what oil does everyone use? and a few more ?s

[HISS]

Royal Purple 5w30

 

[NorCal SRT-10]

Some of the clatter your hearing might be injector noise. Nothing will affect that.

Our trucks use a special Mopar antifreeze available at the dealer or I just found out about this:
http://www.valvoline.com/pages/products/product_detail.asp?product=10

It's been said that it isn't good to mix different types of antifreeze because it can become caustic to your system and cause corrosion.

Thanks for the heads up. I knew it had to have something special for the aluminum. I know Dex Cool does it for GM, but I had no idea what Mopar runs.