I have a slightly modified 360 Magnum motor, 400 HP on the dyno. It is basicaly a street cruiser with an occasional trip to the track. What type oil do you guys recommend. I am about to change the oil for the first time since it was built. The builder used Royal Purple to break in the motor and on the dyno. It is now time to change the oil.

Thanks,


My car 74 Duster mild 360/904/3.91 13.44/101.54 Son's car 75 Dart Sport 318/904/4.10 looking for a 360 or 408 2004 Dodge Ram 1500 Laramie 5.7 2010 Dodge Challenger R/T Classic B-5 6 speed 2010 Jeep SRT8 for the little wife