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Thread: Gas Mileage?

  1. #1

    Question Gas Mileage?

    Can anyone tell me what kind of gas mileage I should expect from my supposedly properly tuned mechanically fuel injected '69S (2 ltr.) Coupe?



  2. #2
    B-b-buy Bushwood?!?!
    Join Date
    Feb 2003
    Topanga Canyon, CA
    My '69 911E (stock 2.0 w/MFI) gets between 12 and 15 MPG in mixed city/highway driving in L.A.
    Sandy Isaac
    '69 911E

  3. #3


    Hi Sandy, Hi Kurt

    Thanks for the replies.

    Well, those are radically different answers. I'm emailing from Toronto where everything is in kilometers and liters. I'm getting about 15.5 liters/100 kilometers. With the help of another '69 911S owner from the U.S. and our combined bad math skills I think I'm getting about 16 miles/gallon. I finally thought to check my owner's manual and it suggests 23.1 mpg. I'm assuming that's going to be optimistic.

    Kurt, all I can say is who's your mechanic and can he tune my engine?

    Anyone else out there with an opinion?


  4. #4
    Jared Rundell - Registered User JCR's Avatar
    Join Date
    Dec 2002
    Birmingham, MI
    Went on a local PCA drive today. Filled the tank before I left, filled it back up before I returned.

    98.4 miles, burned 5.8 gallons. That's a shade under 17mpg.

    My 2.4 has Webers and the drive was 70% HARD driving. I was hangin with the lead pack of 996es and Turbos - lot's of revs.

    I believe we did the early S world proud - as several took notice of the old school classic hangin with the big boys.

    BTW, I hit a Grand Canyon of a pothole REAL HARD - thought for sure I'd bent a rim or messed up the alignment. Not a scratch though, these old cars are tough! Something to be said for 70 series tires!
    '73 911S #0793
    '69 912_ #0602
    Early S #0454
    RGruppe #0391

  5. #5


    Thanks Jared

    Good to know I'm in the ball park.


  6. #6
    13-15 if you're lucky (and drive it!). These cars were never known for fuel economy; especially the MFI "S" models.

    Early S Registry #235
    rgruppe #111

  7. #7
    Poor gas mileage? Big Tank! Nascar boys are'nt the only ones who know how to cheat.

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    Early S Registry #235
    rgruppe #111

  8. #8
    Moderator Chuck Miller's Avatar
    Join Date
    Oct 2002
    Reseda, CA.
    I'm with you Tom...

    In 14 years... no better than 20mpg (that was a whole tank at the speed limit in 5th)

    13-16 around town ... 16-17 on the highway (if I'm luckly)

    And......... 9 on the track!!!!
    Chuck Miller
    Creative Advisor/Message Board Moderator - Early 911S Registry #109
    R Gruppe #88

    TYP901 #62
    '73S cpe #1099 - Matched # 2.7/9.5 RS spec rebuild
    '67 Malibu 327 spt cpe - Period 350 Rebuild

    98 Chevy S-10 Utility
    15 GTI Commuter

  9. #9
    My '69 w/2.7, Webers and E cams gets about 20 mpg on the road, but that's with the typical Porsche speedo that reads a little optimistic.


  10. #10
    Originally posted by Chuck Miller
    I'm with you Tom...

    In 14 years... no better than 20mpg (that was a whole tank at the speed limit in 5th)

    13-16 around town ... 16-17 on the highway (if I'm luckly)

    And......... 9 on the track!!!!
    Right on the money. Gas hogs to be sure. I think I've got an old Car and Driver reprint around here somewhere............hmmmm, yep, here it is: 14-17 mpg (1972 911-S), 15-18 on the "E" and 16-20 on the "T" .

    And so it goes: "your mileage may vary".

    Early S Registry #235
    rgruppe #111

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