What "sucks" about ECO mode, I mean does the mileage go up? I can live with some concession as long as the mileage reflects it. On my way to work in the early morning I'm just trying to get to work, so I don't need any performance at all (I can't believe I just said that but its true). I really like what I'm hearing about the CR-Z, too bad the dealership I'm dealing with only has a red stick though

Speaking of mileage, I got 37.2 today using Mobil 93, I had to use it because i wasn't near the BP station I usually go to but did fill up with BP today, hope this gas spike goes away soon, I mean we were on our way down. I'm heading back home after work Friday and might get gas in Indiana as I heard its alot cheaper there. I know there's going to be alot of traffic/construction at the border of Illinois/Indiana, so that's going to screw my accuracy on the freeway mileage for sure, that's why I wanna fill up in Indiana and then top off in Detroit for the mileage going there. Now, on the way back, since I'm coming home Sunday and not Monday, I expect the traffic to be normal and that's where we'll see if I can hit the 41 mpg record with my current tire/wheel combo or the 43 mpg w/ the stockers, we shall see

 

Today I was shopping for a fuel injector cleaner and I saw Iso Heet in the red bottle. It says also good for cleaning injectors so I bought a bottle and put it in. After emptying into my tank the bottle smelled 100% like IPA. Is that all this stuff is Isopropyl Alcohol? Makes some sense as IPA will displace/evaporate moisture but how can it clean injectors? Is the cleaning ability for this stuff overated? My usual cleaner is STP Super Concentrated, Berrymans B-12 or in extreme conditions SeaFoam (pricey).

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Premium usually is ethanol free and has more aromatics. Iso heet is IPA with 1 percent fuel injection cleaner. It removes the water aromatics can hold which will dry it out and the fuel works better. It holds it in suspension and carries it through the injectors. Its kinda like water injection when the water is released and the steam cleans the engine. http://www.goldeagle.com/brands/heet/default.aspx


I use half a bottle every 5th or so fill up. Its the same stuff in sea foam.
Homebrew Sea Foam (SeaFoam) Motor Treatment Recipe

 

That homebrew is crazy, I don't have a degree of any kind but feel I would get one afterwards

 

Going back home after work Friday netted me 43 mpg, gassing up somewhere in Indiana and filling up in Novi Michigan, I was blown away, never got over 40 going there, just coming back. As far as the on the way back, well, the OBC showed almost 38 mpg but I didn't fill it up when I got home because more than likely, the Fit is going away in place of a CR-Z

Nothing wrong with the Fit, not at all but ever since I had to settle for an automatic its always bothered me. I test drove a CR-Z 6 speed and it was awesome and pretty quick compared to the Fit and I'm sure its going to be getting over the 31/37 mpg rating it shows, after all, my car is rated at like 29/33 or something like that. I saw an auto Fit in the showroom and the hwy mileage was rated at 33, are they kidding

I hope to get the car either tomorrow or Wednesday, we'll see.

 

Just FYI if you pick up a 2011 CR-Z, get the dealer to address the recall, might be something to talk down the price a tad even...

http://www.ahm-ownerlink.com/Documen...se_0000026.pdf

 

Coming back from Lake Superior I decided to perform a bit of a one of experiment.. and netted 44.84mpg over ~250 miles. Averaging 71.x mph (over 3.5 hours) and not driving particularly carefully. Passenger and 200lbs of gear in the car as well.

I have my Denso IK22 plugs in the car, Panson's Race ETC was set to "SP7."





This was done on a tank of BP 91oct E0 with a bottle of Iso HEET and 4 gallons of 116oct (C16 Leaded "Blue" Gas) for a final R+M/2 Octane value of about 99.5-100.

This was filled at the start of the drive at the cabin, stopping at a Mobil station when I finally reached the half way mark and I wanted to see how much I had used, which turned out to be 5.547 gallons of "test" fuel. I don't recommend putting leaded fuel in your Fit, at least not often because it eats oxygen sensors.

With whatever remained from the "test" tank plus Mobil 93 this is where the needle sat when I got home, check the odometer there were no shenanigans. Probably closer to 95octane at this point.


The conditions today were about perfect, 60*F and dry. Acceleration and passing power were significantly improved.

I imagine I could've done slightly better had I the patience for actual hypermiling, meaning without A/C gear and passenger and using the cruise control.

 

DSM, That is cool. No CEL lights on either? I told you it had a adaptive ecu. Running C16 once is not going to hurt the short term use in that amount but it could lower the life time of the O2 and CAT. I might experiment with unleaded racing fuel by my house.


I have not started my car since Friday so I expect it to have a hard start tomorrow. The temps dropped 30 degrees than it was when I shut it down.

Where was 91 octane Bp at? Minnesota?

 

I would keep your fit and sell it out right. Trading the Fit, you will lose 3000 minimum. You have a very clean and a really nice car and has been proven to get great mpg. Good luck on negotiating and show pictures when you get the new car.

 

SB, you should come over to the CR-Z forum, I tried bringing up the 93 theory and I got flamed for not searching and all my threads have been covered already, blah, blah, blah Not as nice as FF's which is why I'll be a troll here for quite a while.

One guy says ethanol is bad for your car and it doesn't burn as well, so duh, wouldn't that prove the theory right there? Then there's my facts, they don't wanna hear it.

