It's official: Comfort mode = worst mileage
07-14-2012, 08:45 AM
#22
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What's the octane rating on the gas you use, and how much corn squeezins (ethanol) is in it? Just curious.
Also, I never hear anybody note that they're running the AC during these discussions. I feel pretty sure that throws off efficiency significantly. You noted it was 105F, so I figure I could guess that answer.
Also, I never hear anybody note that they're running the AC during these discussions. I feel pretty sure that throws off efficiency significantly. You noted it was 105F, so I figure I could guess that answer.
Here's a map of summer blends in different areas of the US: http://blog.gasbuddy.com/blogpostv2....stid=523&ign=2
I generally buy Chevron, which used MTBE for the winter gas, but I think that got banned and is now ethanol in the winter.
To the other part of your comment, yep the higher AC load is what I was referring to. Not sure of the impact, summer vs winter, but it's probably in the 1-2 mpg range. Going a full tank without AC in the summer, to check the mpg difference, is not an experiment I am willing to do
.
07-16-2012, 01:39 PM
#23
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I tend to get the best gas mileage when it's warm out (85°-90°F) but not scorching hot. Car doesn't spend very long getting to operating temps which is a huge waste of gas. I'm not sure if this statement is truly valid but I believe (from experience) the car gets way worse gas mileage getting to operating temp than it does using the A/C, that's why you typically will get better gas mileage in the warmer months, compared to colder months.
07-16-2012, 01:41 PM
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I tend to get the best gas mileage when it's warm out (85°-90°F) but not scorching hot. Car doesn't spend very long getting to operating temps which is a huge waste of gas. I'm not sure if this statement is truly valid but I believe (from experience) the car gets way worse gas mileage getting to operating temp than it does using the A/C, that's why you typically will get better gas mileage in the warmer months, compared to colder months.
07-16-2012, 06:39 PM
#25
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I think ethanol is only in winter gas around these parts, which goes from November through March if I recall. But there's never-ending legislation proposed by ethanol lobbyists and oil industry lobbyists and MTBE lobbyists and environmental lobbyists, so I don't pay that much attention. Nothing practical that can be done about it.
07-19-2012, 05:04 PM
#26
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Since I get crummy mileage due to all city driving, I thought I'd see what driving a whole tank in comfort mode would do for mileage (currently at about 2000 miles on the odometer, so for those that say mileage improves after the break-in period...Nope. Not for me anyway)
Comfort mode resulted in my worst mileage yet! 13.7 mpg
My overall average is 15.1 mpg, best ever was 16.0, and worst prior to this was 14.6.
PS I think I deserve a medal for the restraint exercised in driving a whole tank in comfort mode But I'm glad to have some data to show there's no good reason to ever put it in comfort mode.
Comfort mode resulted in my worst mileage yet! 13.7 mpg
My overall average is 15.1 mpg, best ever was 16.0, and worst prior to this was 14.6.
PS I think I deserve a medal for the restraint exercised in driving a whole tank in comfort mode
But I'm glad to have some data to show there's no good reason to ever put it in comfort mode.
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