Oh boy. For someone that’s been registered for three days, you sure are bold. Are you getting this rain in Bayonne?
Originally Posted By: LaCocina27
Originally Posted By: wemay
Originally Posted By: SR5
Just like the previous comment "as thin as possible, as thick as necessary" does not imply any lube related engine failures if you go a bit thicker. My comment does not imply any engine issues if you go to a colder W rating. The reason MB specs a 0W40 is because it works everywhere in the world, even if it is a bit thicker (40) than some sedate drivers need in a cold climate, and even though 0W is not needed for anybody in a hot climate. It's good world spec oil.
Valvoline published some great spec sheets before for their full synthetics. When you looked at the Noack volatility the 0W20 was more volatile than the 5W20 and the 5W30 was more volatile than the 10W30. This is comparing the same family of products that were formulated the same. Sure compare a PAO to a Group II and you can find an exception. But whenever you compare like with like, a lower cold starting ability comes with a higher volatility and often less shear stability due to more VII polymers. The oil itself doesn't shear, it's the VII polymers that shear, and the wider the grade the more VII polymers are used.
Don't get me wrong, I'm not anti 0W oils. Infact I got a great deal on some SynPower 0W40 and I happily used it in my very hot climate. I just would have preferred a great deal on some SynPower 10W30, as I didn't need an oil that thick, and I didn't need a cold start that low. But don't worry mate, my car survived fine.
Very well stated.
Indeed.
That quoted text, as well as
Quote:
"As thin as possible, as thick as necessary..."
should be the main takeaways from this thread, as far as knowledge, before this thread inevitably devolves into mindless bickering. Which it hopefully will not.