nsteblay Posted May 16, 2015 Report Share Posted May 16, 2015 I've been keeping track of every trip since Jan 1 using the Automatic ODBII. Here is a graph of my MPG / Mean Temp F Definite correlation between temperature and MPG djc and hybridbear 2 Quote Link to comment Share on other sites More sharing options...
nsteblay Posted May 16, 2015 Author Report Share Posted May 16, 2015 Here is the same data set with MPG to Avg MPH. Some correlation but much less. Quote Link to comment Share on other sites More sharing options...
ptjones Posted May 16, 2015 Report Share Posted May 16, 2015 (edited) Interesting Data there. So it looks like you lose 2.2mpg for each 10*F drop in temp. In the Testing I did over 2yrs ago I got 2mpg for each 10*F drop. Under ideal conditions, Level, no wind and 80*F I see 72mpg at 40mph and 47mpg at 70mph with Grill Covers, Wheel Covers, ScanGaugeII, 50PSI Tires Pressure, GasPods and Premium Gas. This curve isn't a straight line. :) Edited May 16, 2015 by ptjones djc and hybridbear 2 Quote Link to comment Share on other sites More sharing options...
hybridbear Posted May 16, 2015 Report Share Posted May 16, 2015 This confirms what a 2010 FFH driver estimated when the 2013 hybrids were announced. ptjones 1 Quote Link to comment Share on other sites More sharing options...
nsteblay Posted May 18, 2015 Author Report Share Posted May 18, 2015 Yes. Here is the same diagram with a regression line and formula. Little over 2 for every 10 degrees. djc 1 Quote Link to comment Share on other sites More sharing options...
nsteblay Posted May 18, 2015 Author Report Share Posted May 18, 2015 Yes. Eliminating variables for MPH test is the only way. My data shows a correlation but is impacted, probably by mostly temperature. Quote Link to comment Share on other sites More sharing options...
fbov Posted May 18, 2015 Report Share Posted May 18, 2015 Yes. Eliminating variables for MPH test is the only way. My data shows a correlation but is impacted, probably by mostly temperature.And route. Effectively, I measure at 30 MPH and 50MPH average speeds,based on route length/transit time. The slope is higher at lower speed, more like 3MPG for every 10F, and closer to your 2.4MPG for 10F at the higher speed. HAve fun,Frank Quote Link to comment Share on other sites More sharing options...
BobJustBob Posted June 7, 2015 Report Share Posted June 7, 2015 Here's my version of the mpg vs ambient air temperature graph. I compiled the statistics for roughly a year, from around August 2013 through July 2014. I took the measurements during my morning commute of around 8.6 miles to work. (I chose to do it then because I almost always go straight to work; during my evening commute I often run side-errands, etc.). hybridbear, JAZ and ptjones 3 Quote Link to comment Share on other sites More sharing options...
SnowStorm Posted June 8, 2015 Report Share Posted June 8, 2015 Very nice! Does your car sit outside overnight or is it garaged? Quote Link to comment Share on other sites More sharing options...
fbov Posted June 8, 2015 Report Share Posted June 8, 2015 Interesting... I see a just hint of the shift your data shows right around freezing! If you extend your warm weather trend to lower temperatures, all the cold weather data falls below the trend line. I wonder if that's fuel reformulation, or something in the car's warm-up/run temp requirements? I see the same thing, but I also put on snow tires... this for a 15 mile, 30 mph commute, both AM and PM. Have fun,Frank hybridbear 1 Quote Link to comment Share on other sites More sharing options...
djc Posted June 12, 2015 Report Share Posted June 12, 2015 Great graphs.Any idea if block heater helps mpg on circa 10 mile trips in cold weather? Quote Link to comment Share on other sites More sharing options...
fbov Posted June 12, 2015 Report Share Posted June 12, 2015 BINGO!! Paul Jones has done a lot on aftermarket block heaters, as well as the OEM, which is $$$ to install. We should all have them, but my Ohio-sold car does not. Its taken me 2 years to figure out how to get around the engine's need for heat (much less mine), and I'm ready to install one. The problem is that aftermarket heaters either external, or radiator hose inserts. The former are less effective than you'd like, the latter are very effective, but there are warranty concerns cutting into coolant hoses. No good options. Have fun,Frank Quote Link to comment Share on other sites More sharing options...
ptjones Posted June 12, 2015 Report Share Posted June 12, 2015 (edited) FORD block heater is the best solution operationally, but a pain to install. BTW my plug for the FORD Block Heater at the block isn't making a good connection now after having the new Trans installed, not looking forward to working on that. The simple solution is the Oil Pan Heater, but there isn't much room to install one. My pic is of a NAPA oil pan heater which was to big. I will try to take pics when I work on block heater.I'm using the wolverine Model 9 at 125 Watts/120vac, but it only raises temp by 20*F. The combination of Oil Pan Heater and Block Heater I get a 60*F rise in WT. There is a fairly smooth spot on the back of block that another Model 9 pan heater could be placed to act like a block heater. :) Paul Edited June 12, 2015 by ptjones Quote Link to comment Share on other sites More sharing options...
