Actual EPA MPG Test Results

[IsaacMTSU]

Not sure if this has been posted before, but I found a .pdf of the test results from Honda's EPA test runs. There is some pretty cool data here...

It's really confusing and hard to scroll around to find everything, but basically:

-They used a 2011 CR-Z 6MT and a 2011 CR-Z EX CVT for the tests
-Caculated the "test weight" for dyno tests at 3,000 LBS
-Target Coefficients (maybe for the dyno to simulate rolling resistance) are listed
-The A/F ratios were tuned for LBT (Lean Best Torque) +6% to avoid catalyst damage
-The test cars had ~4700 miles on them
-They did a 20F temp, 50F temp, City, and Highway test cycle (no SC03 "A/C on" test)

The CVT did 44.4443 MPG City Average and 51.4047 MPG Highway Average.

As far as I can decifer, the 6MT was used for the exhaust emissions tests, but the data may be in there for the MPG tests too since they have to be tested separately.

It really makes me want to get a Flash Pro to lean out the A/F ratios a little now that a read these results taken at LBT+6%. These results are also available for the 2012 model year too, but I didn't read it. Pretty impressive results, but they are corrected by a certain formula before they are posted on the window sticker to better "estimate" the real world results that you get when you don't try to drive efficiently. It does show what the car can accomplish with limited battery charge (I'm sure) and really hard test runs. Some of the tests drive up to 80 MPH and accelerate at a rate similar to a 7-second 0-60 run.

[edit] Here's the link! http://www.epa.gov/otaq/datafiles/FO...1.51D3_INI.pdf

[Klasse Act]

Good info, your sig got my attention! I will posting info about our annual Dragon run soon, would love to invite the CR-Z forum out there to join us this year!

[gomarlins3]

51 hwy? Wow, they must have been doing exactly 55 mph on a completely level surface with no wind.

[GoHuskies]

Originally Posted by gomarlins3

51 hwy? Wow, they must have been doing exactly 55 mph on a completely level surface with no wind.

Wouldn't that be more like 55 MPH on an indoor climate controlled test pad?

[IsaacMTSU]

Yeah it seems kinda high, but they actually factor in the coefficient of drag (wind) and rolling road resistance for each speed on the dyno as well as having gas specifically made to be the same for each test.

[TCroly]

Originally Posted by gomarlins3

51 hwy? Wow, they must have been doing exactly 55 mph on a completely level surface with no wind.

Originally Posted by GoHuskies

Wouldn't that be more like 55 MPH on an indoor climate controlled test pad?

Here is a link to the routine of the testing: Detailed Test Information

The dyno is programed with a drag coefficient for wind and grade.

As stated, the raw numbers are "adjusted" with some kind of fudge factor before the final numbers are calculated.

The results in the PDF are awfully difficult to interpret. Any explanation that someone could offer would be appreciated.

[GoHuskies]

I gave up trying to read those chart results.

[Klasse Act]

Yeah I don't know about all that, the best I got on the freeway was last fall going from the northern part of Kentucky (really no hills), going through Indiana and on into Illnois (very flat) and got 44.6 mpg, although the car was probably not quite broken in yet but my mileage went up and up on each leg of the trip going down and then coming back up. I did use ECON while on the freeway and the cruize, ofcoarse. I will say this though, next time I get into the hilly bits, the NORMAL mode is going to be used because you lose so much momentum and it takes a while for the ECON mode to get you back up to your set speed and thus, used more fuel to get going up those mountains.

[IsaacMTSU]

Most of the data there is about exhaust gas emission levels anyway. As for ECON mode lagging on hills, that's actually a really nice feature called "Drive by Load" cruise control. It's better for MPG to slow down while going uphill and regain the speed on the downhill which is easier to accelerate. That's the opposite of what happens when you try to stick it on a certain speed all the way up and let off on the way down.

[Klasse Act]

^^^ I plan on using ECON for most of my highway trips but will experiment with NORMAL and SPORT as well ^^^