[KoolBRZ]

I just got back from a marathon, (24 hours), of driving, (with rest stops), between Vancouver, WA. and Rio Vista, CA. Bringing my mother-in-law, and all her stuff, to her new place. Because I was driving my mother-in-law's 2011 Corolla,which was towing the trailer, most of the time my wife drove my BRZ. As anyone from CA knows, the maximum legal speed towing a trailer is 55mph, so that's what we set our cruise controls for. By the time we filled up outside Sacramento, she had averaged 42.1 MPG in my BRZ, on cheap Cali premium.

This is a car with an unrestricted exhaust, a Phantom Electric Supercharger under the hood, running a PROcede map that boosts at anything over 1200 rpm's, if anything, this should cause it to use more fuel. It's just simple math. More air requires more fuel, right? This average mpg means it was making more power. Enough power to average 42 mpg. I even made 40.5 average mpg towing the empty trailer.

There was one other big change to my 40-20 tune. It was finally making enough power that the OEM Drive-By-Wire throttle table for AT's was causing it to lunge from a dead stop, so I switched to an OEM MT throttle table to make to easier for my wife to drive. The MT throttle table has more of a straight rate then the AT table, but less power at initial launch.

My car has never run this smoothly. Every shift, up or down, it never bogged or surged. The cruise control shifted as necessary to climb the steepest grades with ease, and even downshifted as low as 4th gear automatically to use engine braking on the descents.

This 40-20 tune is all about drive-ability, not peak horsepower on a dyno. I think this latest marathon of driving has proven it's a much better driving tune than the OEM tune, and even better than a lot of off-the-shelf tunes.