Like Lance said the stockers scream also. Ive run alot of engines and to this date this is the best one Ive ever owned. Keeps up with the best, excellent run times. They just keep movin along. Ive run some of the higher end stuff and have never gotton more than 5 gals with out having to replace somthing. 6.5 gals. on this one and not a thing done to it except like I said in a earlier post cleaned the carbon off the top of the piston. Try one youll like it.