I'm as bad as Patman
This was my first batch of RedLine in my 02 Sentra 2L. I had wanted to keep it in for 7.5K. When the Mobil Drive Clean GF-4 came out I felt it my civic duty to be one of the first to do a UOA on it.
I had 2 quarts of the RL 5W-20 and 2 Quarts of 10W-30. As usual (for this vehicle) it used almost no oil (maybe a couple of ounces) and the fuel economy appeared to be up about .5mpg.
I went with the 5W-30 Drive clean and (couldn't resist it) one quart of the RedLine 5W-20. I plan on going 6K miles on this brew.

I had 2 quarts of the RL 5W-20 and 2 Quarts of 10W-30. As usual (for this vehicle) it used almost no oil (maybe a couple of ounces) and the fuel economy appeared to be up about .5mpg.
I went with the 5W-30 Drive clean and (couldn't resist it) one quart of the RedLine 5W-20. I plan on going 6K miles on this brew.