GMT 800 & Older GM General Discussion 2006 & Older Trucks | General Discussion

Bad Gas Milage from Dying Trans?

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Old Feb 2, 2013 | 10:11 PM
  #11  
dmelvin's Avatar
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From: Rock Port, MO
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Could also be where you're getting your gas... There were doing some tests around here and found a couple of stations that we up to E-30...

You're getting about what I am right now in my ECSB FWIW. Mine is with a blackbear tune.

My Uncle said that he lost nearly 10 MPG in his 03 Vette from running Casey's Gas.
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Old Feb 3, 2013 | 12:03 PM
  #12  
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I've been getting gas mostly from Dillons or Quick Shop, although I did run to Oklahoma the other week and filled up with ethanol free down there, boosted me about 1mpg lol.
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Old Feb 4, 2013 | 02:33 AM
  #13  
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Just so nobody feels bad, if I'm not on the highway I get 10MPG....tops. Highway is lucky to see 16MPG.

Fuel filters need to be changed roughly every 6 months or so where ethanol is present. E-15 to E85 will remove the older layers of your tank and deposit them in the filter. You'll know when you pour the old filter out and it looks like overdone coffee.
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