On 8/19/2017 10:48 AM, Bram van den Heuvel wrote:


My one question to you is if the synthetic doesn't thicken as much in the
cold, how does it keep the 75W and if it doesn't thin out in the heat as
much, how does it keep the 90 rating?

Isn't that what the rating is all about?
So doesn't one 75W90 act the same at cold/hot as another 75W90?


Better living through chemistry!