Why not 0W-50 for all?

[Shannow]

Originally Posted by jongies3

Unless you're running an air cooled v-twin motorcycle or old VW Bug in hot weather and traffic, a 50wt isn't necessary for a liquid cooled car engine, they'll never get hot enough to need the extra protection from thermal breakdown. 30wt is the universal average and most widely used viscosity to date for good reason, it offers good protection across a range of temperatures and is easy to come by. Try finding a 5W-50 at any parts store!

Really, the universal average oil ? Try averaging the grades here... https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4858437/1 A3/B4/C3/Dexos 2 30s and 40s seem to be the Oz average ATM.... A Dexos 2 5W30 is nothing like an ILSAC 30.

 

[RooflessVW]

Originally Posted by jongies3

Unless you're running an air cooled v-twin motorcycle or old VW Bug in hot weather and traffic, a 50wt isn't necessary for a liquid cooled car engine, they'll never get hot enough to need the extra protection from thermal breakdown. 30wt is the universal average and most widely used viscosity to date for good reason, it offers good protection across a range of temperatures and is easy to come by. Try finding a 5W-50 at any parts store!

Almost every parts store carries Castrol 5W-50 for the Mustang guys. All of my NAPA stores carry Mobil 5W-50.

 

[vq35de_touring]

Question. Wouldn't an engine just shear the oil down to it's choosing?