RV Fuel Issues & Prices - Post 'Em Here!

Getting the last bit of horsepower out of an engine devolves down to the weight to power ratio. But maybe we thought about the problem backwards. I had the opportunity to work on a Mercedes touring sedan, built in the late '50's. I was told it was the first commercially available engine with fuel injection. The big inline six pulled a chassis weight in excess of 6,000 lbs. The owner commuted in this car a distance of 30 mi, one way, with three passengers. He swore that the vehicle got 30 mi./gal..