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Thread: Series III gas mileage?

  1. #1
    Join Date
    Feb 2016
    Location
    Little Compton RI
    Posts
    22

    Default Series III gas mileage?

    Hi everyone. With gas prices these days, anyone have any tips on ways to improve gas mileage on a '73 Series III (besides not driving it!)? Thanks!

  2. #2

    Default

    What is your carburetor? Distributor? Knowing that wil help us help U. Thanks

  3. #3
    Join Date
    Dec 2010
    Posts
    286

    Default

    I've been running a wore out rottenchester for years and recently put a new weber on (compliments of our host) and I'm here to say i'd bet I'm buring nearly HALF the fuel I use to without much difference in performance, but then, my series 3 has about 3/4 million miles on it with one amateur rebuild when it had less than 30K on it .. ........ pretty messed up huh? .......... i haven't measured the mileage but i can drive it to town (15 miles RT) and all around the ranch for maybe 2 weeks with no prob.

  4. #4
    Join Date
    Dec 2010
    Posts
    286

    Default

    standard distributor, points, original stuff. go to town maybe 2-3 x per week.

  5. #5
    Join Date
    Jul 2020
    Location
    UK
    Posts
    197

    Default

    With a new S3 here in the UK , the best fuel consumption was about 20 mpg (US) general 15 mpg and the worst 2 mpg (off roading) . That was with totally standard vehicle and setting .

  6. #6
    Join Date
    Sep 2010
    Location
    killingworth CT
    Posts
    825

    Default

    You can use Physics to your advantage, run Tall road tires, and increase the PSI about 5-8 PSI, helps a bit.

  7. #7
    Join Date
    Dec 2010
    Posts
    286

    Default

    Quote Originally Posted by cedryck View Post
    You can use Physics to your advantage, run Tall road tires, and increase the PSI about 5-8 PSI, helps a bit.
    right, I put 16" tires on. made a big difference but I run them at 29 or 30 psi. or it rides like a buck board!

  8. #8

    Default

    1 possibility is that your engine is very tired after 200k+ miles. Have u checked your compressions recently? Some old rover engines actually run pretty well when they're half dead.

  9. #9
    Join Date
    Nov 2021
    Location
    Niagara
    Posts
    25

    Default

    My engine is tired (90-110psi per cylinder) and I get about 175km/tank (single regular tank). Pretty bad, but it starts every time and still pulls like a horse. I have an aftermarket Zenith and electronic ignition. I am running on the rich side to keep it cool in the summer months.
    Last edited by biffidum; 07-02-2022 at 11:38 AM.

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