I guess that is a fair point, I mean if the most you save is a couple gallons/year then how much tinkering is that worth? You might want to measure current gph at high load and again at low load for starters and see what the potential return is (with a small graduated tank presumably). You need some benchmarks. Serious gains might be rather involved (i.e. fuel injection, electronic ignition, custom ECU (arduino can handle it), egr and throttle solenoids, etc).
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