Pics coming sooner or later

 

Na, that is a tough miss-informed crowd. 87 is the lowest octane that can be used and if were not for ethanol and knock sensors it would not run in these cars. Its about MBT and there is a lot more I could say but people dont understand. 91(96ron) octane ethanol free the highest compression is 8.9. 10 percent ethanol added the highest compression is 9.9. The static compression is around 9.4 in the Fit so the minimum octane is 89. That means there is knock retard and running richer when using lower octane.

The other problem is fuel trims is related to driving styles with engine VE and changing gas with out resetting the ecu you might not see an improvement. Compression is what holds the fuel vapors closer to burn. Premium is denser so it can run leaner and continue to burn. That is why regular gas runs richer because it cant run that lean and retarded spark advance to burn the fuel before knock and richer mixtures to cool and to burn more to produce the same power. Misfires happen when there is more than 5 percent 02(lean). So basically retarding the timing more fuel is needed to produce the same power as running more advance timing with less fuel.

Compression ratios are on the rise again so higher octane is needed. That is why they want to raise the ethanol content with out changing octane stocks to raise the compression limit.

Need to see pictures, it sounds like a cool car.

 

I filled up with BP Ultimate last week, first tank of gas after the original tank was almost used up and after 3 days the average mpg is showing 41.4 mpg. I'll be adding a K&N drop-in filter within 10 days but will not switch to Mobil 1 until about 10k, so that's gotta wait for sure.

The car has an arrow that tells you when to upshift and in those rare occasions, downshift too. I find myself sometimes shifting before the light comes on even. I'm just driving the car normal like always. Now it does have the 3-mode system but the way people are posting about its more of marketing tool than anything but that's not to say it doesn't really do something though. Its more of an "angel on one shoulder and devil on the other one" type deal. When in ECON mode it doesn't rev very quickly and you've gotta shift earlier and while in SPORT mode the speedo light turns red and you get no shift light and it revs alot quicker than in NORM. That being said though, one guy did a test and the mpg difference between the 3 was about the same because the guy drove the same in all 3 modes, so it all comes back to your right foot and how you row through the gears IMO

 

The gasoline has changed from summer. My fuel trims are different and I have noticed higher engine loads but got 40.2 last tank and I ran it down over 400 miles on the tank.

Dont you get a free oil change? You have 0w-20 in the car already so they are using good oil. I would hold off from the KN filter to get a good mpg report, This way you know if it goes up or down.

The Drive by Wire does what it wants most of the time anyways based on how you drive it might operate slower or faster depending on the situation.

41.4 is awesome but what does the math work out too when you filled up?



My wife's car was running bad, the trans was making noise and was not shifting right. I threw in mid grade and the problem went away. The rack n pinion already went out at 13000 miles so I hope the trans dont go out. I have 20000 miles on my car and no problems.

 

Your mpg went up with a K&N Typhoon Intake?

 

I have no before and after numbers per say but what I can tell you is this:

-average mixed driving w/ the a/c on netted me 31.5-33.5 mpg on average
-average mixed driving w/o the a/c on netted me 36.5-38.8 mpg on average

-freeway mileage varied from 38-42 mpg doing 70 mph w/ the a/c on

All of the above is with the K&N typhoon, Magnaflow muffler and wider tires, wheels and offset. I also ran 0w20 Mobil 1 too fwiw

 

SB, atleast check out the "use of premium fuel" thread, its pretty funny, you'd enjoy it!

 

Klasse I'd guess most of the CR-Z's are driving for economy and might not see any benefit using premium. I know when I did three tanks of 93 octane through my Fit I didn't get any increased mpg either, actually my numbers showed a slight drop. I did as others advised also and really rev'd the car out for the first tank full.

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My car is far from being stock so I must use at least 91 octane fuel.. I get about 27.5 to 29 mpg on 93 octane but as high as 33 mpg when I use octane booster ... The cost of doing that isn't economical but the additional ignition advance it provides makes for far better acceleration.. At 39000 miles with all of the performance modifications I have yet to have found it necessary to adjust the valves or replace the coil packs... I'd like to know if anyone that has had to adjust their valves or replace their coil packs at relatively low mileage were users of premium fuel..The only maintenance I have had to do to my car is what is called for in the owners manual.. I have changed to colder spark plugs and adjusted my belt twice since installing the supercharger kit and had to start using 10w30 Mobil1 because of blow by that was causing the ECU to get a lean fuel signal and dump more fuel into the engine... I would miss the 38.5mpg average I was getting if I had to drive more often than I do and the car wasn't so much more fun to drive as it is.

 

Ive been checking it out. My son wants me to get the CRZ next car. I like my Civic though.

Looks like there is a lot of people interested in what you have to say. I might jump in later.

 

There is gains but there is also different situations(Short trips,AC, Lights). The FIT IMEP is 175 at peak Torque so the compression which is around 9.4 on the test fuel Honda uses. The post above is with phillips Ut-96 which is 91 octane alcohol free. The paper I was reading uses that fuel as the base and adds different amounts of alcohols(10 percent) and the octane increases and so does the IMEP. Basically the car detunes from the lower octane. IMEP pressure is lower, lowering power and MPG. Example is, take the Fit the compression ratio (IMEP) is lower than 175 with regular and would still run but have lower power and lower MPG. Running higher octane raises the IMEP that the car uses meaning a more efficient and more power.

Advance timing from the higher octane allows the pressure to raise with no knock like it was made to do. It also runs leaner because no more fuel is needed to prevent knock.

My point is to try different brands and different fuels regular,midgrade, premium (91-91) and the ecu is capable of ultra premium(96) to get better power and mpg. MBT is at higher octane and probably in the middle of the octane chart.