- Dec 14, 2019
So we always have these oil debates and I posted on my Viper forums but didn't get any real detailed responses. So here is data with me having two different Dodge Viper TT cars with multiple different oils, T6, M1 15/50 and VR1 20/50 conventional. Love to hear your thoughts. I have read over and over on forums....15 or 20wt is so bad for a modern car and we shouldn't have to run a 50 wt unless our motor is built loose. I see that some newer Ferrari cars (LaFerrari, F12, 458 Speciale) run a Castrol Supercar 10w-60. So does that mean a Ferrari engine is built loose....I think not!!! Also, all Ford Performance vehicles run 5w/50. This oil thing is so confusing. I've had two different Viper Turbo car shops tell me to run VR1 20w/50 conventional. So in my stock Viper the T6 looks good. In the turbo cars it shears bad and breaks down. The M1 15w/50 does pretty good but by far the VR1 does the best. I read all the post of the recent "anyone still using 20w/50" and I have to say, it's not just for worn out motors.