E and MPG

[Printman]

Damn wish I had your car. I can drive like a granny with 30% E and barely get over 220 miles to a tank. But, I rarely drive like a granny on E, LOL. That must be my problem. Great MPG numbers @mrshoulders;

[Enki]

3/9 mix isn't that much to be honest. Some cars don't even require a recal for it, depending on the seasonal blend you're on or the e content of the pump gas.

@johnnyboy05gt; is getting hilariously bad mileage right now (less than 200 per tank on 50/50), and after his tune is done I'll do my current MPG tune changes and we will see what gain he gets from it.

[johnnyboy05gt]

Today i drove total of 25 miles and used 1/4 tank. on my way home i will be easy on it and use about another 1/8 tank. idk whats going on but i think my fuel line is hooked straight into my downpipe

[Enki]

Get me a log of a full trip. Turn everything on logging wise from within the AP logging menu.

[Redline143]

Just an update:

Going from E40 to E35 got me about 2mpg more, mixed mileage driving.

I did my valves recently too, and altogether I'm getting about 3.5 or so more average mpg (2 from going to E35 and 1.5 from the valves).

[MS6 Sanchez]

Just saw this and thought it's some retarded propaganda ImageUploadedByTapatalk1368079294.831365.jpg

[sidekick]

LOL @ that ad. They are so detailed...

[Cheapspeed]

50/50 with a few single gear wot pulls and then highway cruising I got about 260miles before my light came on.

My tires are also slightly taller than stock which hurts acceleration but keeps my rpms slightly lower at speed.

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[Cheapspeed]

286 miles on 50/50 and light didn't even come on. Pretty sure I could've gotten 300 on a tank and that was including 4th gear WOTs for logs and a/c usage.

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[tbcota25]

267ish miles with my first fill up (base map) 33% mix

[g00s3y]

Just got 253 miles out of my last tank, running full e85.

[hookemdevils22]

how big is the tank in the MS3? I get 275mi/tank in my 6, for an average of just under 20 mpg (mostly highway) on a stage 2+ tune with 91. sounds like I wouldn't see much if any hit by switching to E.

[Enki]

Genwon holds 14 IIRC. Hits E at 12 though.

[cld12pk2go]

I tend to get ~260-270 miles per tank with 6 gal E85 per tank in mixed driving. ~21MPG is typical.

I do get lots of smiles per mile though...

[chaser27]

0% mix of E
I've gotten anywhere between 7 and 34 mpg for a tank.

[Enki]

Currently running full E85.

Miles /// Gallons /// MPG
214 /// 11 /// 19.45
260 /// 12 /// 21.66
201 /// 10.5 /// 19.14

Mostly blue pic is my VVT configuration (no VVT during cruise/light accel)

Other pic is my closed loop fueling:
1.1 = 16.17 AFR
1.05 = 15.435 AFR
1.025 = 15.067 AFR
1.0 = 14.7 AFR

[Enki]

Just under 892 miles now;

Last fillup:
216.6 miles on 10.45 gallons
20.72 MPG, with lots of WOT.

[davychronic]

that lean burn map looks good for highway driving, have any noticable temperature issues at 1.1?

[Enki]

Nope.

[davychronic]

How many miles do you think you can achieve to a tank with mostly conservative driving? I just finished my e30 tune and im thinking about stepping up to e50 since the gas stations around here offer e30, e50 and e85. I havent seen any mpg loss at e30, still get about 380 miles to the tank.

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[Enki]

On full E85, probably same as stock if not a hair better, assuming highway mpg @ 80.

[davychronic]

Thats good to know, so I shouldn't expect any loss from e50 then. Thanks for the info.

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[Enki]

Assuming you drive conservative and have tuned for it yeah, you shouldn't. There's a video earlier in this thread I think that shows me getting 27/28 MPG per the AP on 50/50 mix at 75 MPH with the AC on.

[davychronic]

I live in the middle of nowhere, so i do all highway, very little if any city driving. I can do 4th gear logs less than a mile from my house so it makes the tuning process much quicker. How is your idc on e85?

