My lifetime average over about 5,500 miles is 25.1 mpg my calculations, 24.8 based on the car's calculations. Best tank so far is 27.1, worst is 22.6. City, highway, snow, rain, traffic jams, alone, with 3 people, loaded with cargo, pretty much every condition. I've been driving in everything but a sunny day. I have the sport ratio gearbox. I have not been on a track or driven faster than about 80 mph.
On a related note, however, I'm convinced that either the EPA's estimates are wrong or my car is not as efficient as others. In other cars, I consistently achieve
far higher
average mileage results than the EPA indicates even as their highway mileage. For example:
2005 Acura RL: 16 city, 24 highway, 19 combined. Mine:
28 average
1991 Lotus Elan: 21 city, 29 highway, 24 combined. Mine:
34 average
2006 Lotus Elise: 19 city, 27 highway, 22 combined. Mine:
33 average (31 after the SC)
-but-
2011 Lotus Evora: 18 city, 27 highway, 21 combined. Mine: 25 average
Yes, I know the EPA has changed their estimation scheme, and yes I know that 25 mpg average for a V6 sports car is excellent, but my point is that I cannot get any better in my Evora no matter how light I drive. The
very best I've seen is 30.1 mpg right after I reset the MPG-o-meter and basically rolled almost the whole 2 miles downhill in neutral from the gas station to my house. With cruise control on the highway - anywhere between 60 and 80 mph - it slooooowly creeps up to the 26's.
It's definitely not rolling resistance or dragging brakes. The car will roll unpowered for ages. I just put on the sport exhaust and it has slightly increased economy. My tires are great and the pressures are correct. I've observed the same mileage pattern on snow tires and summer tires. I use 91 octane fuel. I haven't even pushed the sport button yet and I drive like a nun (mostly

).
So what could it be? I know, you're going to just say "be happy with 25!" and don't get me wrong, I am happy and love the car. But something doesn't seem right given my past driving record and given that Ron achieved 33 mpg using cruise control. I can't even get that in neutral rolling downhill. Lotus' own published specs say that the CR gearbox gets 7.2 l/100km on the highway, which is 32.6 US mpg (39 imperial mpg). Does it just come down to each engine being different due to machining tolerances and the like? If there's a problem, I'd like to find it and correct it - not for the sake of mileage, but for the sake of longevity, performance, and reliability. I can't take it in to the dealer and say "my mileage is too low; I only get 25 mpg" - they'd laugh me away.
I'd like to hear anyone's thoughts/opinions/sanity checks.