So i got arch oil fuel additive 6200. Proceeded to put it in my m3.......and WOW!. After about 10 k, amazing throttle response, it was like my car was on sport mode....where less application means more output. Let me tell you i put it in sport mode.....could not keep the tires planted!!!! lol. I have never seen anything work like this, simply amazing. I double dosed first treatment....they say to do that. And a little goes a long way..i think 1 ml treats 10 litres of fuel. I got the 9100 friction modifier as well, will be putting that in soon. If it works anything like the fuel modifier......WE ARE IN BUSINESS!!!