Hi all

I've notice quite a bit of difference in the gas mileage between my car (98E-320) and my sister's (99E-320) with the same V-6 engine. I have about 18-24 mpg while she has 23-30 mpg. Neither car has any engine mod nor any problem at all. I don't drive my car very hard either. Both cars have under 60,000 miles. The only thing that I notice is that my (98) car ride a little firmer - So what gives?

Thanks in advance
JeffreyP