How to Get the Most Fuel Economy

Completely incorrect. Coasting in neutral is using gas to keep engine idle. Coasting in gear does not uses gas at all.
I don't think you are right on this. When decelerating, the engine RPMs are higher and more air is being pulled through the engine. In order to keep the fuel/air ratio in the range that prevents excess NOx emissions, the computer has to add extra fuel. With carburated engines, the extra vacuum causes additional fuel to be pulled through the idle circuit.

Gasoline-engine-catalyst-efficiency-function-of-air-fuel-ratio-300x296.jpg
 
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I have gotten over EPA on the last 3 cars I've driven, by doing a lot of this. I don't do extreme hypermiling, but I've found that if I simply look for opportunities to coast (without hitting breaks or gas), I can do a lot of this. It also has forced me to pay more attention to the road, making me a more attentive driver. I will also try to find that sweet spot right after I shift into my top gear, when going down thoroughfares where the RPMs aren't that high.
 
I don't think you are right on this. When decelerating, the engine RPMs are higher and more air is being pulled through the engine. In order to keep the fuel/air ratio in the range that prevents excess NOx emissions, the computer has to add extra fuel. With carburated engines, the extra vacuum causes additional fuel to be pulled through the idle circuit.

Gasoline-engine-catalyst-efficiency-function-of-air-fuel-ratio-300x296.jpg

Do you have said graph with UNITS?

The big jump on the with catalyst in lean is still lower than without emissions on the lean side, also the graph does not appear to account for EGR levels + catalyst which reduces that spike

Thanks
 
I don't think you are right on this. When decelerating, the engine RPMs are higher and more air is being pulled through the engine. In order to keep the fuel/air ratio in the range that prevents excess NOx emissions, the computer has to add extra fuel. With carburated engines, the extra vacuum causes additional fuel to be pulled through the idle circuit.

Gasoline-engine-catalyst-efficiency-function-of-air-fuel-ratio-300x296.jpg
Fuel cut during closed throttle on FI cars.
 
“Also on moderate hills, if you can keep the pedal steady and bleed off some speed to reach the top, this saves quite a bit compared to maintaining your speed exactly.”

Years ago I kept the cruise control on while on the highway thinking it would give me the best MPG. Wrong. It’s OK for straight and level. I found that slowing loosing some speed going up a grade then slowing getting back up to speed on the downhill side gave better fuel economy in hilly areas.

“I agree with above, and i've done some of that for fun, coasting letting off early etc. But I'm careful not to do it with other cars behind me, I a line of traffic, and idiot trying to hypermile can cause problems and really hold up traffic.“

Yes, you have to be considerate of others and keep up to speed (more or less) unless you are alone or at least in the “slow” lane.

“Not many people can drive this speed and keep their sanity.” (The speed limit).

It is unfortunate that people are always in a rush. Perhaps they can reduce their blood pressure medication if they were able to take life down a notch.

“While, yes, there are habits that you can form that can have your vehicle running more efficiently. When you buy a loaded Expedition, you aren't very concerned about fuel efficiency.”

Let me first apologize but as I am getting older I find myself less able to withstand bashing without commenting. This comment bugs me. Let me say that I have previously bought the least expensive, least “loaded” SUVs all my life. They were all only as big as needed for my usage. This player knows nothing about my usage, needs nor desires. As a naturalist I try better than most to properly recycle, turn on only those lights I am currently using, properly maintain my yard and the preserve area that surrounds me. I do the best to save fuels in the cars that are my hobby. Yes, I am a home body. I do not get on airplanes, fly to distant areas to then get on a bus to a remote area to then canoe for a day. And then return. Who uses more energy? If it bothers you that much live out of your office or very close, instead of commuting. Walk, don’t drive. And certainly never go on a vacation that is more than 2 miles from your home. You cannot change the other person, only yourself. Are YOU really doing the Very Best a person can do to conserve energy?

AEHaas
 
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“While, yes, there are habits that you can form that can have your vehicle running more efficiently. When you buy a loaded Expedition, you aren't very concerned about fuel efficiency.”

Let me first apologize but as I am getting older I find myself less able to withstand bashing without commenting. This comment bugs me. Let me say that I have previously bought the least expensive, least “loaded” SUVs all my life. They were all only as big as needed for my usage. This player knows nothing about my usage, needs nor desires. As a naturalist I try better than most to properly recycle, turn on only those lights I am currently using, properly maintain my yard and the preserve area that surrounds me. I do the best to save fuels in the cars that are my hobby. Yes, I am a home body. I do not get on airplanes, fly to distant areas to then get on a bus to a remote area to then canoe for a day. And then return. Who uses more energy? If it bothers you that much live out of your office or very close, instead of commuting. Walk, don’t drive. And certainly never go on a vacation that is more than 2 miles form your home. You cannot change the other person, only yourself. Are YOU really doing the Very Best a person can do to conserve energy?

