Most Efficient Auto Car

[red91sit]

1. UfoTofU -
2. repete86 -
3. lindermant -
4. OdieTurbo -
5. zpilito -


:EDIT: current scoreboard, I will try to keep an Eye on this, but I'm rather busy lately with graduation, So feel free to PM me, if your number 5, or for any other reasons.

I was wondering who has the most fuel efficient Automatic Transmission car on this forum? I thought we could have our own fun little competition.

Just taking the numbers from the Fuel Competition, Zpilito seems to have the most gas friendly A/T car! at 42.44.



Anyone got anything higher than this?

::EDIT 2:: I shoudl have clarified this, the scoreboard is for Gasoline powered only vehicles, electric propulsion assistance is not included.

[zpiloto]

Originally Posted by red91sit

I was wondering who has the most fuel efficient Automatic Transmission car on this forum? I thought we could have our own fun little competition.

Just taking the numbers from the Fuel Competition, Zpilito seems to have the most gas friendly A/T car! at 42.44.



Anyone got anything higher than this?

Percentage EPA wise Repete86 and his Accord put me to shame then there's omgwtfbyobbq in the Camry.

[lovemysan]

odieturbo is running an unmolested saturn around 40mpg. I'm not sure what his driving style is or if he's modded it yet.

[OdieTurbo]

Originally Posted by lovemysan

odieturbo is running an unmolested saturn around 40mpg. I'm not sure what his driving style is or if he's modded it yet.

Thanks lovemysan, so far I've only pumped the air in the tires up to 45 PSI. As to driving style, keeping it at or under the speed limit (at 65 MPH on the highway, I'm the slowest guy there!) Easy on the throttle, no more than 2500 RPM max.

I've got some mods in mind, I was waiting to get in the FE competition (I'm now in it), and saving up some $$$.

See "The_Last_SL1" for a list of mods I plan on.

[lovemysan]

Originally Posted by OdieTurbo

Thanks lovemysan, so far I've only pumped the air in the tires up to 45 PSI. As to driving style, keeping it at or under the speed limit (at 65 MPH on the highway, I'm the slowest guy there!) Easy on the throttle, no more than 2500 RPM max.

I've got some mods in mind, I was waiting to get in the FE competition (I'm now in it), and saving up some $$$.

See "The_Last_SL1" for a list of mods I plan on.

I just checked your gaslog. Nice and consistant. You must be pretty careful to lock the convertor up. Diamondlarry was saying there's a trick way to lock the convertor in 2nd gear. You might pm'him about it.

It takes about 10min and 300 clicks to fill an SL tank.

[omgwtfbyobbq]

My Camry doesn't count, the EPA highway is wayyyy off compared to cruising with the tcc locked, and I have pretty nice driving conditions. I'd love a Saturn, w/ being able to coast four down. Given engine-off coasting opportunities, I'd be able to go from ~35mpg to ~40mpg. Course, that's nowhere near the 50-60+mpg I'd expect from a manual transmission w/ the right OD gearing, but it's still nice. I wonder if bump starting Saturns is easier on the engine w/ autos compared to manuals, with the fluid coupling and all?

[Bill in Houston]

I don't think that AT cars can be bump started. They tend to go into neutral if the engine isn't spinning. Maybe I missed something.

Anyway, since it seems that most people buy AT cars, I hope that the manufacturers can make them a lot more efficient, and quickly.

[ELF]

We used to bump start auto's back in the old days. when we had sub zero temps a lot of cars would not start due to weaker batteries and starters that needed more power than current ones. we used a tow rope or chain and had to get going about 40mph before the engine would start spinning.
I would think that would be pretty hard on the tranny though.

[omgwtfbyobbq]

I was thinking it'd be easier on the engine than bump starting a manual, since the fluid coupling has more give than a direct mechanical connection, and the transmission would naturally drop into whatever gear, but i dunno crap about autos, so that's all speculation.

[bzipitidoo]

So far, according to the Scangauge, the best I've gotten in my recently acquired '99 Metro with an auto tranny is 45.6 MPG. That was average over a 25 mile trip, at night (but the thing has daytime running lights so I can't see headlights making much difference), and in the rain. Maybe the humidity helped?

Been managing 40 MPG nearly every trip.

[zpiloto]

Curious how many of the auto are EOC'ing?

[repete86]

I do. You can start the motor back up while moving in neutral, but you need to hold it in start for a second longer than normal or else the engine will stall and refuse to start for about a minute.

[red91sit]

Originally Posted by ELF

We used to bump start auto's back in the old days. when we had sub zero temps a lot of cars would not start due to weaker batteries and starters that needed more power than current ones. we used a tow rope or chain and had to get going about 40mph before the engine would start spinning.
I would think that would be pretty hard on the tranny though.

