Comparing a 30wt to a 40wt oil is what I was thinking. I've said this before, for a 0w-40, Mobil 1 is very shear stable. It only drops 1-3cSt at the most and for a 40pt spread, thats good IMO. A Castrol 0w-40 probably would be similar. But I do think GC is a better oil on a direct comparison.
OK, I want to know how many of you had to even look at my response to see which it would be?
PS Does each respondent get 1 vote for each qt of their choice he or she owns?
[ June 27, 2004, 07:22 PM: Message edited by: pscholte ]
quote:Originally posted by Rick:
ok well seeing as how the winters her get down to -40c will they both be equal or is one better then the other?
At -40C you will be fine with either...maybe a slight edge to M1 (depending on whether you think a pour point of -54F [M1] is better than an advertized unaided engine starts at -40F [SLX]). I'm giving you my choice for overall performance based on my perception and experience (I have used both, but SLX is my long-term choice between the two).