I run Mobile 1 or T6 5W30in my jeep, Rotella T6 5W30 in my powerstroke.
The synthetics have better additive packs to deal with going on longer change intervals. when I owned and drove big trucks (WL900, 387 pete, 379 pete, FLD 120 etc) I ran full synthetics and pulled an oil analysis at the recommended oil service interval and only changed it when it was needed. My Cat engines could go longer between changes (like 200,000 + miles) with simply changing the filters and topping off with fresh oil.
Lubrication technology has come a very long ways since even '93 which is when my YJ was born. Check out www.bobistheoilguy.com
it is the JF of the oil world and has tribologists and real honest to goodness scientists that have fact based reviews and citations for there positions, not "well this is why I feel this is the best".
You'l likely never run another Fram oil filter after visiting that place....
"Axeheads are supposed to be sharp, but you are one blunt tool."
If you love wealth more than liberty,the tranquility of servitude more than the animating contest of freedom, go home from us in peace. We seek not your counsel nor your arms. Crouch down and lick the hand that feeds you. May your chains sit lightly on your shoulders and may posterity forget that you were our countrymen.
A government big enough to give you everything you want is big enough to take everything you have.
Calling Illegal Aliens "Undocumented Immigrants" is like calling drug dealers "Unlicensed Pharmacists"
Nemo Me Impune Lacessit
"No one provokes (attacks) me with impunity".
"Your right, the Tea Party and the OWS are the same, just like the America Revolution and the French Revolution were the same. The only problem is the American Revolution ended with Liberty, Freedom, Justice for all and a shining light upon a hill. The French Revolution ended with lynchings, guillotines, murder and socialism. So yeah, I could see how one could confuse the two..."