How are you figuring your gas mileage?

What is your odometer error (if any)?

Have you checked your odometer against a measured mile? A GPS will work but not super accurate. It will give you an idea.

Are you running aftermarket wheels and tires?

You need to figure your errors (if any). Then correct the MPG at the pump accordingly. If you do not, then it is "all for not" and based on assumption.

__________________
AJ

1985 300D (SOLD)