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#1
04-07-2016, 05:58 PM
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gas milage
so i bought a 64 tempest wagon 326 2 bbl, 2 speed auto,guessing 2.?? . thinking of using it as a daily driver till i get my 421 rebuilt. whatcould i expect for gas mileage ?.....just curious
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64 tempest wagon 421 gasser 
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#2
04-07-2016, 07:36 PM
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14 in the city, 17 on the highway.
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BONESTOCK GOATS '64 GTO Tripower Hardtop (Wife's Car) '64 GTO Tripower Post Coupe (My Car) '99 Bonneville SE Sedan |
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#3
04-12-2016, 12:05 AM
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my 64 lemans 2 spd auto with highwat limited slip gears gets 20 mpg with 2 barrel rochester on summer highway drives..around town is about 15mpg
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#4
04-12-2016, 08:26 AM
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mine is a 326 2sp 256 gear and what Dick said is pretty accurate. I have gotten as good as 20mpg.
I hope to put in a 068 400 with a th350 to double the hp and still have the same mpg. |
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#5
04-12-2016, 12:51 PM
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Back in 1971 thru 73 I ran my 66 Tempest Custom from Massena, NY to Rochester, NY the opposite when worked at Eastman Kodak. 326 non HO engine, 4bbl, 2peed ST-300... rear gearing unknown but was probably 256. I averaged very close to 25mpg every trip back and forth. No lie as I kept track of the gallons used and mileage driven. My parents taught me that, as they did it with their Pontiacs. It was always about 10 gallons one way for 249 miles... house to house.
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 Gary Get in, ShuT Up, Hang On! Member of the Baltimore Built Brotherhood MY GTO built 4th Week of March 1966 "Crusin' Is Not A Crime" Keep yer stick on the ice. |
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#6
04-17-2016, 05:01 PM
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My '67 GTO ragtop with stock Q-jet and 9.3:1 400 gets about 21 mpg at 75-80 mph with a TH400 and a 2.56 posi out back. In town not so much. Your wagon probably has a 2.56 or 2.78 gear....keep your foot out of it and I'll bet you can close in on 20 mpg hiway!
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Jeff 
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#7
05-05-2016, 12:27 AM
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My second 64 lemans that I owned had the original 326 two barrel two speed and 2:56 gear got around 23 mpg on the freeway.
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#8
05-05-2016, 02:47 PM
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WD, remember..... gas is not the same today as it was back in the 60s and 70s. This E10 crap will not give you the gas mileage real gasoline did back then. Today you will lose 3 to 4 mpg with this E10 compared to gas back then.
And if E15 comes along to replace E10, DO NOT use it at all in a classic car engine. Auto manufacturers will void warranties on todays new cars if it's used in them. And yes, States are selling E15 today. Read this from Snopes.... http://www.snopes.com/politics/gasoline/e15.asp
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Gary Get in, ShuT Up, Hang On! Member of the Baltimore Built Brotherhood MY GTO built 4th Week of March 1966 "Crusin' Is Not A Crime" Keep yer stick on the ice. |
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#9
05-05-2016, 09:14 PM
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Quote:
E85 only drops fuel mileage by about 30%. |
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