[Jo Anna]

Sooo, here's an ineveitable question: What kind of mileage can I expect from my 72 GT? What kind of mileage are you all getting?
Jo

 

[jlthunder]

With a standard 4 speed, I get about 24-25 mpg with mixed driving.

 

[wrangler]

My '71 4spd gets 25 as well. All local city driving.

 

[nobody]

My GT gets around 15 to 18 MPG.

 

[BigGMan]

25 seems to be consistant..I get between 25 and 26.

 

[baz]

i used to get 29 in town and 40 on a motorway/interstate but we have a bit less than a pint more in our gallon so around 26 for a us gall would be right

 

[73Manta72gt]

My 72 Gt with a 32/36 weber get 34mgh, my 73 manta gets 30.8mph on the interstate

 

[rockytopmark]

My Former 72 GT with Auto got 28 MPG on the interstate. No clue what my current car gets, speedo not workin.

 

[greensmurf20]

my 71 GT gets 24-26 on country roads, 32-33 on freeways. manta gets 18 in the country and 22 on freeway.

 

[kwilford]

I made it into a real poll. Keep it simple, just pick one...

 

[opelgt73]

My last "Restoration Complete" GT got between 35-40 on the highway, and 22-27 around town, which I thought was incredible. It was a 2.0L High Compression with medium lift cam, 32/36 Webber, sprint exhaust, electronic ignition. But I think what really got the gas mileage up there was the Getrag 5 speed. That and I am fairly light footed with the gas.

There was a thread about increasing MPG. I would think an electric fan, maybe even an electric water pump would bump those figures up slightly more.

 

[jrichar3]

I get 22mpg every time I fill and that is mostly highway driving.

 

[bozkm]

I get about 25/26 everytime I fillup. I normally only drive to work...60mph, no lights or stopping, 12 miles one way. I'm also at 7000ft above sea level if that makes a difference.

 

[BDD]

I think that I used to get a reliable 33 mpg with my 1970 gt back in the 70's. The highway speeds might have been 55 back then. I'm sure it wasn't in the 20's.

 

[Betta Carotene]

With my 73 Gt I get about 25 a gallon. This is with a Flat top 2.0, hotter cam, 4 speed and SSD 40dcoe

 

[kent]

Back in the early 80s I had a 71 that got low 30s but it was a dog. I have a 69 now that gets 23-26 but has a lot more go.

 

[Jo Anna]

thanks

Thanks for the info--now I can set my expectations. Keith, turns out the explanations had some interest and thanks for setting up the simple poll as well.
jo

 

[neuropel]

If you do a lot of highway driving, a getrag 5 speed can start to pay for itself with today's gas prices. When I installed a getrag in my GT I recall my highway mileage went WAYY up from where it was with the 4 speed. Not that you need any more ammo to warrant buying a 5 spd, right?

 

[Jo Anna]

5 speed, hmmmm. I've noticed, since I'm used to my Impreza 2.5 RS 5 speed, I' wanting to go to 5th gear in the GT when the RPM's sound right. Funny how we get used to things--also notice big diff in the range of motion in the shift pattern for shifter--RS is a tight pattern, GT more horizontal and wide. OUr bodies get used to kinesthetic dimensions without us even being aware of it!
Jo

 

[tekenaar]

My '73 1.9 FI GT with bigger valves, Isky cam, Norris springs and keepers, Sprint into 2" exhaust with 2" turbo muffler and gutted stock resonator, 4-speed and 3.44 gear gets ~28-29mpg around town and ~33-34mpg highway on regular unleaded.

My completely stock, flat-top 1.9 '69 Kadett LS with automatic and 3.18 gear gets better than 24mpg averaging ~85mph on highway . . . 3,000 mile roundtrip to Carlisle followed by 600 mile roundtrip to San Antonio three weeks later, all on regular unleaded. Ran best on BP gas. This is not the most aerodynamic of Opels, as most of you know.

My '72 GT with 1.9E engine, SSD 40DHLA, header into 2" exhaust, Getrag and 3.44 gear got 28+mpg at 87mph highway average on a trip to Houston and back, ~600 miles, several years ago. Still gets great mileage with 10.5:1CR 2.15 engine, Bob's cam and 2.2 valves in 1.9 head and SSD 48DHLA (Dell'Orto), just haven't checked exactly what, but still runs on regular unleaded!