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

Amsoil is good stuff. So is Redline and Brad Penn, if you don't mind the price.

I'd love to rollerize my Jeep, but again, I can't seem to find a roller cam and lifter set for a 4.0 anywhere and I'm beginning to wonder if there is no room for a lifter link in the engine.

I think Brad Penn's Penn Grade 1 runs about $8 per quart. Going with conventional crude base stock store brand oil and a quart of the Lucas, puts my change at $24+ filter, which is right about half of the cost of running Bradd Penn's stuff.

I think I'm going to experiment with some Mobil 1 in the winter and use a quart of 5w30 in it, to trim down on the SAE30w viscosity, of the Lucas. Oil pressure is slightly elevated.