I have been deciding which oil to use? The last few changes i used quaker state 4x4&SUV but somehow the forumla has been changed. Just open opinions welcomed.

 

Mobil 1 !!!

 

Amsoil. My truck had over 100,000 miles on it when I switched to synetheic and not a drop has leaked out. And it actually made the motor run noticably better.

 

Agreed

 

I have only had my truck for 1 oil change and used regular Castrol 10w40. I am debating a change to synthetic. I have no idea what was used in it for the first 118k miles.

 

Amsoil by far,I wont put anything but Amsoil in my toys

 

I've used Mobil Clean 5000 10W-30 (and one change with 5W-30) since I bought my truck with 86,000 miles until last oil change which was 102,000 miles and was happy with that dyno oil.
At 102,000 I switched to Mobil 1 5W-30, and so far have about 1,500 miles without any oil loss.
I would vote for Mobil 1.

 

Mobil 1 and Mobil 1 oil filter. there is no better, guy ran it in his camaro from day one, after 120K he decieded to put a H/C package on his Lt1, the cross hatches were still in the cylinder wall amd mever burned nor loss a drop of oil

 

mobile 1

 

I've been running good 'ol Castrol 10/30 in my ram since the day I bought it, with just a squirt of hyperlube for good measure. In my 30 plus years of driving nearly more than 2 dozen Mopars of every shape and size, I have yet to see any long term benefit from running a synthetic oil. Don't be fooled by marketing, "dyno tests"or endorsements from well paid celebrities and racers. You really can pay too much!

http://www.v8performance.com/tipsandtricks.htm#OilRec