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Oxy fuel - summer vs winter
Posted by Bill D (more from Bill D) on Fri, 20 Oct 2000 22:31:05
In Reply to: Re: Anyone know anything about the oxygenated fuel used in the NE?, Richard Miller, Fri, 20 Oct 2000 18:19:12

I've forgotten the exact changes in specifications for summer vs winter fuel. In winter, oxygenate may be omitted as smog & depletion of ozone is less critical. Also, fuel vapor pressure is increased by adding increased proportion of butanes and similar - which helps volatalize the fuel (that was a problem with carburettors but less so with fuel injection). How did the loss of performance show - harder cold start, hesitant running, poorer acceleration? First two indicate gas is still at summer spec's or similar, the third might indicate poorer octane/energy content in fuel due change in components. And - though it should not be - it may be that you got the wrong (worse) octane grade at the pump. Try another brand or different station.

Posts in this Thread:

Anyone know anything about the oxygenated fuel used in the NE?, Norm 9-5 Aero, Fri, 20 Oct 2000 13:07:24
- Vote for algore and get more dumbed-down gasoline. n/m, Rafe , Thu, 26 Oct 2000 11:40:17
  - Or the combustion engine as we know it! n/m, Norm 9-5 Aero, Fri, 27 Oct 2000 02:01:57
- Re: Anyone know anything about the oxygenated fuel used in the NE?, Bill D, Fri, 20 Oct 2000 13:54:20
  - Re: Anyone know anything about the oxygenated fuel used in the NE?, Richard Miller, Fri, 20 Oct 2000 18:19:12
    - Oxygenated fuels do not enhance performance., JC, Tue, 24 Oct 2000 16:54:05
      - Tax credits for new car purchasers! Leave the gas alone. n/m, Norm 9-5 Aero, Fri, 27 Oct 2000 02:06:43
      - Re: Oxygenated fuels do not enhance performance., Richard Miller, Wed, 25 Oct 2000 18:26:07
        Re: Oxygenated fuels do not enhance performance., JC, Thu, 26 Oct 2000 08:30:09
    - Oxy fuel - summer vs winter, Bill D, Fri, 20 Oct 2000 22:31:05
    - 10-15% loss in MPG with oxygenated NE fuels, RJ, Fri, 20 Oct 2000 21:29:19
- Re: Anyone know anything about the oxygenated fuel used in the NE?, Rick D., Fri, 20 Oct 2000 13:45:04

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