Longest reported life of an engine
It depends on the engine that came stock. I bought one of the first Savages and it ran like a dog so after a gallon and no real improvement I tried a eight port but then I traded the eight port with the force 25 from My ofna buggy and I've been happier with both. The hyper 4 port that came in My Pirate is the engine I ran over six gals. thru so I guess I was happy with that one. My first generation T Maxx received a new Os 15 cv after a half gallon but still just sat untill recently when I installed that rebuilt Hyper 4 port and now I may run it some. The Pirate now has a Hyper 8 port. My EK-4 and Mad Force still have stock engines and I'm happy with both