|
If you're not tracking the car (or driving *way* too hard on the street in warmer months), just run 0w20 and don't worry. If you *are* tracking the car run HD 5w30 synthetic in the warmer months. I wouldn't bother with any additives from Lucas or anyone else...
I don't think anyone should be concerned about what the viscosity is at 40C.
Also don't think 240F is high, or that 260F is the "upper limit of acceptable" for oil temp. Any decent synthetic is going to be fine up to 300F and beyond. But if you are tracking and running higher temps, you'll definitely want to be running at least 30 weight.
|