31/26 mpg after O2 change
Ok results, but before that I will explain exactly how I drove.
Shift: around 2-2.3k rpms
Cruise: Kept it around 1.7k rpms, but higher if in 5th gear + higher speeds
Results 89 miles driven / 3.4 gal = 26.1 mpg
This was mostly street driving with maybe only 10 miles max highway.
Oh and offcourse maybe once or twice I accelerated hard to pass some one or make the next light etc... But 98% of the time I drove such as the above mentioned.
I'd suggest you guys start changing your driving habbits and test out different accelerations, shift and cruise rpm points etc... to see which nets you the best mileage. Maybe we can find a trend of best normal driving for optimum mpg's on the evo.
What should I test next? Maybe I'll give that 4k rpms a try, but can you guys tell me what rpms you cruise at?
Shift: around 2-2.3k rpms
Cruise: Kept it around 1.7k rpms, but higher if in 5th gear + higher speeds
Results 89 miles driven / 3.4 gal = 26.1 mpg
This was mostly street driving with maybe only 10 miles max highway.
Oh and offcourse maybe once or twice I accelerated hard to pass some one or make the next light etc... But 98% of the time I drove such as the above mentioned.
I'd suggest you guys start changing your driving habbits and test out different accelerations, shift and cruise rpm points etc... to see which nets you the best mileage. Maybe we can find a trend of best normal driving for optimum mpg's on the evo.
What should I test next? Maybe I'll give that 4k rpms a try, but can you guys tell me what rpms you cruise at?
Last edited by BluEVOIX; Apr 12, 2007 at 10:33 PM.
Wow, at the 4-4.5 normal shifts...
Well, So far I've driven 75 miles shifting around 2 - 2.3k rpms and cruising between 1.6 - 2k rpms. The gas needle is still above the 3/4 tank line. I'll fill up when it reaches the 3/4 line and devide the miles driven by gallons filled. We'll see how it does in my next fill up.
To be honost, its not fun driving this way, but if it will yeild upper 20's mpg even 30 then why not.
After this I will test shifting at 4k rpms area. What rpms do you guys cruise at usually?
Oh, as for the bogging or stumbling with low rpms, my car doesnt do that unless I go below 1.6-1.5 rpms. But 5th gear I need to keep rpms a little higher around 1.7 to 1.8k rpms area minimum. When I drive I try to accelerate smoothly through out the gears. I shift quickly to keep the momentum going and I noticed it helps a lot for smooth acceleration. Also I give just enough gas to accelerate smoothly and avoid the motor vibrations you get from low rpm high throttling.
Well, So far I've driven 75 miles shifting around 2 - 2.3k rpms and cruising between 1.6 - 2k rpms. The gas needle is still above the 3/4 tank line. I'll fill up when it reaches the 3/4 line and devide the miles driven by gallons filled. We'll see how it does in my next fill up.
To be honost, its not fun driving this way, but if it will yeild upper 20's mpg even 30 then why not.
After this I will test shifting at 4k rpms area. What rpms do you guys cruise at usually?
Oh, as for the bogging or stumbling with low rpms, my car doesnt do that unless I go below 1.6-1.5 rpms. But 5th gear I need to keep rpms a little higher around 1.7 to 1.8k rpms area minimum. When I drive I try to accelerate smoothly through out the gears. I shift quickly to keep the momentum going and I noticed it helps a lot for smooth acceleration. Also I give just enough gas to accelerate smoothly and avoid the motor vibrations you get from low rpm high throttling.
My car doesn't stumble, it bucks. For instance, if I keep it at 1800 RPM in first gear it will slowly start to buck becoming more pronounced over time. To be technical, the amplitude of the bucking increases but the frequency does not. I am not modulating the throttle, there just seems to be some sort of harmonic that it doesn't like under those conditions. I can cruise in 3rd-5th at that rpm without issue or any gear above about 2k. Of course this doesn't matter except when in stop and go traffic (< 10mph) but it is very annoying at those times. I have always felt that the car just hates to be caged and prefers to run.
I may also not have the most normal driving conditions. On my daily commute, I have to get through about 15 minutes of horrible stop and go traffic before I hit the interstate where I typically cruise at 80-85 for the next 10, then on the parkway where I cruise at 60-65 for the last 10. Going home is the reverse. That makes my "cruise" RPM anywhere from 2800-3600 which is probably a bit high (for efficiency). I suspect that if I slowed down on the interstate, I could average closer to 23 mpg, but I have a lead foot.
