Hi, I know you guys have too much discussion regarding gas in this forum...

BUT, I want to ask why is it that I CANNOT get my RANGE to 520ish when the gas tank is full?

I recently took a 350 miles trip about 90% Highway but that range don't come up even 400 miles compares to when I first got the car...

Typically, the computer do update Range based on how i drive and if I am on a freeway but recently, I can't get that number over 350 range.

I still have 50% of my engine oil left and I believe my PSI is 36 front and 34 back wheels...

I know it has to do with maintenance, usage, and it varies with how you drive... how i can make the range back to when I had 500 ranges with at least on the highway..

and oh, my car's life avg MPG is 23.8 as of now without ever resetting the thing... since I live in LA, i have to deal with the traffic and doing city driving about 85% of the time.

I plan on using tank cleaner soon just to see if it works (i know it's useless but a placebo affect perhaps?)

And oh, I get the best mileage when I use Shell... I think it does matter what brand I use... I find 76 better than chevron as well. haha

well, any tips or is there something I am doing wrong?

 

My dash says 28.5mpg avg. I havent tested out a long drive though. but that 28.5 is over like 4500 miles. 6spd MT

 

Don't put all your eggs into the computers. It runs of a game of averages.

Reset Trip A after each fill up. I usually get about 160-180 miles to half tank running around town, ~250 miles straight highway cruising.

 

This. I finally figured out this is a setting you can set so Trip A resets on refuel. It's a big help.

The overall point is a good one, as well. The computer is an estimate, whether it be the fuel range, MPG, or whatever. Controls have reached the point where the trip computer and tire pressure readout is fairly accurate in practice, but I wouldn't rely on it for anything.

 

650 is what I saw on my trip to Yellowstone

I posted pics of it on my trip pics thread

 

I've seen similar ranges driving up to Seattle and down to LA in my 2012 wagon; riding I-5 at 75-80MPH I see 30-33MPG and my computer's range shows 550+. Of course I prefer to fuel up (mid-grade, 89 octane) at around the 1/4 tank mark, so I see about 400+ miles between fill-ups on those drives.

 

I used to drive SF to Seattle few times a month back in 2004
Great times


Yeah the huge range I saw was my los a ageless to Montana trip
It got great mileage pegged at 80-83 mph cruise

My Lexus has a bladder busting 22 gallons and I love the large tanks since I hate stopping every 350 miles, which most Japanese cars are

Love my wagon

 

Love the wagon too; which Lexus do you have? We're likely leaving the Bay Area this year and are considering swapping out her plug-in Prius for some sort of AWD crossover/SUV for snow, etc.

 

Ls600h
Ct200h

 

do you guys mean that I have to manually reset TRIP A for every fill up for at least the accuracy of the MPG?

 

There is a setting in the MIDI that will auto zero out Trip A with each fill up. I chose to do it manually so I can track overall mileage for long trips.


Trip B, I use for oil change interval.

 

[QUOTE=dwk331;15718232

I know it has to do with maintenance, usage, and it varies with how you drive... how i can make the range back to when I had 500 ranges with at least on the highway..[/QUOTE]


I am really surprised at how short sighted this is, I thought it looked at a long driving history. It seems like its looking at the last tank.


I typically get 425 miles per tank or so, and that's about what it shows after every fill up. My last tank had a nice leisurely cruise down to Monterey, so I got about 465 miles this tank.

Filled up last night, and the range was 465 miles.

This thread immediately jumped to mind.

 

It isn't looking back at the last tank but at the last XX miles of driving. BMW used the last 10 miles of driving to figure out MTE (miles to Empty) but I'm not sure what figure Acura uses.

 

Waaah???

How do i do that?? I always look that up and never found out how to do that... any help?

 

Read your manual

 

well, i did but the set up is all weird...

I wanted the system to reset on TRIP B on fill ups but doesn't seem to be working...

one more question,,,

If I do set it for TRIP B to reset every time i go on a fill up, will MPG also reset??? I'd like to see MPG change to know the differences...

 

I believe the auto zero setting only works on Trip A.