markd Posted June 12, 2015 Report Share Posted June 12, 2015 I hate to be a smart ass but a garage works great. Quote Link to comment Share on other sites More sharing options...
ptjones Posted June 12, 2015 Report Share Posted June 12, 2015 I hate to be a smart ass but a garage works great.Actually Garage+ ICE Block Heater+ Oil Pan Heater much better, been able to start at 130*F so you don't have to wait to get to 128*F before you can get in EV Mode. Now if I could only get to 202*F before I started for max efficiency! LOL :) Paul markd 1 Quote Link to comment Share on other sites More sharing options...
hybridbear Posted June 14, 2015 Report Share Posted June 14, 2015 The winter decline at a different slope is probably a combination of:winter gas blendincreased rolling resistance due to snow/ice on roadThe increased air density should be factored into the slope of the warmer temp calculations as should the changes in ICE warm up time at different temperatures. Quote Link to comment Share on other sites More sharing options...
ptjones Posted June 15, 2015 Report Share Posted June 15, 2015 With temps in the 85-93*F now I'm averaging 55.8mpg on this tank. :) Paul C-MaxSea 1 Quote Link to comment Share on other sites More sharing options...
djc Posted July 11, 2015 Report Share Posted July 11, 2015 The "Automatic" brand obd-ii adapter with onboard ram and its own gps that nsteblay used to generate data is/was carried at Target stores. Although the second generation adapter was just introduced, it is already clearance at some (not most) Targets. It may be the smaller Target stores that clearance them now. Regular $100, clearance $30. They are stocked in electronics department, in with the Wemo wifi switches and other home automation. http://www.target.com/p/automatic-car-adapter-car-apps-2nd-generation/-/A-18828576 The "automatic" has its own iphone / android apps. It reads and resets trouble codes like most obd-ii adapters and software. But it also uploads location data to the phone when the app is run in the car, and then uploads the data to dashboard.automatic.com where the graphs are produced. The data can be downloaded to Excel or other spreadsheet. Their "dashboard" website also shows each trip on a map with time, distance and mpg info for each segment (key on / key off), as well as whether there was hard acceleration or braking or speed over a set amount (e.g. 70mph). I just got a clearance adapter and am enjoying the mpg and trip information - as well as realizing how much time I spend in the car. I wish I had one of these when my sons were new drivers. They have a demo at their website. I was unable to connect the Automatic adapter to Torque Lite, but will try again, along with Forscan. If anyone can confirm it works with other obdii software please post. Quote Link to comment Share on other sites More sharing options...
cheezy Posted July 11, 2015 Report Share Posted July 11, 2015 (edited) I've been keeping track of every trip since Jan 1 using the Automatic ODBII. Here is a graph of my MPG / Mean Temp F Definite correlation between temperature and MPG May I dare paraphrase your results? Once the ambient goes below 50 degrees Far. it would be sensible to start running a grill cover? Are you running ethanol free fuel? http://pure-gas.org/index.jsp?stateprov=FL Edited July 12, 2015 by cheezy Quote Link to comment Share on other sites More sharing options...
Tomasz Karwowski Posted August 7, 2015 Report Share Posted August 7, 2015 (edited) In Poland we have 95F(in the shadow) now. Why my MPG is lower than when is for ex. 70F. ?? AC is off (to test). The EV turn on very quickly but the battery does not charge more than 1/3. First 20 miles - 34mpg. Edited August 7, 2015 by Tomasz Karwowski Quote Link to comment Share on other sites More sharing options...
fbov Posted August 7, 2015 Report Share Posted August 7, 2015 You have a C-Max Hybrid in Poland? Thought the hybrid was a US-only model... or do you have a US-spec car? I suspect if the ambient temps are very high, the battery may avoid high charge levels, as the combination of high ambient temperature and full charge shortens Li=ion battery life. There are cooling fans for the battery; are they running? Perhaps a driving style that features a lot of short burns and glides, so you only use the available charge? Won't work on long hills.... Have fun,Frank Quote Link to comment Share on other sites More sharing options...
Tomasz Karwowski Posted August 7, 2015 Report Share Posted August 7, 2015 (edited) Normal driving from home to work - 2miles. At 70F it was 40mpg. How can I erase EV+ settings? It turns on 3 times on this 2 miles (EV+ settings from 4500miles - can it by a problem ?? ). I od not hear any fans. But on self test ODB they works fine. There is no obd trauble codes. My C-max is from US like my other cars since 2005 :). Cars from US are better :D. Edited August 7, 2015 by Tomasz Karwowski Quote Link to comment Share on other sites More sharing options...
ptjones Posted August 7, 2015 Report Share Posted August 7, 2015 It is difficult to get good MPG's driving just 2miles, I'd be using Grill Covers and ICE Block heater to improve MPG's. ;) Paul Quote Link to comment Share on other sites More sharing options...
Tomasz Karwowski Posted August 7, 2015 Report Share Posted August 7, 2015 Last trip - 1100km (683miles) - 44mpg with fully loaded car on the polish roads :) I do not have active grill shutter - was broken and i can't buy it in poland :(. Quote Link to comment Share on other sites More sharing options...
ptjones Posted August 7, 2015 Report Share Posted August 7, 2015 This is what Grill Covers look like. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.