What temperature does synthetic oil actually degrade at?

[SubieRubyRoo]

My assumption was that we are under Full Synthetic oil of our choice within a given budget i.e. store brands since I don't use boutique oils. And if the oil is thinning out due to higher temperatures (as suggested by some members), we should then use a thicker oil within that budget +/- ... Not necessarily move to a boutique oil. Granted that it may not be a bad idea if one is willing to allocate a higher budget without compromising their short(er) OCIs.

It’s simple. M1 FS 0w40 answers your question.

 

[Rand]

I watched that video and it irrated the heck out of me - those guys are stupid. They couldn't figure out that duh the huge stress test they just did on 20wt oil and it thinned out - nothing bad happened except the low oil press light came on (AT IDLE mind you) temporarily and it was still above 15psi as the alert triggers under 20psi. So the truck made it where the Ford and Chevy didn't (they overheated) and they fail the Ram for a normal situation in my opinion. They have no mechanical smarts to figure that that 90 degree temps, towing up hill to 8000 ft with 10,500lb trailer in 4wd and 20wt oil.....it did AMAZING based on that level of stress.

I liked the one flashback, I think it was the Ford truck where they are running the heater to cool it down while they had the defrost/ air conditioning on LOL

 

[GMBoy]

I liked the one flashback, I think it was the Ford truck where they are running the heater to cool it down while they had the defrost/ air conditioning on LOL

I remember the scene but did not notice that part!!! I think they really are uninformed. I like their videos but wish they were more gear heads with some mechanical knowledge - they are just Joe Consumers that only know how to drive and put gas in.