Zero Weight Project

We are midway through the summer and the RX8 mileage continues to be about the same.  The last tank covered 247 miles using about 13.9 gallons of premium gas.
Driving was a mix of city and highway driving with most of the driving done on the surface streets near my home and work.  I am now [...]

It has been a little while since I updated my fuel mileage thread.  I decided to do a recap of my fuel economy so far.  It seems that since the new motor, the overall mileage has slightly improved.  However, the improvement is not significant.  The last half tank was approaching 20MPG was a highway only [...]

My recent tank is not so great.  Except for the last 50 miles, it was all city driving.  Below are the results.  It is amazing how bad it can be.  Not the absolute worst, but not that far off.
Next week I am organizing a Dyno Day.  So I am sure the mileage will be low.
Fuel [...]

I just got back from a trip to Indianapolis. It is about 110 miles one way. I as able to eek out an surprising 274.5 miles out of the RX8 tank. With over 70% of highway driving, the RX8 finally exceeded 20 MPG. (Just barely)
The outbound trip was in total darkness with an average a [...]

One aspect of performance improvements is the effect on fuel economy. In some cases, increased air flow, reduced unsprung and reciprocal weight can have a positive impact how much gas you use. For the Zero Weight Project, i decided to document the MPG and see if there was any change at all. The first [...]