Quote:
Originally posted by oilburninokie
Mobil 1 15W-50 has the same cold pumping viscosity of Rotella T 15W-40 (7000 centipoise at -20C), which is not very good. Pour points have very little real world value(statement from Mobil). The cold cranking simulator is directly related to your engines function of pumping the oil and is a much better guage for cold weather characteristics.
Mobil 15W-50 is not a very good cold weather oil. You can get better. It is also not the best for your diesel, carrying the old API CF rating. Mobil 1 0W-40 also carries the old CF rating.
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Oilburninokie:
I agree with you for the most part, I just have one question... Where did you get your data? I cannot find the current mobil1 cold cranking specs on the mobil1 website's product data sheet.
Can you point me to the source, I have some investigating to do for into the 15w-50 vs 0w-40 for use in my bmw, and want those and a bunch of other specs.
Their current PDS is here, and doesnt show the ccs info, or much of anything...
http://www.mobil.com/USA-English/Lubes/PDS/GLXXENPVLMOMobil1_15W-50.asp