So I track my car and I notice that (very generally, due to different atmospheric, tire, and overall conditions never being the exact same two sessions in a row, much less two different days separated by weeks), when I run a thicker oil, my oil temps are higher. Which begs the question, is running a 40w oil "worth it" over a 20 or 30, based on the fact that it actually raises oil temps, on average, about 20ish degrees?
The weights are defined by viscosity at 212F, but how does the relationship to viscosity hold up at higher temps? Is shell Rotella T6 5w40 producing more protection at 290 degrees than Mobil1 0w20 at 250? I'm trying to pick two extremes here, but is there a crossover point for where one is better than the other? Thanks!
The weights are defined by viscosity at 212F, but how does the relationship to viscosity hold up at higher temps? Is shell Rotella T6 5w40 producing more protection at 290 degrees than Mobil1 0w20 at 250? I'm trying to pick two extremes here, but is there a crossover point for where one is better than the other? Thanks!