Like to say this board is full of info!! Now to my question.... I have a 3.1 chevy V6 that has always used oil since brand spankin new. Currently at 45,000 miles it uses 1qt/1000 miles with Mobil 1 10W-30 and the same with Mobil Drive clean. I have since been adding Mobil 0W-40 to top off the dipstick and I have noticed a decrease in consuption. When I do take long highway trips(500+ Miles long) I have to add maybe 2 quarts to keep it at full level. I would rather find a dino oil(cheaper than Mobil 1) that will help cut my consumption rate since I change my oil every 3,000 miles no matter what. I have heard good things about cheveron supreme(VERY CHEAP). What do you guys suggest??