Originally Posted By: Vlad_the_Russian
Originally Posted By: tig1
I have used M1 0-20 for at least 400K in my last three Ford Duratech 4 cyl engines, and have not noticed any unusual noise.
You don't notice it as you are used to it. Always on the same oil and have nothing to compare to. Fill the crankcase with a different oil, like Castrol Magnatec 0w20 for example, and you will be surprised with the results.
Or it could be the high 100 cst here
Amsoil Signature Series 0W-20 47.3 8.7
Mazda GF-5 with Moly 0W-20 35.0 8.3
Mobil1 Advanced Fuel Economy 0W-20 44.8 8.7
Pennzoil Platinum Full Synthetic 0W-20 42.8 8.4
but that's just numbers, right, riigghhtt..not endorsing M1 here at all, infact, I think you can find high cst