I have used 0W-40 on all 3 of my Vipers. Gen III, IV and V and have never had any issues. I have tracked them, driven them in 90+ temps and below 40(but rarely) I changed the oil once a year and put about 1,500 miles/year on the cars.
-
This reply was modified 6 months, 1 week ago by
V10Viper.
