In Reply to: Mileage Per Gallon? 97 Z3 2.8 posted by Chris on June 08, 1999 at 15:44:46:
I drive my 2.8 daily, mostly around town, with occasional trips onto the highway, and I've got a trip computer, so I may have more perspective than some of the suburban "occasional use" types.
I've found that mileage varies HUGELY. On the highway at a steady 60 mph & top up, the car will get almost 30 mpg. If you're doing 70-80 (especially with the top down), mileage drops off to 25/26. Also, headwinds (and even crosswinds) can cut highway mileage down to the 23 range.
It's a great looking car, but with a .41 drag coefficient, it's not very aerodynamically efficient. (And I would imagine that my great big fat 17" wheels & tires don't help either).
In easy mixed driving around town, I generally get 19/20, but this assumes that traffic is moving along well & that you aren't hitting many red lights.
In the city center, with stop lights almost every block, I'm lucky to get out of the low teens, even in light traffic. In heavy traffic, or if you use lots of throttle, it's entirely possible to drop into the single digits.
Overall, the 2.8's not a terrible gas guzzler for a sports car. But at full throttle it really sucks down the gas, and at high speeds its aerodynamics hurt mileage. Overall, mileage isn't really a problem, as long as you aren't expecting the thing to be an economy car. Besides, considering how many people buy great hulking TRUCKS to use as daily drivers, I don't think we have too much to apologize for with our little cars. ;-)
But the gas tank isn't huge, so you'll find yourself putting in gas quite often, especially if you use the thing as a daily driver.