WebGuyNJ

I am sure this is an odd topic for a sports coupe. I am sure I'll get flamed too, but I have to ask if anyone else (especially commuters) tries to drive their C classes for high fuel efficiency.

For me its kind of like a contest against myselft to get better mileage and higher average speeds every day.

Today on my 34 mile commute I managed to average 72MPH at 35.2 MPG. D*m,n I love this car.

No my commute is not all downhill. I have gotten well over 32MPG in both directions in the past

My last car a VW TDI averaged 45.3 MPG over the entire 60K miles that I put on it. So far my Coupe has averaged 28.5.

I keep a journal in my glove box of all costs on the car and document all the data from the trip computer on each refil or other maintenance stop. Does anyone else do this?

SoCal240/6

Its a true economy car.

Buellwinkle

When the ecu was set to 91 octane I got as high as 38 at 72mph. Now that it's back to base I'm back to a mundane 33. The sacarafices I make for power.

c230coupe

I get 32mpg at 70... with 5000~ miles so far. I am expecting better mileage after my first service.

Have you noticed any difference between calcuated mileage (miles/gallons) vs. the trip computer?

c230 fi addict

i got 30mpg the other day...

ohhh i thought i had 500miles to the tank as a matter of fact but i had set my car to km/hour boohoo only 425 miles per tank that time hehehehe (about, i didnt run out of gas to tell)

TimmyC230boy

i only get around 24mpg to work. But its about 4 miles and half of it a little backroad full of twisties. I can't resist it.

Mike T.

Well, at a steady 90 km/h I've managed 41.5 MPG US, or 5.7 L/100 km. The fuel economy of this car is phenomenal on the open road. Less so in urban traffic.

mdp c230k

The highest I've seen in my car is 35mpg over a 10 mile flat stretch at 80mph. The lowest I've seen is 9.2mpg over the 1.2 miles to work hitting every light and juicing it hard between lights!

session

the highest MPG ratio i've seen on my car is 33.1mpg. i usually get around 19mpg -- damned northern virginia traffic.

Apollo

I've had my car 2 weeks now and average mpg for 1600 miles is 37mpg, not bad for a brand new engine.

trench

Yeah, the trip computer isn't particularly accurate. It tends to compute better mileage than the calculated (miles covered/gallons added at fill-up) number.

My last three fill-ups, computer vs. calculated
24.6 - 23.6
23.7 - 22.8
23.8 - 22.6

Your mileage may vary (literally ), BT

MB-BOB

I agree with trench. My home Excel spreadsheet (miles covered/gallons added... tank over tank, 5-tank avg, and 10-tank avg) also computes less mileage than the onboard computer.