Cheap alternative to pricey flat tappet oil in street cars...

Good to know on fuel inj. engines. I doubt I hurt anything. I know that the Scamp's cam bit the dust because of it's age and carb + no phosphorus.

The only thing that made me nervous is that in a lot of the jeep forums, lifter wear and ticking lifters are becoming a more common problem with the 4.0L.

be careful with the break in additives. If they treat an entire pan of oil to break-in zinc and phosphorus levels, they are sky high and can actually rust the block from the galvanic properties of the zinc. 1400ppm of zinc is right where you want to be.

I've never heard of the Lucas classic car oil. What does that run you?