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Eff Your Prius: Tuning A C5 Corvette For 40 MPG Without Giving Up A Ton Of Power

Eff Your Prius: Tuning A C5 Corvette For 40 MPG Without Giving Up A Ton Of Power

Earlier this year, I made a vehicle purchase that up until this year, I had hoped to not do: I wound up buying a car for pure fuel economy and little else. And a little secret, readers: I wish I had done it sooner. You’ll be seeing a little bit more of the 2012 Chevy Cruze in a couple more stories coming up later on down the road…don’t worry, it’s not a major BangShift project car, just some tech stuff…but it’s mileage factor is not an issue. I regularly see 40MPG out of the little black sedan, and that’s with me rowing the gears with a six-speed, hauling gear, on the hills and dales and whatever else I happen to be driving on. It’s 148 horsepower isn’t going to light my fire, but it’s not god-awful. It’s a perfectly competent car that does exactly what Chevrolet promised. At least, for now.

But why did I wait so long? Because yours truly has consistently lived with the idea of “V8 Forever”. The Cruze is the first four-cylinder I’ve owned. I’ve only owned two V6-powered vehicles (2001 Buick Regal GS, 1999 Chevrolet Blazer three-door). Everything else has been V8 motivated. Fast? Depends on which one we’re talking about. Fun? Oh, hell yes. Fuel efficient? Eh…not so much. The 300C and the 2005 Mustang haven’t been too bad, but cars like the Imperial, the Mirada, the Comet, and the litany of Cutlasses all drank like a frat boy. But does that need to be the case?

A C5 Corvette is, right now, one of the best horsepower-per-dollar buys you can make. LS power, six-speed with the first application of the rear-mounted transaxle, and potent as hell. A 2002 Z51 is currently my high-water mark for ground speed (172 MPH +/- 2MPH) and is quite comfortable to ride in too. Fast, V8 noises, manual transmission…yeah, that sounds great to us. But what about MPG? The C7 Corvette has been able to touch 30 MPG if it goes into “Eco Mode”, but generally you’re looking at mid-twenties. Not bad for a V8 sports car, but can it be better?

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6 thoughts on “Eff Your Prius: Tuning A C5 Corvette For 40 MPG Without Giving Up A Ton Of Power

  1. Dayne Wilson

    Not if you retard ignition timing. Which would be controlled by knock sensors ,and basic tuning map.i know i also run 93 octane in my c5. It will never hit 40mpg im lucky to get 17mpg , but it is cammed. It also has full corsa exhaust x pipe high flow cats, callaway air intake , and aluminum flywheel. Not really built for mpg.

  2. Ben

    I don\’t see why not, mine is all stock with cats removed and air pump removed, and I can on good days hit 28, quite a few have hit 30, why not another 10 mpg

  3. Bryan

    My C5 gets over 30mpg on the interstate all the time. Best of 34.6 on a cruise from Birmingham to Chattanooga with my old Corvette Club.

  4. Arild Guldbrandsen

    We rented an 2017 Yukon XL with 355hp 5,3 last summer,and i got it up to 29,2 mpg on the computer on the highway down to New orleans in 55-60 mph.Shouldnt be so much trouble to get a vette there.

  5. Jim Bond

    I bought the EcoVette from Alex. $8800 on eBay. Case of drinking and bidding. But it’s legit. I got 39.3 coming back from Chicago to Nashville.

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