I had 4 gallons through mine and the main bearing went and made the piston rub. So I changed the main bearing right from the beginning, I will not go over a gallon with the stock bearing. When you take it apart the stock bearing looks cheap. I believe my v-spec is a 2006 because on another thread someone said that the 2006 v-spec has a silver backplate and the 2007 has a black backplate. I'm not sure, if you have the 2006 v-spec watch out for the bearing issue.