Hi,
Over a 400 miles mostly highway trip I took two weeks ago, I averaged only about 23MPG and change. This was at an average speed of about 70 MPH. This seems kind of off doesn't it? What could be causing it? Power seems ok, it starts great, and there is relatively little smoke on hard acceleration. Is it time to change my filters? Does my IP need timing? Do I need to change my timing chain? Replace my injectors? I have some money to throw around this summer (not a terrible amount) and it'd be nice to get my car running as good as possible.

Alex

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1983 300D (parked for four years)
2012 VW Sportwagen TDI Manual
2001 Miata SE
1962 Chevrolet Corvair Rampside