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[Enki]

Doing what? I'm big turbo and on aux fuel.

[davychronic]

Makes sense, I figured e85 would max idc on the k04.

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[Enki]

Not usually, but it will get pretty close depending on elevation and targeted AFR.

[davychronic]

Have you run lean burn maps on mixes?

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[Enki]

Yes. There are guys running pump gas on 17:1 targets for cruise, but IMO efficacy falls off sharply after 16:1.

[davychronic]

Thanks for the info, I want to give this a shot before i step up to e50.

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[Speed2006]

I generally get around 22 MPG running highway speeds (75mph). Around town, averaging about 15 mpg. This is in a Speed6 running a 50/50 mix

[cld12pk2go]

I get about 21 MPG on 6.5 gal E per tank here with 80% highway driving...

MPG sucks, but my Smiles Per Mile (SPM) are pretty sweet.

[Mazdazilla6]

I'm not sure if this is the best thread to put this in but it's relevant and I don't want to bump an old mpg thread.

For all of those people concerned about lean cruise running hotter and possibly causing damage. That is a misconception and running a lean cruise will actually burn colder than running at stoich. It is possible to actually run lean enough to run into something called cold lean where the engine cannot combust the fuel properly (typically 18:1 or above) because there isn't enough fuel and the large amount of air will cool off the combustion chamber. The reason why cars run at stoich from the factory is because the catalytic converter will get ruined if the engine runs lean or rich for an extended period of time. So if you're catless there is no harm in running a lean cruise so long as you tune for it properly.

THIS IS NOT THE SAME AS RUNNING LEAN AT WOT!

[Speed2006]

Along those same lines, I found something interesting with my highway cruising coolant temperatures. When I ran straight 93, I found that my coolant temp hovered between 180-190⁰F during normal highway speeds and an 85⁰F ambient temperature. Now, in those same conditions running 50/50 mix, I find that my vehicle reads between 165-175⁰F. I understand that alcohol fuels burn cooler, but I am not certain if my coolant temps should have dropped that much. Is that common? I just worry a tiny bit about the block being aluminum, and not having the temps be hot enough to maintain the tight tolerances.

[Cheapspeed]

Originally Posted by Speed2006 Along those same lines, I found something interesting with my highway cruising coolant temperatures. When I ran straight 93, I found that my coolant temp hovered between 180-190⁰F during normal highway speeds and an 85⁰F ambient temperature. Now, in those same conditions running 50/50 mix, I find that my vehicle reads between 165-175⁰F. I understand that alcohol fuels burn cooler, but I am not certain if my coolant temps should have dropped that much. Is that common? I just worry a tiny bit about the block being aluminum, and not having the temps be hot enough to maintain the tight tolerances.

Um...you shouldn't have a problem keeping 180-190* coolant temps. When was your thermostat last changed?

My car ran as cool as 155* cruising on the highway when it was fully open 20*F weather.

[PurplFox]

On the mileage note gen juan, freek E getting about 280-290 per 13 gallons on e33. only a 10 mile per tank diff from the 93 tune

[Enki]

He could go further if he wanted to, MPG wise. I was getting 28 on the highway on 50/50; grant it, aero and drafting had a bit to do with that but still.

[Mazdazilla6]

Originally Posted by Speed2006 Along those same lines, I found something interesting with my highway cruising coolant temperatures. When I ran straight 93, I found that my coolant temp hovered between 180-190⁰F during normal highway speeds and an 85⁰F ambient temperature. Now, in those same conditions running 50/50 mix, I find that my vehicle reads between 165-175⁰F. I understand that alcohol fuels burn cooler, but I am not certain if my coolant temps should have dropped that much. Is that common? I just worry a tiny bit about the block being aluminum, and not having the temps be hot enough to maintain the tight tolerances.

The cooler temps are not from running alcohol. The engine temp is regulated by the thermostat so regardless of what fuel you're running it should always be at the same operating temperature.