[splashz]

I just bought a used 135i convertible and I'm loving it so far. However I'm not getting great gas mileage. About 21mpg and I drive mostly highway (much of the time in traffic though). I'm considering bringing it in to a shop just to make sure everything is working efficiently.

Performance upgrades are nice but honestly, I'm pretty happy with the power of my car since I'm coming from a much less powerful car. I'd rather do something that will make my car more efficient and help with the gas mileage. Anything like that? I'm pretty new to modding cars but my buddy is into it and is willing to help me.