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Whats your MPG's?

Discussion in 'L: Horizon/Omni, Rampage, etc' started by 88horizon5speed, May 26, 2014.

  1. 88horizon5speed

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    Driving about 80% highway with another 10% of bumper to bumper traffic and 10% around town I get between 35.2 to 36.5 MPG. The best ive gotten is 38.5 driving about 95% highway with no traffic. Im curious to see how well others are getting. I fill my tank up to the top and reset my trip meter everytime I fill up. And I divide the miles I drove by the gas I put in everytime and I am consistent at around 36MPG.

    My car is a 88 horizon 2.2 TBI NA with the 5 speed

    what are you guys getting?
     
  2. stew1927

    stew1927 Member

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    My 2014 Grand Caravan with 3.6L and 6 speed trans ,gives me 34 mpg at legal speeds on highway. About 10 less in city driving.
     
  3. Bob Lincoln

    Bob Lincoln "CHECK FAULT CODES"
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    93 Daytona with 2.5L TBI and 5-speed averages 32 mpg highway at 65 mph. My 92 Daytona got 34 mpg, same drivetrain (but no 10% ethanol then).
     
  4. floridaman2013

    floridaman2013 Active Member

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    Our 2014 JGC 3.6 2WD gets about 27.5 on highway, 21-22 around town.
     
  5. 88horizon5speed

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    I forgot to mention I use 87 gas. I dont drive for economy, just how I normally would. 65-70 mph on the highway, and I shift at about 2500-3000 accelerating (except I shift into second at about 1800)
     
  6. Guido Anchovy

    Guido Anchovy New Member

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    In my 1987 Horizon with the 3-speed auto I get around 22-25 mpg.
     
  7. 88horizon5speed

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    So I realized that the metal hose for the smog pump broke where it connects to the cat. Before that broke I was getting the 36's. Then it blew and I got 38.5 and I just filled up (its not fixed yet) and I drove 309.3 miles on 7.801 gallons which is 39.648 mpg. Is it bad to leave it disconnected? Its getting such great mileage that I dont want to connect it if I dont have too lol
     
  8. Bob Lincoln

    Bob Lincoln "CHECK FAULT CODES"
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    Crimp it shut so that you don't have an exhaust leak and carbon monoxide danger.
     
  9. floridaman2013

    floridaman2013 Active Member

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    If your not using the air pump system, do as Bob says as that was for the catalytic converter to get enough oxygen to help the converter's heating process. A lot of those cars that used the air pump system would fail emissions testing since the converter would shut down without the fresh oxygen pumping into them but I think you mentioned before you weren't using the air pump?
     
  10. 88horizon5speed

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    The hose that goes into the cat broke at the entrance to the cat. So right now its left as is. Does it help cool the cat? or is it just to introduce clean air?
     
  11. Bob Lincoln

    Bob Lincoln "CHECK FAULT CODES"
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    It's meant to introduce clean air in order to further convert unburned HC in the catcon, and provide a slight cooling effect.
     
  12. 88horizon5speed

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    so what im asking is will the cat ovrheat and catch fire without it? Ive already driven like 400-500 miles without out it hooked though so I suppose not?
     
  13. Bob Lincoln

    Bob Lincoln "CHECK FAULT CODES"
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    No, it won't. My last car had passive air injection to the cat (suction), and when it rotted away, there was no change in emissions or cat performance. I did have to replace the cat, because the pipe rotted and broke off right at the cat body, no way to seal it.
     
  14. 88horizon5speed

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    ok thank you Im not going to replace it. If my mpg dropped because of it I would but no sense.
     
  15. rmayerci

    rmayerci Active Member

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    My '84 was like that for a long time, but I found last summer that it wouldn't pass NJ emissions unless I replaced the long-siezed air pump and the pipe (which is not only available, but rather cheap, to my surprise).

    I think i got away with it for so long because the carb had been "bodged" by someone who didn't really understand it, but when I stumbled into a former dealer tech who actually had all all the old shop books (including the 2.2L drivability manual!!) in his attic, he got it running to where it needed the pump/pipe to smog clean.

    Since yours isn't carbureted, it sounds like it's less of an issue than my older version.
     
  16. 88horizon5speed

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    Its sealed up now with a bolt in the cat hole and the hose is bent shut. Ive driven 400 miles or more and back down to 36.4 mpg! I swear that pump exhaust leak was giving me 3 or so extra!
     
  17. Clay01

    Clay01 Member

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    My old 86 Charger with the 5 speed got a best of 40 MPG on a trip from Buffalo to Baltimore. My current 84 charger 5 speed gets 32-35 to and from work. It has the mallory distributor and an exhaust header. No manifold!
     
  18. Donnie 3.0

    Donnie 3.0 Well-Known Member

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    My 1981 Omni has the same gas in the tank since 1985, so it must get like a billion miles to the gallon.... well, that's not right... it hasn't moved since 1985 either... so, 0 miles to the gallon?
     
    RamDakDust likes this.
  19. 88horizon5speed

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    haha sounds about right. Is it in driving condition?
     
  20. Donnie 3.0

    Donnie 3.0 Well-Known Member

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    Unfortunately, no...
     

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