What type does everyone run, and how often do you change it? I'll have my truck tomorrow and will need to change the oil but I'm not too sure. I have heard nothing but praise and glory for Royal Purple, but alot of people say that it's not any better than something like Gastrol GTX. Your thoughts?

 

i used to run 3 quarts castrol gtx and 1 quart lucas oil stabilizer.. cant complain, but i switched over to amsoil 10w 30, full synthetic.. much better. engine is quieter and runs smoother. every little bit helps squeeze some more power out of the engine.

 

i use mobil 1 full synthetic in either the high mileage or truck/suv kind and its just as good as amsoil or royal purple for a little cheaper

 

I use Valvoline high milage synthetic blend. Royal Purple is a really good oil but you don't need to be running that in your daily driver.

 

My dad runs Pennz 5-30 in the hemi and I think my kota has Pennz 10-40.

 

Q torque power. 1qt lucas race, the thinner stuff.

 

Right now I have Mobil1 10W30 in it. Next change I will go to Amsoil 10W30. Since I don't put too many km's on the truck, once running Amsoil I'll change it once a year...

http://www.amsoil.com/storefront/atm.aspx

 

i use Mobil1 5w30 in my truck, change it every 5000 miles. I ues Royal Purple in my Procharged 89 Formula. I put about 500 miles a year on the car so i only change it once a year.

 

Isn't that a little thick. I though the 3.9 called for 10-30, thats what I put in my 3.9. Pennzoil 10-30

 

I'd have to check the sticker, but pretty sure it's 40. We run straight 40 and 10-50 in our dually with a 454 BBC, alternating every other change.