winterescape
Posts: 155
Joined: Sun Jun 25, 2017 1:35 pm
Location: Upstate, NY

What MPGe are you getting?

Mon Nov 06, 2017 2:56 pm

Curious what other folks are getting. I have had the car for six months and 4K miles.
When I log into https://my.chevrolet.com it shows my "lifetime efficiency" @ 28 Kwh/100mi

To convert kW/100 miles to MPGe divide 3370 with your kWH/100 miles
Example: 3370/28 = 120.36 MPGe for me so far.

With the cold weather arriving, and my climate settings taking a larger portion of my energy consumed, I expect it will drop off soon...
I do like the heated seats and heated steering wheel! :D

NeilBlanchard
Posts: 314
Joined: Tue May 31, 2016 4:58 pm
Location: Massachusetts

Re: What MPGe are you getting?

Tue Nov 07, 2017 12:49 am

We are averaging 5 miles / kWh, that is ~200 Wh / mile, or 168MPGe. That includes almost half highway driving. We just passed 4,000 miles today; less than 2 months since we got it.

randW
Posts: 4
Joined: Sun Oct 08, 2017 1:19 pm

Re: What MPGe are you getting?

Thu Nov 23, 2017 1:28 pm

I started out getting the full 238+ with my Bolt but have had a noticeable loss of mileage lately. I seem to be getting 200 miles per charge and sometimes less. I fully charged (no Hilltop Reserve since I knew I would need a full charge) yesterday and, after a 197 mile trip limped home with (as best I could tell) a 1 mile charge left. The temp was 31 degrees but I did not use the heat. I had the heated seat on for most of the trip.

I traveled at approximately 70 mph for half of the trip and 55 mph on the way back (round trip). Does the outside temp truly make such a difference in mileage? A 20% reduction in milage seems off to me.

At what point do I take this to a dealer to have it checked?

Thanks for your responses.

DNAinaGoodWay
Posts: 247
Joined: Fri Sep 23, 2016 11:19 am
Location: Central Massachusetts

Re: What MPGe are you getting?

Thu Nov 23, 2017 2:19 pm

Your range sounds fine. The temperature factors in but even more so the speed. You’re using exponentially more power at 70 than 55. You must have steady nerves to drive it that low. Do you recall at what mileage you got the CVS and PPR warnings?
Leaf SL 2012-2014
Leaf SV 2014-2017
Bolt LT 2017-
6.72 kW Solar

DNAinaGoodWay
Posts: 247
Joined: Fri Sep 23, 2016 11:19 am
Location: Central Massachusetts

Re: What MPGe are you getting?

Thu Nov 23, 2017 2:25 pm

winterescape wrote:Curious what other folks are getting. I have had the car for six months and 4K miles.
When I log into https://my.chevrolet.com it shows my "lifetime efficiency" @ 28 Kwh/100mi

To convert kW/100 miles to MPGe divide 3370 with your kWH/100 miles
Example: 3370/28 = 120.36 MPGe for me so far.

With the cold weather arriving, and my climate settings taking a larger portion of my energy consumed, I expect it will drop off soon...
I do like the heated seats and heated steering wheel! :D


I drive a lot at 65-70 when it’s 35F and I average just over 3m/kWh. Not really interested in mpge since without any gallons on board I never think about that.
Leaf SL 2012-2014
Leaf SV 2014-2017
Bolt LT 2017-
6.72 kW Solar

WetEV
Moderator
Posts: 366
Joined: Sun Jan 03, 2016 1:26 pm
Location: Near Seattle

Re: What MPGe are you getting?

Thu Nov 23, 2017 3:37 pm

randW wrote:Does the outside temp truly make such a difference in mileage? A 20% reduction in milage seems off to me.


Subtract 1% from range for each 4F/2C below 70F/20C


From Tony's range chart for the Leaf. Note that this is battery temperature, not air temperature. Delta 40F implies 10% less energy.

Air density due to lower temperature, lower humidity. Used an air density calculator. About 7% denser air.

An 17% reduction due to just temperature. I would not bother the dealer.

Pile of notes: Leaf battery chemistry is different than Bolt's. I don't know the actual temperature air to battery relationships expected. Air drag isn't just a simple relationship with air density. And so on.
#49 on the LEAF 100 mile club.
Most everything around here is wet during the rainy season. And the rainy season is long.
2012 Leaf SL Red
2014 Leaf SL Red
Can't sit in a Bolt seat, hoping for better soon.
Or perhaps a Buick version? Buick Electra 225???

TimBolt
Posts: 55
Joined: Thu Jun 15, 2017 10:10 pm

Re: What MPGe are you getting?

Fri Nov 24, 2017 9:14 pm

randW wrote:I started out getting the full 238+ with my Bolt but have had a noticeable loss of mileage lately. I seem to be getting 200 miles per charge and sometimes less. I fully charged (no Hilltop Reserve since I knew I would need a full charge) yesterday and, after a 197 mile trip limped home with (as best I could tell) a 1 mile charge left. The temp was 31 degrees but I did not use the heat. I had the heated seat on for most of the trip.

I traveled at approximately 70 mph for half of the trip and 55 mph on the way back (round trip). Does the outside temp truly make such a difference in mileage? A 20% reduction in milage seems off to me.

At what point do I take this to a dealer to have it checked?

Thanks for your responses.


At 70 mph you will never get the rated 238 mile range, regardless of the outside temperature.
2017 Bolt LT

Semilinear
Posts: 13
Joined: Sat Nov 11, 2017 4:13 pm

Re: What MPGe are you getting?

Sat Nov 25, 2017 2:06 am

I have been driving it for 3 weeks now and the average efficiency is only 35 Kwh/100mi. When I go to office, it was 80% highway driving for 12 miles at about 72 mph. When driven on highway at that speed, the range would drop like crazy, which is totally expected.

I have also noticed that, combined with the highway speed (70 mph), turning on Climate Control at 70 degrees would have a combined impact of 200% on the actual range. For example, if my round trip is 30 miles on high way, it would show that I have lost 30 x 200% = 60 miles when I get back, driving at about 70 mph and also turning on the Heater at 70 degrees.

winterescape
Posts: 155
Joined: Sun Jun 25, 2017 1:35 pm
Location: Upstate, NY

Re: What MPGe are you getting?

Sun Dec 02, 2018 3:43 pm

Just reviewed my lifetime Avg. Using https://my.chevrolet.com/ it reports Lifetime = 32 Kwh/100 mi at about 15k miles since June 2017. Spirited driving style, cabin temp of 74 in the winter, and frequent use of the heated seats and heated steering wheel. 3370 / 32 = 105.3MPGe

The web site updates that now include bar charts and ability to export data is fantastic.

I would encourage others to share efficiency at fueleconomy.gov to help folks in the market for an EV understand real world efficiency results and make fuel cost comparisons. It is fast and easy to set up an account and given that GM tracks lifetime economy for us easy to post your results.

plj
Posts: 32
Joined: Sun Sep 03, 2017 9:52 pm
Location: Davis, California

Re: What MPGe are you getting?

Mon Dec 03, 2018 3:54 am

Thanks for posting. The MyChevy app reports total miles (16,686) and lifetime 3.7 miles/kWh. FuelEconomy.gov provides this conversion: 1 gallon of gasoline=33.7 kWh. Using that, I calculate 125 MPGe. I estimate my driving is 90% freeway, and I typically stay below 70 mph. Most of the use is in the Central Valley, Bay Area, and the Sierras.

I posted that on FuelEconomy.gov. I see reports from two other Bolt owners.

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