 150C for HTHS and the AP is 3.0 mPa*s while standard M1 5W30 is 3.1. I don't know why different units are used to report HTHS (density related?), but I did read that mPa*s is numerically equivalent to cP. M1 5W30 ESP kills both of these with a 3.58 HTHS.
I know that what's being measured is not quite the same in the two tests, but the suggestion that the AP's viscosity is falling off faster with temp than that of the standard M1 surprised me a bit. I don't know if this might suggest something about the composition of the oil to somebody in the know?
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