Winter gasoline?
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Post Fiend
Joined: Jan 2004
Posts: 6,610
Likes: 2
From: Northwest, Arkansas
Winter gasoline?
May not be the right forum but here goes. I notice that I have dropped 2-3 mpg lately from what I normally get. I was talking to some friends and they said it was because it was winter and I was using winter gasoline. Something about the way it was oxygenated different and that this fuel was less efficient and therefore I have reduced fuel mileage. Can anyone back that up or clear thing up a little? I had never heard of that around here. I know some areas have different gas for winter but not all over. 
Senior User
Joined: Dec 2004
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The factors mentioned by furball and others are probably the most significant. especially the part about running rich when cold.
It is a fact that the gasoline formulations change on a seasonal basis and in different regions of the country. This is for drivability, evaporative emissions, tailpipe emissions, forbidden/controlled additives in certain areas, and other reasons.
Your area may not require the emissions reducing stuff during winter, (check here to see if you do http://www.epa.gov/otaq/boutique.htm ) but you still do get "winter gas" and it may affect your mileage.
http://www.nacsonline.com/NR/exeres/0000318ffeshvdpsahcctpeg/GeneralUse_OneCallout.asp?NRMODE=Published&NRORIGI NALURL=%2fNACS%2fResource%2fPRToolkit%2fCampaigns% 2fprtk_gp2004_CleanAirImpact%2ehtm&NRNODEGUID=%7bF 4938734-47A8-4007-9153-B3089135B5C1%7d&NRQUERYTERMINATOR=1&cookie%5Ftest= 1
etc.
It is a fact that the gasoline formulations change on a seasonal basis and in different regions of the country. This is for drivability, evaporative emissions, tailpipe emissions, forbidden/controlled additives in certain areas, and other reasons.
Your area may not require the emissions reducing stuff during winter, (check here to see if you do http://www.epa.gov/otaq/boutique.htm ) but you still do get "winter gas" and it may affect your mileage.
http://www.nacsonline.com/NR/exeres/0000318ffeshvdpsahcctpeg/GeneralUse_OneCallout.asp?NRMODE=Published&NRORIGI NALURL=%2fNACS%2fResource%2fPRToolkit%2fCampaigns% 2fprtk_gp2004_CleanAirImpact%2ehtm&NRNODEGUID=%7bF 4938734-47A8-4007-9153-B3089135B5C1%7d&NRQUERYTERMINATOR=1&cookie%5Ftest= 1
etc.
Last edited by taylor0987; Jan 18, 2005 at 09:38 AM.
Lead Driver
Joined: Nov 2000
Posts: 6,623
Likes: 342
From: Albuquerque
If they add alcohol in the winter as an oxygenate for clean air it will definitley cost you gas milage. I lose 3 to 4 on a camaro. My truck doesn't idle as well and I go out of my way to get gas in the next county.
Thread Starter
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Post Fiend
Joined: Jan 2004
Posts: 6,610
Likes: 2
From: Northwest, Arkansas
Ok everyone it looks like there was some validity to this statement so now I may know why it has seemed that my fuel mileage dropped this winter. Thanks for all the input and help in clearing up the question.
