$100 Site Donor 2021
- Apr 28, 2008
- Ontario, Canada
Originally Posted By: Autodarken
I'll be honest, I'm really confused by your post OVERKILL. While I corrected my error when I called out temps, and provided the spec showing 0w-40 was thicker than 0w-20 when cold, I'm still getting grief. Where's the beef?
Which you admitted was wholly incorrect (you had posted the wrong temperature) and I acknowledged that. So if we correct the temperature and say -30C for example, the only one that is going to be thinner than the 0w-40 is the 0w-20. There's a low temperature cross-over where the 0w-xx oil thickens less than the 5w-xx oil and that's how it manages to carry the 0w-xx designation. So a 5w-30 will be thinner than a 0w-40 at operating temperature and then below 0C for a while until there's a crossover where the 5w-xx begins to thicken significantly and the 0w-xx does not. It is not until the temperature is much colder that the 0w-xx begins to thicken in the same manner. I tried to explain the limits for CCS and how they applied and you sarcastically replied to me telling me I better talk to Mobil and tell them they are wrong and then proceeded to quote the MRV values for their 0w-20 and 0w-40, which have nothing to do with CCS and are measured at a completely different temperature. Not sure where the disconnect is here, but the reason you are getting grief is because you've generally been a bit sarcastic and rude.
The W rating is @ 32f/0c, so you may want to double check on this statement. I found under 32f specs for 0w-40 Mobil 1 was drastically thicker than 5w-30's, 5w-20's and 0w-20's.