I also use the scan gauge, its paid for it self over and over. I only wished that it would display fuel air, short/long fuel trims, but if it did that it would be programmable. I do coast but the lifting of the gas pedal is still maintaining highway speeds. I am just happy to get the mpg back up and its as easy as changing shoes.

My car accelerates better when a little pressure is giving compared to full throttle. But after a few throttle passes it does drive better full throttle compare to part throttle. That the adaptive learning capability's of the ecu. The only problems is mpg also drops but you have more power available. Its take a few days to detune back the economical settings.

 

The DBW throttle has slow response but with an electronic throttle controller you can make it respond much slower or faster.... I usually drive with mine in the slowest responding EC5 mode and keep an eye on the throttle position readout as a means of keeping the exhaust noise down and to improve fuel mileage... We are thinking about motorizing a couple of our bicycles real soon before there is a rush on the kits... I know I am going to want to kick myself for the 6 mpg I have lost in my quest for more power. Still 31 to 33.5 isn't terrible.

 

I change my shoes because I cant drive my car with the big heavy steel toed boots that I am required to wear on my job. I use to wear gym shoes but because the bottoms are flat and I did not have the feel of the pedal like I do with the rubber treaded shoes that I wear sometimes. I just wanted to put that out because there is a difference between shoes. With gas prices going up everything is relevant to getting better mpg.

 

Converse All-Stars hi-tops work great for me. Now if they only offered them in nomex. Converse Shoes, Monochrome Chuck Taylor Hi Tops - Shoes - Men's - Macy's

 

You're confirming my experience with my FIT. It's all in the ECU. It gets to know how you drive, but does take a few days or drive cycles to change it's tune. Winter is here, and I first saw a drop in MPG, but I'm seeing it come back to close my summer average. Of course it's only the first week of the new year and there's still February, but my FIT's ECU keeps proving itself.

I'm resisting adding goodies like throttle control. It's tempting, but I'm liking what it came with. I can always, and occasionally do, slam down a gear or two and get on it to go fast enough to get a jump on traffic and be no where near red line, otherwise I'm after perfectly happy w/ 38mpg on 87octane.

 

I am still using premium, mainly because I see the difference after a tank and kick myself every time I try regular. My mpg does go down and seen it on the scan gauge. Its colder here I think most of the time and we have RFG gas for 20 years with less btus than just E10 gas. I think the reason my mpg is going up is that the gas is finally winter gas, the summer gas has more aromatics which cause problems and it freezes at a lower temperatures and that why they use butane, iso butanes more in the winter. If it weren't for the warm ups and lights my mpg would be similar to summer maybe a few less compared to 20 percent.

 

29.7 mpg on my last tank, but that had a little bit of freeway runs on there, had to go out and meet someone to sell my buddy's tires. Hey SB, I took your advice just to see what mid-grade would do, so I'll report in next week with the results on that one. The tank was almost empty as the light was on and it took a little over 9 gallons to fill it up. I have noticed right away that the trans doesn't shift as firmly as before, so IMO what you said about the ecu is true

 

Recieve a $10 gift card when you fill up @BP (8 gallon min) Now I know most of you don't let your car go down that low in the winter and I bet if you go to the same BP they know you and will probably hook you one up with less than that. I take my work van there and it takes $80.00 to fill it up, a bit more now that the prices have gone up yet again, so I'm taking my van there and keeping the rewards cards for myself (shhhh, don't tell anyone)

So far my OBC is showing almost 29 mpg with the 89 octane mid-grade, so it might be my fuel of choice right now. I will say that the trans is still shifting firmly, so we'll see how it goes.

I do like the temps in the mid to upper 20's though, better than what we had around Christmas time (knock on wood!)

 

My mpg is almost summer mpg. I am getting around 35 mpg, and that includes warm ups to clean windows and mix driving. I am figuring they got fresh fuel recently. If my next tank runs the same way I will be very happy.

 

I have noticed that the ignition advances less when driving slow all of the time and have always accelerated to 80 or 90MPH and gradually brought the speed back down when I drive anywhere... I know that everybody can't do that but since I can and do I also notice that doing so allows more ignition advance, more low end torque and better fuel mileage when I am going easy on the throttle pedal and only slowly winding to 4000 RPM before shifting to the next gear.

 

I will have to check out the 10.00 gift card out. I had to change gas in my wifes car over the weekend. I started it and it was running bad and making noise so I had a 5 dollar gift card and threw it in premium and then top it off mid-grade. The car runs fine now and I noticed that my wife actually pays attention to the road instead of trying to do things that distracts her. We where on our way to see my mom and she had slow down because the car was getting away from her. It was different than what she was use to.