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Joined: Aug 2003
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From: Riverside, CA
Nobody has mentioned what they consider "a tank" to be, or how they reach their MPG figures except one person. I think the low gas light in an EVO indicates at least 5 more gallons to go (most cars is 2-3 gallons) and the reading can vary too. So guesstimating produces absurd things like 36 mpg or 8 mpg.
Best way to do it is to fill up the tank all the way until the gas pump clicks once. Wait a few seconds, squeeze it again until it clicks. Give it another few seconds and p ut the nozzle back in t he pump. Reset your odometer to 0. Next time you get gas, which can be any time, do the same thing. Divide the number of miles driven by how many gallons went in and you get your MPG. Most people will probably find it is much lower than they expect.
So in the case of my Miata, I drove 220 miles and put in 10.9 gallons. 20.1 MPG.
Best way to do it is to fill up the tank all the way until the gas pump clicks once. Wait a few seconds, squeeze it again until it clicks. Give it another few seconds and p ut the nozzle back in t he pump. Reset your odometer to 0. Next time you get gas, which can be any time, do the same thing. Divide the number of miles driven by how many gallons went in and you get your MPG. Most people will probably find it is much lower than they expect.
So in the case of my Miata, I drove 220 miles and put in 10.9 gallons. 20.1 MPG.
If I were to shift at 2-2,3 rpms it sounds like my enigne is bogging down. I have a greddy Ti exhaust with full 3 inch test pipe and down pipe. I think shifting at 2-2.3 is too low, puts too much of a strain on the engine..
Well I dont know if stumble is the right word. But lets just say I notice more engine vibrations if I keep the cruise in 5th gear below 1500 rpms, or try to accelerate below 1600 rpms.
Nobody has mentioned what they consider "a tank" to be, or how they reach their MPG figures except one person. I think the low gas light in an EVO indicates at least 5 more gallons to go (most cars is 2-3 gallons) and the reading can vary too. So guesstimating produces absurd things like 36 mpg or 8 mpg.
Best way to do it is to fill up the tank all the way until the gas pump clicks once. Wait a few seconds, squeeze it again until it clicks. Give it another few seconds and p ut the nozzle back in t he pump. Reset your odometer to 0. Next time you get gas, which can be any time, do the same thing. Divide the number of miles driven by how many gallons went in and you get your MPG. Most people will probably find it is much lower than they expect.
So in the case of my Miata, I drove 220 miles and put in 10.9 gallons. 20.1 MPG.
Best way to do it is to fill up the tank all the way until the gas pump clicks once. Wait a few seconds, squeeze it again until it clicks. Give it another few seconds and p ut the nozzle back in t he pump. Reset your odometer to 0. Next time you get gas, which can be any time, do the same thing. Divide the number of miles driven by how many gallons went in and you get your MPG. Most people will probably find it is much lower than they expect.
So in the case of my Miata, I drove 220 miles and put in 10.9 gallons. 20.1 MPG.
I calculate my mpg's by taking the actual miles driven and dividing it by the number of gallons filled. And every fill up I stop at the first click. Some times I might go over .20 cents more to even out the dollar amount, but no more than that.
Tips for good gas mileage:
- accelerate briskly (not WOT) until you get to your final speed. For our Evos that probably means shifting around 4000 rpm
- do not tailgate - drive smoothly. Leave room between yourself and the car in front of you. The more you have to stop and re-accelerate the more fuel you use.
- do not clutch in when coasting to a stop. Leaving the car in gear as long as possible consumes no fuel at all, clutching in will have the engine idling
- add a little bit of extra air pressure to your tires. less rolling resistance will equate to better mpg
- anytime you are standing for more than 5 seconds, turn the engine off. Yes this does save gas, but it's harder on other components, so I personally think this is bogus.
These are some tidbits I picked up from a German program a while ago. They actually have schools for this - f'ing green gestapo... Not that I necessarily do any of these, but food for thought for anyone that wants to save some pennies on gas - though, IMNSHO ya should've bought a diesel or hybrid if you were worried about gas costs.
l8r)
- accelerate briskly (not WOT) until you get to your final speed. For our Evos that probably means shifting around 4000 rpm
- do not tailgate - drive smoothly. Leave room between yourself and the car in front of you. The more you have to stop and re-accelerate the more fuel you use.
