As far as I know it, I am the highest mileage smart car in Michigan. I can honestly say, I have taken my car to the dealership for the maintenance. All the items the dealer check for me were needing replacement.
One thing I can say was after the maintanence, my smart car perform like the first day I got it. The cost for the dealership to do the work was very reasonable to me. The service was excellent.
You asked how did I get all those miles? Well, I travel over 132 miles to work roundtrip. I can tell you I average about 38 to 39 miles to the gallon . The most I have gotten on a single tank was 340 miles (approx 42 mpg heck yeah!!!). [I am still trying to beat the record on the internet for 350 miles on a single tank] I can tell you I do not see a difference in fuel economy if I am using the manual only or automatic only. The fuel economy only drops off if you are cruising higher than 77 miles per hour. My average cruising speed is 72 between 80 mpg on the highway. You can say I have a leadfoot.
I try not to fill my tank unless I achieve 300 miles on my trip odometer...
The smart car has been a wonderful commuter car for me and I would like to hear from others experience. I am curious of the avg mpg and most you have travel on a single tank. Plus, tell me how many miles you driven your smart car.
Keep on driving...