ECON vs SPORT.....surprise inside!

[silverbullet]

Originally Posted by Klasse Act

Mileage is steady at 40.3 mpg and the mileage since early December, according to the OBC is showing 40.4 mpg, pretty consistent but I will remind you guys that's the OBC average, not the calculator method but its pretty close though. My OBC showed my average at 41.2 and I got 40.3, so its fairly close and infact its spot on at time or within .1 mpg.

Hey SB, I've got the K&N typhoon coming, don't know when my buddy is going to install it but we'll see how that goes for mileage. IMO its going to improve mileage but we'll see for sure. Look at it like this, increase in torque and the engine doesn't have to work as hard, increease in mileage plus there's my driving style, I pay attention to coasting and don't speed, so I'm probably in the minority there. BTW, good choice on the color I must say.

35 mpg is the best I can do in the winter. Considering a 1.8 liter and mixed driving its OK.

I have been reading some of the papers that I've found and came across geometric compression. That would be the 10.4 compression Honda says. Then they were talking about how the compression changes due to variable cam timing and ignition timing. Basically regular gas would lower the compression to 9 to 1 and you will have a loss of power and mpg due to lower efficiency. Premium gas would raise the power by raising the dynamic compression to 10 and there is still room for improvement.

http://delphi.com/pdf/techpapers/2010-01-1203.pdf E85 just means no knock. Its a good read and the principles are the same in all engines. Remember me saying ethanol is added to raise the octane to produce a more efficient engine and mpg but ethanol has lower BTU's. That is why they want to raise the ethanol to 15 percent but they are having problems with reliability. It could roll out at any time.

[Klasse Act]

What do you mean when you say "it could roll out at any time", the 15% ethanol?

[silverbullet]

Originally Posted by Klasse Act

What do you mean when you say "it could roll out at any time", the 15% ethanol?

It will take a few years now. They voted it down this week, should have looked it up first. Ethanol Producer Magazine | EthanolProducer.com

I knew it was legal starting Jan.1 but with no funding they didn't do it. That is why gas went up when they Defunded it. I am all for raising octane but not with ethanol..

[Stu]

Originally Posted by Klasse Act

Hey STU, not doubting your finds but when I tried using the ECON mode for one week and then switching to SPORT I got about 3 mpg's better, but that's me, we'll see when I get to drive the car in the summer how it goes as I got the car in mid Sept of last year.

SB, what color CR-Z would you get?

When you tried the sport for a week, did you do a lot of highway driving too? In Michigan the speed limit is 75 mph, and I noticed that in Sport my tach revs at about 3,000, and when I hit normal or Econ it drops to about 2,200.
This week I'm trying premium gas for the first time, last week I tried Shell gas vs. Speedway and saw no real difference using regular gas.
My biggest problem with using sport mode is that I get a lead foot with it because I like the "takeoff"

[Klasse Act]

Originally Posted by Stu

When you tried the sport for a week, did you do a lot of highway driving too? In Michigan the speed limit is 75 mph, and I noticed that in Sport my tach revs at about 3,000, and when I hit normal or Econ it drops to about 2,200.
This week I'm trying premium gas for the first time, last week I tried Shell gas vs. Speedway and saw no real difference using regular gas.
My biggest problem with using sport mode is that I get a lead foot with it because I like the "takeoff"

My drive to work is really a true, mixed driving route. I'm on the highway for about 4 miles and then on another road that has lights but they're further spaced out, then I'm on a two lane going through a forest preserve w/o lights for quite a while, speed limit there and that other road is 55 mph, highway, same thing

As far as rpm's going from SPORT and ECON, well, that can't change just by pushing a button, the R's are based off of transmission and final drive and tire height. Now as far as how much you like the takeoff, well, I understand that completely but if you wanna get the mileage you've gotta drive it normal, I know its hard because the car is fun to drive but going back and fourth to work, I just go to and from and that's it.

My use of premium is based on what happened when I switched from 87 to 93 in my 2010 Fit and during the winter my mileage went up from 22-23 to 28-29 mpg and from my 1st tank in the CR-Z, I've run nothing but BP Ultimate (sometime other brands in a pinch but always premium) Like I said, my OBC is showing 40.3 mpg average since I reset trip B at the beginning of December 2011 and this is ofcoarse running winter grade fuel and dealing with cold weather and snow.

I've got the K&N typhoon coming soon and that should lean out my car a bit, so we'll see how that affects my MPG's. I had one of my Fit and it didn't change my mileage, infact, right before I got rid of the Fit, I netted 43 mpg on the freeway w/ the K&N typhoon and my wider wheels and wider tires too

[Klasse Act]

It seems to go up and down, got 38.6 mpg today but did some idling going from the Chicago autoshow to get some lunch/dinner and then in traffic back home until the traffic opened up, so I guess its ok. The gas light came on so since the tank was pretty low (it took 9.0 gallons), I decided to try some Shell V-power, just to see. Results by the end of the week or next weekend.

[F500]

FWIW, I agree with using 93 octane over 87. I also have switched back from using Shell to BP. my mpg's when up almost 10% with the BP over Shell.

but that's just me.

[Klasse Act]

Originally Posted by F500

FWIW, I agree with using 93 octane over 87. I also have switched back from using Shell to BP. my mpg's when up almost 10% with the BP over Shell.

but that's just me.

That's good to know about the Shell vs. BP, I did it "just to see" and it will be good to have some actual hard evidence myself but it seems to hold true, BP gets you better mileage I really hope the gas prices settle down, even if we get such good gas mileage doesn't mean I wanna pay $4.25+ per gallon by the end of April

[silverbullet]

KA, The paper that CRC was working on that Ive been waiting on is finally out. Its a hard read and it hurt them to write it but I agree with most of it. They dont talk about oil break down and Octane Requirement Increase. I am still reading it and its hard to understand because of the language and its more about engine efficiency than mpg. http://www.crcao.com/reports/recents...l%20Report.pdf

[Klasse Act]

Well, right now, after 2 trips to and from work, my OBC is showing 42.6 mpg, looks like its back up, even more than BP....dare I say! BTW, nice gas hike, F&CK!!!