 

SB, the advice of trying mid-grade has actually worked out pretty well, get this, I got 31.3 mpg on my last tank!!! I know its been a little warmer lately this past week, but today starts the slide down....waaaaaaaaaaay down as its going to be 0- -9 below zero tonight. I have not been letting it warm up for 15 minutes anymore either because it really doesn't need to warm up that that long and it just wastes gas IMO. The blue "cold light" goes out about a mile down the road and it does warm up pretty quickly, we'll see how it goes tomorrow morning

I must say this too, once I topped off yesterday with Ultimate yesterday, the trans started shifting even firmer once again, not that the 89 didn't shift firmly, but not as firm as the 93....THERE IS SOMETHING GOING ON WITH THIS GAS, NO DOUBT ABOUT IT!

 

I am getting better mpg even today. I made a few observations that might help. Make sure all accessories are off before shutting motor. What a minute before turn heat on after start up, engine is cold so no heat and just blowing cold air. I coasted down the drive way and accelerated slowly getting out of subdivision.

I always get better mpg going to work and I figured it out. Its shorter to the highway and the car warms up on the highway. I left work and it 6 miles to the highway so thats lots of idling when engine is cold. On the way to work the engine is already warm so the mpg loss is not that great. Short trips really hurt mpg and the cold too it runs up to 20 percent richer depending on temps. Engine load also effect mpg. It took 10 miles or 20 minutes before the load fuel to stabilize. Any thing over 70 percent was like 2 plus gallons an hour at low speeds. At 60 mph it would float between 50-80 load and between 1.5-2 gallons an hour. I am getting 36 on the way to work and 32 on the way home. I also put Amoco ultimate and the station must of got fresh gas, That something you would recognize going to the same station.

Klasse/Act your cold air kit is hurting your mpg. The colder the air the more fuel needed, You might want to put cardboard over some of the radiator near the intake.
I am glad the cold air is only for a day and half compared to weeks, but that might happen later.

I wish the scangauge would tell the A/F ratio and fuel trims to see whats happening in real time, but it does gallons per hour so you can still have a clue.

 

My drive to work is about 45 minutes, going from some lights and then, once out on 159th through Homer Glen, the lights are far and inbetween. I go through Lockport and try to not get stuck for the train but if I don't, I just coast down the bridge on 9th street. I'm pretty easy on the car, I coast up to red lights all the time, so "hyper-miling" is built in I just wonder how my mileage went up to 31.3 mpg compared to my previous best of about 28 mpg the week before.

I'm going to watch my OBC this morning and see how the mileage goes with the ZERO temps out right now. I plan on letting the car warm up for about 2 minutes and then I'm heading out. I have 0w30 Mobil 1 so I'm letting the oil do what its supposed to. BTW, I'm at 20% oil life and I've got 8k on this oil right now and I'm planning on getting the Blackstone Lab oil test so I can see what's really going on in there. I've got my oil and filter already bought for the next change, 0w20 Mobil 1 and Royal Purple 100% pure synthetic oil filter. Once I put the slightly thinner, OEM warm weight oil in, we'll see how that affects the MPG's

 

I can no longer get 0w20 Mobil 1 in my area and haven't for some time. I did pick up 18 qts of 0w30 Mobil 1 at half price at my local O'Riley's and that is what is in the Fit right now along with a Honda filter. I don't think you will see any change in your mileage based only one a switch from 0w20 to 0w30. To many other factors to really notice a small change.

 

Well... thats not entirely true. With a 0w20 at operating temperature the engine only has to overcome the internal fluid friction of a 20w oil. Which is roughly 2/3 as viscous as the 30w.

They are both a 0w at 32F which means they should both help cold starts though.

 

So you are saying Klasse Act will find a noticeable increase in fuel mileage when switching from the 0w20 and 0w30?

 

He should in theory see an increase in efficiency switching to the 20w. Both however will be good on start up as a 0w.

So the difference will be more pronounced at operating temperature, and it should reduce pumping losses vs the 30w.

 

I figure a 1 percent gain, but the valve train might be a little louder due to a thinner oil.

 

I was surprised today with the extreme cold. My car idled 15 minutes this morning with no accessories on and I figured I lost all hope of breaking 27 mpg, I ended up getting 32 mpg on the way to work and 33 on the way home. I also noticed that at 55 mph I could get 50 mpg. At 63-70 I get 37-40 with the cruise control on. Because of the stop lights, I lost 20 mpg but I am narrowing it down to whats using the most gasoline. It seems take offs on a cold motor, it takes 10 miles of highway before I see the SG settle down and the mpg going up faster.