On old automatic transmissions they had a pump working both ways, so that you COULD bump start them like you said. Since the 80's though, I dont' think any automatic transmissions have this feature

[OdieTurbo]

Originally Posted by zpiloto

Curious how many of the auto are EOC'ing?

Just started doing it! Finding more and more opportunities as well. I would like an engine kill and engine start button though. Diamondlarry just pm'd me how to put in an injector kill, I'll get that hooked up ASAP!

[UfoTofU]

My CRX is auto and you can see my average below in my signature.

I have recently moved to a more congested area so that is undoubtedly going to change my MPG. I haven't gone through a full tank yet at our new address though.

[red91sit]

Wow! there are some really exceptionally good gas mileage auto's on here! I'm hoping my gas mileage will go up soon, I'ts hard to get around to working on it with so much else going on (graduation next friday woot woot)

[SVOboy]

fuel economy forum
vegan recipes
green home improvement
honda gas mileage

[bobski]

Another auto CRX here. I've hit 42 mpg on long highway trips, cruising at around 75 mph. I generally get 34-37 in day to day driving. This is with a D16Z6 swap (done for power rather than FE) and the lockup solenoid wired to ignition switched power.

[striegel]

The Scion xB has an automatic and I'm using engine-off coasting daily during my commutes. I just got a ScanGauge II about a week ago and have begun to watch the instantaneous MPG and tank average. Today I managed to attain 40.3 mpg overall for my 26 mile roundtrip. That feels like progress.

[red91sit]

Gotta start posting your fill ups in the gas logs

[OdieTurbo]

Originally Posted by red91sit

1. zpilito -
2. UfoTofU -
3. repete86 -
4. OdieTurbo -

Must... get... better... mileage...!!!

[red91sit]

Originally Posted by OdieTurbo

Must... get... better... mileage...!!!

lol, your telling me, my last fill up was under 30 :'(. But for the next one, Im gonna use a FULL grill block, and just use an old a/c fan to suck in fresh air. Should work

[lindermant]

best tank on my '05 civic auto was 50mpg (last summer)... I've been slacking a bit and not posting too much here lately, but I did just update my gaslog

[red91sit]

And we have all top 5 spots filled now! Time to see some competition up there. Hopefully I'll get there someday, but I haven't driven my car since last Saturday.

[red91sit]

Ooh We've had some changes to the leader board!

[Hockey4mnhs]

i love how we compete! i really want to make that list but it will be a while

[OdieTurbo]

Woohoo! I just hit 47.58 MPG on my last trip! Yay me! I rock! Wort wort!

[StanleyD]

Originally Posted by Hockey4mnhs

i love how we compete! i really want to make that list but it will be a while

I recently has 36+ mpg tank (Best ever) which I feel is excellent considering I was doing 27+ a couple months ago and 29 when I joined this site. I know I'l never make that list with "98 Camry" as the car is just to big compared to others gas-miser cars on this site. But it still feels good getting these mileage numbers. My goal is a 700 mile tank and 40 mpg.

Originally Posted by zpiloto

Curious how many of the auto are EOC'ing?

I heard (from users HERE) that its NOT good to EOC in an automatic unless your car is capable of being towed at regular speeds. I never knew that autos has issues with being toed on four wheel. Anyway, its not good for an automatic to be pushed/pulled and roll (Hence EOC) without the engine being on because your fluids responsible for lubing the tranny are not flowing. Please be care ODIE and make sure that EOC is not damaging your tranny. You should idle coast instead of EOC.
What is everyone else's take on this? There is a thread on this. Wish I knew where it was

[Hockey4mnhs]

i do a little eoc maybe 20 miles a tank if that. im to take a little risk to get a record tank but i wouldent do it all the time.

[Rick Rae]

Originally Posted by StanleyD

...its not good for an automatic to be pushed/pulled and roll (Hence EOC) without the engine being on because your fluids responsible for lubing the tranny are not flowing... What is everyone else's take on this?

I can toss in some info from far left field. Due to odd (and I hope temporary) circumstances, my SG is currently reporting transmission temperature instead of engine temperature.

Monday I drove about 150 miles with a clear sky and afternoon temperatures in the high 90s. The AT would normally run about 215F to 225F. However, during NICE-ON glides it would quickly climb to 230F or 235F. IIRC the highest temperature logged for the day was 240F.

I figure this is because the pump is circulating the transmission fluid more slowly at engine idle so heat has more of a chance to build up. No idea where the AT temperature sensor is located though, so that theory could be bogus. Regardless, it's another factor making me uneasy about neutral coasting in my car.

At any rate, on a VW Cabrio (Golf III platform) at least, even gliding in neutral with the engine on likely adds extra stress. I can only imagine what would happen with the engine off when there's no flow at all. (I can only imagine 'cuz I ain't tryin' it. Except for 20 foot gravity starts from a parking space or the last five feet rolling into position after keying off.)

Rick