2008 Jetta S 2.5 , VW 502 oil specs are met by Moble1 synth 0-40W, 5-40W, 10-40W.
Back in the day of one weight oil, the standard philosophy was the hotter the driving conditions the heavier the oil used. End of problem.
My question (which I’ve had since synth came out) is now with these multi viscosities does the same philosophy apply? Do I use 10-40W because I live and drive in Florida? or is 0-40W still OK in Florida?