Ok fellas. A little testimonial time here. Just wanted to share a recent experience with my team car. It ran in the June race and sat in the box for probably 6 weeks or so when it was returned home. I took it out to prep it for the September race and gave it a couple runs down my track. It ran a 2.975 average for just a couple quick runs right out of the box. I then prepped it using a competitors oil...Same process that I always use and the best I could get was a 2.983. I then tore it all apart and prepped again with the DD4H oil and after a few break in runs, it ran as fast as 2.963. I'm glad I had the opportunity to try the other stuff, but Johns oil works best for me.