Difference in blend: higher fuel efficiency or higher power fuel? - Page 2 - Fuelly Forums
Go Back   Fuelly Forums > Fuel Talk > General Fuel Topics
Search Today's Posts Mark Forums Read
Thread Tools Display Modes
Old 12-16-2010, 10:22 PM   #11
Registered Member
Join Date: Sep 2008
Posts: 122
Country: United States
Location: Orange County, California
DTMAce and BDC,

I like BDC can literally pinpoint the first tank of the switch from summer to winter blend and back again as I too see a way off the scale increase and decrease in my mileage. It was bad before the outlawing of MTBE, but it is worse now with the E10-E15 blends we get in So. Cal.

I agree that there is a difference in extreme temperture changes, but in So. Cal. much of the time the difference between summer and winter is maybe 30 degrees, fall and spring are usually negligable. There is definately something there but it is often statistically irrelevant compared to the fuel blend differences.


I too lived in the bay area for a while while my wife and family were in So. Cal. back in the early 90's and my monthly drives up and down I5 were the times when I got my best mileage, 400 miles at a nearly constant speed made for excellent mileage. The most notable exceptions were during times of Tule Fog and holiday weekends when traffic would interrupt my cruise speeds.

bates is offline   Reply With Quote
Old 12-23-2010, 02:40 AM   #12
Junior Member
Join Date: Nov 2010
Posts: 18
Country: Canada
Sure there is a power difference. My mustang gets more mpg and seat of the pants power with shell v-power. Knock sensors will retard timing if poor fuel is used thereby costing you power. And my mustang performs amazing off chevron 94 with no ethanol as compared to shell regular with 10% ethanol. Ethanol is pollution in our fuel causing consumption to go up due to poorer mileage as compared to actual pure gas. If they built cars to run off straight ethanol and the engines were tuned for it that would be a different story but as of right now that stuff sucks

Everett is offline   Reply With Quote
Old 12-25-2010, 01:35 PM   #13
Junior Member
Join Date: Nov 2010
Posts: 18
Country: Canada
and there is more oxygen in colder air so you should be getting more mpg when its cooler out....not winter however because winter gas is different than summer and will get less mpg

Everett is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Powered by vBadvanced CMPS v3.2.3

All times are GMT -8. The time now is 11:53 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.