Originally Posted By: Nickdfresh
Originally Posted By: CATERHAM
Originally Posted By: Skid
Who says 10W-30 is obsolete... much better flash and Noack numbers than the 5W-30.
It's obsolete for a number of reasons but primarily because the grade's no longer specified by car manufacturer's, replaced by the higher VI 5W-30.
The marginally higher FP and lower Noack is irrelevant.
Actually, there are still plenty of cars on the road that specify 10W-30...
My Miata does, but I'm going to use 5w30.