Mpg ?
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Junior User
Joined: Aug 2005
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Mpg ?
Just got back from a camping trip and checked my MPG. I tow a 8500 lb fifth wheel. I never got less than 10 mpg. This time I got 8mpg. Same trip we took a couple of times with 10+ mpg. My ? is This tank was Sunoco about 1/4 tank and a place called fastrack. Fastrack uses 10% ethonol and I know Sunoco uses ethonol. I didn't have time to go to kwikfill the gas I use most of the time. Will my mpg change with the gas with ethonol blend?
New User
Joined: Mar 2008
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I found that the 10% ethanol will kill my gas fuel economy. I travel to a deer camp about 200 miles away about once a month.... usually I get about 14mpg on the way up and home on a 10% mix. I have found a station up there that does not use the ethanol mix so for the last 3 trips I have filled with non-mixed gas and have seen 19-20mpg on a ride that i used to get 14mpg
Sick 'n Tired
Joined: May 2006
Posts: 2,969
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From: League City, TX
Yes, reformulated or oxygenated gas utilizing ETOH will lower your gas mileage. My rig gets close to 14mpg mixed driving on 100% unleaded and 12ish with 10%ETOH. E85 is worse...I get around 9.5mpg.
MMNC (SS)(Ret)
Joined: Mar 2004
Posts: 11,606
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From: SE Georgia
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Posting Guru
Joined: Oct 2005
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Forget the ethanol mixture----------your gas mileage will go down! Use Shell, Exxon, or one of the other local brands that do not blend in ethanol. My Explorer went down over 2 mpg with the ethanol mixture; almost the same results with the F-150.
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Sick 'n Tired
Joined: May 2006
Posts: 2,969
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From: League City, TX
He might not have a choice. If you're in or traveling thru a large city or an adjacent county to a large city chances are that reformulated/oxygenated gas is required by law. Might as well get used to it...if I recall correctly the EPA has mandated that all gas be reformulated to meet certain standards within the next couple of years. That means adding ETOH b/c they can't use MTBE anymore.
Down here in Houston it's been the norm for years now...
Down here in Houston it's been the norm for years now...
Junior User
Joined: Aug 2005
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I had the same problem on my trip to Gulf Shores once I hit Tennessee I could only find gas with 10% moon shine in it. My mileage didn't go back up until I got some real fuel. The corn liquor runs better in me then my truck.
vanman250
vanman250
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From: "Garden State"
Whimsey
Laughing Gas
Joined: Oct 2005
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From: South Jersey
Mabey that explains why I get about 1 mpg more running a programmer on 91 octane tune. Normally I get about 12-13 w/ mixed driving, but 13-14 running premium and the programmer. I'm not suggesting everyone do this, but I have been observing this due to the fact that I hand calculate my mpg at every fill up. For most vehicles, ethanol robs mpg's. Today's engines run so much cleaner than ever before, I wonder if ethenol is even needed.
Sick 'n Tired
Joined: May 2006
Posts: 2,969
Likes: 47
From: League City, TX
I've used all three grades through all 3 modes on my edge...I always seem to get the same crappy mileage no matter what. I've dusted off my Excel spreadsheet and have started another "study" into mpg and mods. Stay tuned.