I got the approval to mix Mobil1 and Redline 10w-30 oil from the guys over at Redline, Dave didnt see a problem with it. So its running in the car right now and I have to say it feels pretty good. For anyone who did not see my last post on this, I have a car that requires 3000 mile oil changes as the recommended interval. I know I dont have to adhere too strictly to the recommended interval but I want to keep good relations with my dealer in case of warranty issues. I'd love to run Redline 100% but every 3000 miles is a bit rich for my blood and I drive that much in about 6-7 weeks or so during warm months. I will run full Redline oil for my road course events, and in between Mobil1/Redline brew. I've got 3.5 quarts of Mobil1 with 1 quart of Redline 10w-30 to beef up the AW's. I figure this will give me about 150 ppms of moly and decent level of other adds which are heavily present in the Redline. Its a more affordable way for me to go with frequent changes. I'll try sampling at 3000 miles and see how she holds up. This is a turbocharged 4 cylinder engine. any opinions on this welcomed.