Oil Weight

What oil weight and type of oul do you guys use in your 340 and 360's? Multi weight single grade? Synthetic or conventional. I am especially interested in flat tappet cam oils choices! :popcorn::steering:


Never run a single grade oil. Don't do it.

Buy the best oil you can afford. I gladly pay 24.00 a quart. My cam, lifters and rings love me for it.