[Vracer111]

~26mpg cruising on the highway means you need better control of your right foot and driving habits. The FR-S should easily get 30mpg average cruising @ 80-85mph...I can get 31mpg cruising @ 85mph on long trips between Texas and Utah in my MT FR-S... it's all about managing the throttle pedal and vehicle inertia/momentum...never slow down or brake unless absolutely needed, and don't use cruise control.

You need to be able to accelerate on downhill sections (while keeping above 30mpg average under acceleration) that lead to uphill sections..trading potential energy for the momentum to get you up the incline. And don't ever drop below 75mph going uphill...you loose that much rpm and it wastes a lot of fuel to get back to 80mph. I use the instantaneous mpg display as engine load indicator - you fine tune the pedal pressure to keep it reading as high as possible at all times.

Keeping between 80-95mph while cruising is the goal; ideally you don't want drop below 80 at any time when climbing - trading built up speed for the push to get you up the incline (you will need to sacrifice 10-15mph), maximize speed going downhill to buildup the necessary potential energy for the following uphill section, and stick to 85 when things are relatively level. Helps to have 80mph speed limit. It's a fun game to time it just right to have your speed drop bottom out at 80mph right when making apogee...and keeping the instantaneous mpg reading as high as possible under all conditions.


And I average 20-21mpg daily driving. All the mpg figures used are calculated based off distance and gallons used at the fuel pump...not what the car reads.