That's what I'm hoping for. I'm only seeing about 6 minutes out of my .28 right now. The carb inserts are on their way so I'll get to test those out and also I'm going to play with different clutch bells and spur gears. When the .28 dies I was hoping to replace it with a .25 and be able to get roughly 9 or 10 minutes out of it. If I can see 8 minute tanks with the .28 on my track I'd be really happy.