After viewing the numbers, it appears the M1 15w-50 shears most of the time to a 40 weight oil. A few of the tests showed it staying in the 50 range. Curious to see who here uses that weight, and with what success. BTW I have a 280zx, thinking of using a thicker oil, but it'll run 10w30 just fine. I realize running diesel oil is also a good option.
Mobil 1 Viscosity
- Thread starter Z_ombie
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A few of the recent SM version of 15w-50 UOA's do show it shearing often. It used to be a PAO/Ester based oil but now it's a Group III/V blend. The HT/HS is also a lot lower than it used to be. (5.1 vs 4.2?). I believe the quality of Mobil 1 in all viscosities has dropped quite a bit.
They significantly lowered the ZDDP levels in M1 15W-50 EP as well.
Why is this posted in the UOA section?
I am using a blend of Mobil 1 5w30 EP and the 15w-50 EP with great success. You can check it out on my 1997 Honda Accord. Don't quite understand all the mobil 1 bashing. Just hope it helps the price come down somehow.
Buster! The HTHS is 4.6 not 4.2. This is not up to your usual standard of acuracy. Have a great day!
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