Redline..Great stuff. Just had a engine in a race car rebuilt and the engine builder Tony Otto Jr insisted I use Redline. Apparently he even worked with them in testing oils in race engines. At the track the oil temp and pressure stayed very consistent. The engine was new and first time out you really pay attention to that stuff and all was well. The other day I toured the Redline facility where they make the stuff and had things explained to me that I will probably never understand. I'm sold on it. Nice folks.