If I recall every time I manually reset Trip A the MPG estimator goes to 0.00 so I would assume it'd do the same if you set the computer to do the auto zero'ing.

 

Correct, only Trip A will auto-reset. AVG MPG will reset as well - but the MTE will remain calculated from the last XX miles.

If you do city driving and have a MTE plus miles driven of 250 miles when you fill up, it'll show you MTE of 250. If you immediately go on the highway and set cruise control, then you can watch it go up along with the avg MPG numbers

 

got it to work!!!

so how do i know the MPG lifetime of the car?? trip b?

 

It's trip B, provided you never reset trip B for the lifetime of the car. I'm not sure how useful that stat would be though. I use trip B to measure road trips... or the mpg of the car when I switch to winter tires.

I'm also a bit old school, so I do record the odometer at every fill up, just to satisfy my curiosity. That method reports *consistently* ~1 mpg less than the MID. I would have guessed the methods would average out to about the same over a long enough time period.

 

Me too. I am puzzled how the car can be off on that aspect.

 

A couple of things to consider?
1) Do you use the same gas station and pump every time you fill?
2) Do you top off?

If you top off, there is a 0% chance the number you calculate is sufficient. The gas displaced in your tank is assumed to be the same as the amount you put back in. If you top off, you can't verify the volume before you drove is the same as the volume after you filled.

 

I'm finding the same 1mpg less when I hand calc vs what the MID says. I use the same gas station for about 9 out of 10 fill ups and always stop filling up when the pump stops itself. I've been doing this for years and have logged every fill up.

 

Similar to @opboarding, I never top up and use the same gas station and same pump much of the time, and have been recording every fill up since the car was new (2012 TSX Wagon). Given the sheer number of measurements, it *should* average out, but it is consistently ~1 mpg lower than the MID.

Add the similar experiences of @opboarding and @RTM, and it's safe to conclude there's something significant to our findings.

 

haha funny thing is that me being dumb... just realized that standing still in a traffic will also calculate into the MPG...

sucks though..

 

haha funny thing is that me being dumb... just realized that standing still in a traffic will also calculate into the MPG...

sucks though..

 

Can reach 600mi range at this pace in ideal conditions!

The biggest factor is the road conditions. If you're driving in jams, anything over 20mpg is a success.

 

I only skimmed so sorry if I'm repeating what's been said.


I have found if I reset Trip A on a fill up, the next time I fill up when the pump kicks off if I take those gallons to divide the trip A miles my Trip A average MPG are really pretty accurate. Normally I give the gas few seconds to settle then turn it back on, let it kick off again then fill to next whole dollar. Just a personal thing.


Also, not to threadjack but when you set it to auto reset the Trip A at what point does it actually reset? I normally print my receipt then get in and write my Trip A Mileage and overall Mileage on the receipt (I track it all in excel later.) I'd like to use the auto reset as long as it doesn't reset until I turn the car all the way on.

 

Mine was feeling crazy optimistic. I never get close to 600 out of a tank.

 

I got 650 this morning too right after I filled up and got on a deserted highway. Tonight, 200 miles later I'm at 550 - so about 350 remaining.

Steady highway will give me between 450 and 525 on a tank.

 

If you are showing 550, that's ~miles to empty. So 550 left, 750 to the tank.


I'm not believing it, but wish it was true. Something fishy is up, mine has gone up the last few tanks, +20-30 at each fill up.

 

Upon re-reading my post I realized that I worded it poorly.


The display showed 350 to empty (actually 351) and I had travelled 204 miles since fill up, so about 550 miles on a tank.


Summer blend gas combined with cooler air will give you better gas mileage

 

I'm not entirely sure, but I thought the reset occurs after you fill up and close the gas cap door. I suppose you can check this by opening and closing the gas cap door, and just turning the key to the accessory position to check the average mpg of trip A. If the number is reset (shows dashes), you have your answer, although it will mess up your fill up average.

 

On my car reset works this way:

Gas door closed
Start car
Start driving

Then it resets as I pull out of gas station

 

Good to know! That would work with my recording method. Thanks!