S550 GT Premium MPGs

[sk8erord]

I'm about to clock 8k miles on my PP GT and I'm at 20.2 mpg. Granted, a big part of that was driving from Utah to Colorado and back and averaging 25-26mpg for that trip. Most tanks of mixed city/highway I'm around 19.

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[Hurricane]

Here's some data from the highway portion of a trip I made back from the coast today. I have the GT Premium with 6-speed, 3.31 gears and a 93 octane tune from Steeda. The car is lowered 1" and has the OEM 18" wheels with Pirelli Nero tires. Speed was around 77mph, mostly on cruise control. Roads were pretty much flat. Car was in Sport+ driving mode. I jumped on the highway immediately after topping off the tank. I've also made this same trip to and from the coast back before I got the tune and the MPGs were pretty much the same.

FWIW, in normal daily driving conditions going to work, the grocery store, etc. I average about 19mpg. This is also in Sport+ mode.