- do not clutch in when coasting to a stop. Leaving the car in gear as long as possible consumes no fuel at all, clutching in will have the engine idling
- add a little bit of extra air pressure to your tires. less rolling resistance will equate to better mpg
- anytime you are standing for more than 5 seconds, turn the engine off. Yes this does save gas, but it's harder on other components, so I personally think this is bogus.
These are some tidbits I picked up from a German program a while ago. They actually have schools for this - f'ing green gestapo... Not that I necessarily do any of these, but food for thought for anyone that wants to save some pennies on gas - though, IMNSHO ya should've bought a diesel or hybrid if you were worried about gas costs.
l8r)
Tips for good gas mileage:
- accelerate briskly (not WOT) until you get to your final speed. For our Evos that probably means shifting around 4000 rpm
- do not tailgate - drive smoothly. Leave room between yourself and the car in front of you. The more you have to stop and re-accelerate the more fuel you use.
- do not clutch in when coasting to a stop. Leaving the car in gear as long as possible consumes no fuel at all, clutching in will have the engine idling
- add a little bit of extra air pressure to your tires. less rolling resistance will equate to better mpg
- anytime you are standing for more than 5 seconds, turn the engine off. Yes this does save gas, but it's harder on other components, so I personally think this is bogus.
These are some tidbits I picked up from a German program a while ago. They actually have schools for this - f'ing green gestapo... Not that I necessarily do any of these, but food for thought for anyone that wants to save some pennies on gas - though, IMNSHO ya should've bought a diesel or hybrid if you were worried about gas costs.
l8r)
- accelerate briskly (not WOT) until you get to your final speed. For our Evos that probably means shifting around 4000 rpm
- do not tailgate - drive smoothly. Leave room between yourself and the car in front of you. The more you have to stop and re-accelerate the more fuel you use.
- do not clutch in when coasting to a stop. Leaving the car in gear as long as possible consumes no fuel at all, clutching in will have the engine idling
- add a little bit of extra air pressure to your tires. less rolling resistance will equate to better mpg
- anytime you are standing for more than 5 seconds, turn the engine off. Yes this does save gas, but it's harder on other components, so I personally think this is bogus.
These are some tidbits I picked up from a German program a while ago. They actually have schools for this - f'ing green gestapo... Not that I necessarily do any of these, but food for thought for anyone that wants to save some pennies on gas - though, IMNSHO ya should've bought a diesel or hybrid if you were worried about gas costs.
l8r)
I think I'll test that out next, but I still dont know what rpm to cruise between. I think as low as possible while keeping the engine running smoothly.
Oh, as for worrying about the mpg's: Whats so bad about having best of both worlds? Fast and high mpg's dont usually mix together, but why not try and make it happen? Saving on mpg's could also mean more money for mods, right?
Think about it in terms of riding a bicycle. If you're stuck in too high of a gear, you're going to have a hard time "cruising". I don't think you're going to save much gas if you're trying to cruise along at 1500 rpm. Everytime you step on the gas, you will be wasting a lot of energy trying to overcome high gearing. 2500 rpm should be a good cruise rpm for your average Evo, IMO.
l8r)
l8r)
I did a 4 gear log, plus before that a couple of pulls to pass slower cars; 247 miles on 12 gallons......... it shows that just a couple of hard pulls will severely drop your mpg, so for the people that complains about getting only 22 and 18 mpg stop driving hard and you'll see atleast 25mpg if everything is working properly.
Brisk acceleration is bull****. I did that and saw the gauge go down quicker, so I mixed in more highway miles and averaged 19 mpg because of that.
Slow, smooth acceleration with low rpm shifting and cruising is the key.
You people have widebands right? So then you should see that even in lower rpms you still get a stoich a/f ratio of 14.7 . So common sense tells you that 14.7 a/f ratio at 2.2k rpms consumes less gas than a/f of 14.7 @ 3.5k rpms. (with the same amount of throttle for both cases)
Slow, smooth acceleration with low rpm shifting and cruising is the key.
You people have widebands right? So then you should see that even in lower rpms you still get a stoich a/f ratio of 14.7 . So common sense tells you that 14.7 a/f ratio at 2.2k rpms consumes less gas than a/f of 14.7 @ 3.5k rpms. (with the same amount of throttle for both cases)