i know its the best for the hemi so im going to switch to it in my 04 1500 im comming up on 33k so im thinking of mobil 1 pure synthetic 5w 30. anyone running this stuff?? its the same price as royal purple so any of the 2 will work just wanting your opinions. also i was just amazed that the 5.7l hemi takes 7 quarts wow !!!

 

i swithched mine 1,000 miles back with 32,000 on the truck to royal purple 5w-20 but mine has since used a quart, and i am 100% positive it was full but i seem to be the only with this problem

 

any inprovements with the synthetic?

 

gas mileage up about 1.5, hemi tick is still there though

 

I have the 4.7, regretfully I had to switch back to conventional, I was using the Mobil1 full syn and lost 2-3 mpg in the city and a steady 3 on the highway. I tried three different times with the same results. I'm sticking with the Valvoline I'm running now. I'm back up to 18-19 mpg in the city and 23-25 hwy.

 

good god man thats good gas milelage im only getting 9-10 city and maby 13 on hwy

 

I ran Mobil 1 for 15+ years and recently switched to Royal Purple in my Grand Cherokee 4x4 and the Ram. Both experienced a 1.5-2 mpg increase with the RP! And ramhunter, you need to do something, I'm running a heavy suspension lift, 35" tires and weigh in at close to 7000 lbs. with winch, grille guards, etc. and get about 13 city and close to 16.5 on hwy, and that's with 4.56 gears...

 

what would you recomend i do??? clean egr , throtle body ect??? she only has 33k on her i no something is wrong when my single cab is getting this bad of mpg's

 

Should have had a full tune up at 30k, did you do one?

 

Take it out of low gear
Seriously, try new plugs as mentioned and maybe even reset the PCM.