AEHaas
That was me!

It's nice that you took a comment about fuel efficiency concerns when buying a vehicle and spun it to a global carbon footprint of someone. In the interest of keep the thread on topic, I'll offer up my inbox to continue your rant. ;)
 
“Also on moderate hills, if you can keep the pedal steady and bleed off some speed to reach the top, this saves quite a bit compared to maintaining your speed exactly.”

Years ago I kept the cruise control on while on the highway thinking it would give me the best MPG. Wrong. It’s OK for straight and level. I found that slowing loosing some speed going up a grade then slowing getting back up to speed on the downhill side gave better fuel economy in hilly areas.

“I agree with above, and i've done some of that for fun, coasting letting off early etc. But I'm careful not to do it with other cars behind me, I a line of traffic, and idiot trying to hypermile can cause problems and really hold up traffic.“

Yes, you have to be considerate of others and keep up to speed (more or less) unless you are alone or at least in the “slow” lane.

“Not many people can drive this speed and keep their sanity.” (The speed limit).

It is unfortunate that people are always in a rush. Perhaps they can reduce their blood pressure medication if they were able to take life down a notch.

“While, yes, there are habits that you can form that can have your vehicle running more efficiently. When you buy a loaded Expedition, you aren't very concerned about fuel efficiency.”

Let me first apologize but as I am getting older I find myself less able to withstand bashing without commenting. This comment bugs me. Let me say that I have previously bought the least expensive, least “loaded” SUVs all my life. They were all only as big as needed for my usage. This player knows nothing about my usage, needs nor desires. As a naturalist I try better than most to properly recycle, turn on only those lights I am currently using, properly maintain my yard and the preserve area that surrounds me. I do the best to save fuels in the cars that are my hobby. Yes, I am a home body. I do not get on airplanes, fly to distant areas to then get on a bus to a remote area to then canoe for a day. And then return. Who uses more energy? If it bothers you that much live out of your office or very close, instead of commuting. Walk, don’t drive. And certainly never go on a vacation that is more than 2 miles from your home. You cannot change the other person, only yourself. Are YOU really doing the Very Best a person can do to conserve energy?

AEHaas
Oh, aren't we being "holier than thou" ! Consider the resources in materials and energy consumed to build that beast, feed it, maintain it, and dispose of it. So go ahead and turn off your lights... LOL
 
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It is unfortunate that people are always in a rush. Perhaps they can reduce their blood pressure medication if they were able to take life down a notch.
My blood pressure went down when I picked up the pace. I was trying to drive the limit in MA but every trip was turning into a white knuckle experience, every trip had a near miss (near hit?). Once I kicked up I found that I was spending less time around the people who couldn't drive--they tended to either drive the limit or slower, or well above the limit. Picking the right speed and avoiding the right lane meant I limited my exposure to them. Driving the limit in NH usually has me nodding off.

A while ago I tried to drive the limit in my car; end result was the fabled 10% bump in mpg. That proven I went back, 10-20% decrease in driving time was fine by me in losing 10% in fuel economy. Considering I typically spend 2 hours a day in the car, it was measurable.
 
The wife and I have several vehicles that are most definitely not designed with the best fuel economy possible in mind. But sometimes it is interesting to see how good of MPG is possible with those vehicles.

We also encounter busybodies who want to tell us how to live, and are critical of our vehicle choices. I would suggest doing what I do; Laugh and ignore them. Or if they're persistent, occasionally I'll say something to really annoy them. They simply don't matter...

Enjoy your cars.
 
+1 on the SMART driving while NOT becoming a road hazard/blocker to others! The 20 accord im driving now has adaptive cruise control. I pull up behind a big rig engage the CC and it follows like a puppy dog in the draft. If the rig hits the brakes the car also does so it is safe. The MPG gauge bounces between 40 and 70mpg max reading with inclines or strong winds.
 
The wife and I have several vehicles that are most definitely not designed with the best fuel economy possible in mind. But sometimes it is interesting to see how good of MPG is possible with those vehicles.

We also encounter busybodies who want to tell us how to live, and are critical of our vehicle choices. I would suggest doing what I do; Laugh and ignore them. Or if they're persistent, occasionally I'll say something to really annoy them. They simply don't matter...

Enjoy your cars.
Reminds me of the media Karen’s that went after the H3 … got the same MPG as many big sellers at the time …
 
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