5w30 weight it to thin if you're going to beat your truck, specialy 5.7 hemi..
even in some of those manual u find in pep boy, murray etc. states not to use 5w30
for any kind of high speed or high rpm driving. use 5w30 for winter only and 10w30
4 the summer or when u know u going to beat ur truck!!!!!!!!!!!

 

My '05 requires 5W20, but I'll be putting in Amsoil 0W30 at my next oil change (currently has synthetic in it now).

Derek

 

Has any tried royal purple? Royal Purple

 

yup mobil one is the best i realized it a couple years back when i used in my bike the bike always shifted good but when i switched to mobil 1 it went into gears like butter no effort at all great stuff if it works that good in a bike and you can actually feel the difference its gotta be good in the hemis

 

 

Just switched to synthetic, now that I hit 15K miles.

 

I run Valvoline 5W30 in my 2004 hemi, and I love it. I use my truck for work, hauling and pulling alot, and idling alot in dusty conditions (road construction) I don't use synthetic because I like changing my oil every 3000 or 4000 miles because of the dusty conditions, and I can't afford to use synthetic and change oil every month and a half or 2 months.

 

Mobil 1. Good price at Wally World.

 

Exactly what I use. It was on sale for $20.xx the other day (5qt jug) and I picked up enough for this last oil change. Should have picked up more.

 

i run royal purple 5w20 and have been very pleased with it. as far as not being able to go back to regular oil after using synthetic , that is not true , after all syntec blend is a mix between oil and synthetic.