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Summer mix fuel changeover

I think that CT must have changed over to summer mix fuel on Apr. 15.

My mpg has been hovering just under 27 mpg since early March. This afternoon I tanked up and it came out at a hair under 30 mpg. Yes the afternoons have been warmer but a solid 10 % increase nearly overnight? I think the fuel changeover has occurred, at least in this state. Likely much of the Northeast is on the same schedule.

If you're watching for this in your mpg results - remember that you need to fill with the new stuff first, then you could notice results at the next fillup after that.

That could explain why I'm getting 5 mpg more on my test route with a covered (on the interior) rear bumper. I thought I would get .5 more. Perhaps I got better gas, too.

Same here. My tank average jumped from 68mpg to 75mpg and the typical daytime interstate cruising mileage jumped from around 72mpg to 80mpg. My new tires are nicely broken in with coasting performance equal or exceeding that of my old Michelin Harmony's, so I should see some good mpg figure this summer.

Quote:

Originally Posted by basjoos (Post 20536)

what kind are they?

10% Ethanol stickers were recently put on my gas pumps... I've noticed a bit of a hit in FE... But I don't get winter gas as far as I know :D

Most of the studies I've seen have E10 at a 1-3% loss. Some places have E10 all year around.Here's one but it's from the ethonal folks. I've seen an increase in FE with Eoth in 2 cars, both small displacement. I think in general that the affect of E10 are over estimated and the affects of temperature is under estimated. YMMV (Your mileage may very)

Quote:

Originally Posted by Lazarus (Post 20549)

That sounds about right - the aforementioned hit has been ~1.5mpg... Slightly higher than 3%, but it puts me under 35mpg which makes me sad :(

Quote:

Originally Posted by trebuchet03 (Post 20553)

That sounds about right - the aforementioned hit has been ~1.5mpg... Slightly higher than 3%, but it puts me under 35mpg which makes me sad :(

Maybe it will bounce back up once the ECU adjust:D

Quote:

Originally Posted by trebuchet03 (Post 20553)

That sounds about right - the aforementioned hit has been ~1.5mpg... Slightly higher than 3%, but it puts me under 35mpg which makes me sad :(

Just be glad you don't use E85. Consumer reports found a 27% reduction in FE in one case.

http://www.consumerreports.org/cro/c...anol_ov1_1.htm

:(

Quote:

Originally Posted by lovemysan (Post 20540)

what kind are they?

Sumitomo HTR T4 165/70/13

Found some good info on the subject here:

http://www.epa.gov/oms/rfgecon.htm#1

The table at the very end is very interesting.

Quote:

Originally Posted by Arminius (Post 20557)

Just be glad you don't use E85. Consumer reports found a 27% reduction in FE in one case.

http://www.consumerreports.org/cro/c...anol_ov1_1.htm

:(

Meh, E85 was never advertised to increase mpg :p Just renewable and somewhat better for emissions

Quote:

E85 also provides important reductions in greenhouse gas (GHG) emissions. When made from corn, E85 reduces lifecycle GHG emissions (which include the energy required to grow and process corn into ethanol) by 15-20% as compared to gasoline. E85 made from cellulose can reduce emissions by around 70 percent as compared to gasoline....

However, E85 also increases emissions of acetaldehyde--a toxic pollutant. EPA is conducting additional analysis to expand our understanding of the emissions impacts of E85.

But, the 27% is pretty much in line with what the EPA has said

Quote:

In general, E85 reduces fuel economy and range by about 20-30 percent, meaning an FFV will travel fewer miles on a tank of E85 than on a tank of gasoline. This is because ethanol contains less energy than gasoline. Vehicles can be designed to be optimized for E85--which would reduce or eliminate this tendency. However, no such vehicles are currently on the market. The pump price for E85 is often lower than regular gasoline; however, prices vary depending on supply and market conditions.

But, the cost versus btu's isn't favorable...

Cost of E85 (national average): $2.860
E85 MPG/BTU adjusted price: $3.763

Current National Average of gasoline (reg): $3.474

EPAE85 and Flexfuel
AAA National Average

Personally, I'm not a fan of E85/ethanol as a solution in it's current form... As an intermediate, perhaps - but the global impact isn't so very good (again, in it's current form)