hey Cure actually the 30 in 5w30 is when it is cold. The oil gets thinner as it gets hotter. Thats why you have tons of oil pressure cold. I personally ran castol 20-50 in my trooper with a 2.8. When your wheelin you break oil down real quick. i use castrol 20-50 now in my Xj and love it. you do lose gas mileage so be advised. the 20-50 does slow things down since it is so thick. i seen a 2 mpg diff. in my daily driver going from 20-50 to 5-30 <img src="/forums/images/graemlins/confused.gif" alt="" />. oh well i dont daily drive my rig though so thats another factor to look at. <img src="/forums/images/graemlins/cheers.gif" alt="" />