Wally, what grade of Royal Purple is it?

On that Northern Auto site, they have 15w40 automotive for 4.99 per quart.
They also have, under their racing oil link, a marine and oval track oil for 7.99 per quart.

Which do we need?

Contact Tres Martin @ Martin Offshore, he is the guru of Royal Purple. I have used it and I think it's awesome.

KAAMA, What's up bud? Love the stuff!

I use Royal Purple also.

Boat gets 75w90 in OD. Racing 41 in the engine.

Jeep gets 10w40, ATF, 75w90.

PowerStoke gets ATF in trans and t/c, 75w90 in the difs and I haven't decided on the engine. 13 qts every 2-2.5 months? ford-diesel.com guys are undecided also since frequent oil changes keep the PSD alive. Any thoughts?

Scott

Payton.....its for auto oil. any grade i want from 5w-30 to 20w-50
I'm just looking for something as good as Redline for a little cheaper... i realy dont need anything fancy in my Jeep but hell, for a good price i might as well! :D

JUST PUT SOME MOBILE ONE IN IT ITS OVERKILL ! AND CAN BE BOUGHT ABOUT ANY PARTS HOUSE AND EXXON STORE
IT COMES IN NEW VETTES,ECT, AND AGAIN EASY TO GET :D :D