Yes, I cruise down the road at 3000rpm and it does eat lots of fuel. I would say about 10mpg. I dont think that combo would be kind to you with overdrive. The trick to the street Dominator is the 2 circuit air bleed setup. I drove a 3 circuit on the street for a bit but it was a tuning nightmare. It was too lean and too rich in certain areas. Ran a 90 inter bleed to drive it, but was not ideal. A 2 circuit is what you want. It is a very fun car to drive to say the least.