I recently got an 03 Ram 1500 quad cab with 84000 miles on it. I have the previous owners service record, and a list of when the services should be performed on it in the future. My question is, The oil in the truck now is Mobil 1 Synthetic, and he was pushing the oil changes to 6k miles. Whats a good recommened interval with mobil 1?

I only ask cause 7 quarts of it is kinda expensive every if i do it every 3k miles

 

Thanks in advance also

 

6K should be fine. Depends a lot on how those miles are racked up. Highway is better than city. City mileage - you might want to shorten the interval. Oil gets dirty at the same rate, synthetic or conventional.

My '03 had 86K when I bought it in Aug. '07. The PO apparently used synthetic in it (found a receipt in the O/M). I use Pennzoil Hi-Mileage in it now, changed about every 4K (yearly ). Pennzoil Platinum is around $21 for a five-quart jug at Wally-World. Buy three and you're good for two oil changes.

 

Oh, and WELCOME! Guard your wallet.

 

6K on mobil 1 is cake walk. If he did that then that engine has been well treated.
Hemi engine is easy on oil. I've used M1 in wife's Caravan for 10-12K intervals for
ten years and that engine still runs great. I removed the valve cover this summer
and it was spotless inside.
I've been more conservative with my truck and doing 8K changes but I know 10K
would be no problem.

 

OP: The key factor to notice here is that he was using synthetic oil and not conventional oil.

Going 6k on dino oil is pushing it but not on synthetic

 

Thanks Guys, its a Big help.