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Spitfire Road trip to help a friend last weekend with surprising results

sd80mac7204

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A buddy of mine, Matt, is in charge of the display room at the Western PA United Methodist Annual Conference, and this year he asked if I would help him out with setting up tables before and tear down a few days later. Took my Spitfire along for the ride and followed Matt for the 73 miles from Home to Grove City. Filled up with gas before I drove home and cruised on back, mostly keeping to the 55 mph speed limit with a several mile burst at 70+, playing with a Fiat 500. I parked the car back in the garage and left it sit for 4 days until I was called upon to go tear down. Stopped in Kittanning to fill up which was about 3.6 gallons before rolling north once again. Ended up inching my way back and forth through Grove City on an errand as well as sitting next to the road on my phone, idling for 10 min or so before stopping in Harrisonville for a top off. I had to have Matt come over to verify my tank was full after the pump kicked off... at 1.6 gallons. Averaged almost 36 mpg that day... Now I'm curious what the average would have been had I not gone through town or sat on the phone. Rough guess for the return trip on the first day is 31.4 mpg. Is this normal for a 1500 o/d Spitfire to be so thrifty?
 
sounds right to me. When I had the o/d trans in my 73. I would get around 30 mpg on a highway trip.
 
Our non-OD '72 Spitfire has a 1500, single SU HS4 carb, and slighly "sporty" exhaust. My son uses the car in mainly mixed driving, about 2/3 city, 1/3 secondary roads at 55 MPH. He averages about 27 MPG. Your numbers don't look bad to me and frankly... our car is 42 years old so I don't think our gas mileage is bad at all.
 
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