Quote:
Originally Posted by Turbo
Thanks, Hags for your very thorough reply! May I ask what brand/line of 0W-40 you were running?
|
It is Penrite 10 Tenths Racing 10W-40 (I know I said 0W-40 in the post but when I went to check it was actually a 10W-40. I have edited my post to reflect that.
Quote:
Originally Posted by Turbo
I've been looking up specs on various oils, focusing mainly on the Viscosity numbers @ 100 deg C and @ 40 deg C. What I'm finding is there is quite a variance brand-to-brand within a given spec'd oil weight.
My thinking is that if 2 oils have a comparable viscosity at 40 deg C (meaning they will pump similarly when 'cold') the one with the higher viscosity at 100 deg C would maintain pressure better as temps increase.
|
Maybe there is differences between brands with the same rating. I've never looked. The first number is the cold temp but this is below freezing temps, not at 40C. The second number is the viscosity at 100C. So a 10W40, 0W40 or a 20W40 should be the same viscosity at 100C.