Poor mileage
 

I'm barely getting 270 miles before the light comes on in my 15 FRS. I was getting 310 in my 13 FRS. Can anyone share their mileage?

I am averaging ~220 Mi/tank.

Note the mods listed on my car. MY engine produces ~ 33% more power at peak than stock and I am getting ~22.7% lower mileage. So I guess my engine is more efficient? LOL

You missed out on an identical thread running the last 2 days,

Right now when it's super freaking hot, the AC is running flat out, it's on stickier tires, and I'm driving like an asshat, I get about 24 mpg combined.



That thread turned into a train wreck. Very entertaining.

I avg about 300-330 a tank normally and have gotten anywhere from 360-400 a tank when there are long highway trips involved.

Other than the car itself, have any other factors changed?

Location, gas station, driving habits, oil type, etc..

Both cars are/were stock. No changes in driving style or commute and still using 93 octane.

have you ruled out that someone is not siphoning your gas?

It's been like that since I purchased the car.

What was the verdict on that thread?

That the OP can't do math.

250 to 300 is about right on the FRS depending on the driving you do mines is 75% highway, 25% city on automatic. 300 or more is usually if your doing a lot of highway and little to no stop and go.


Sent from my iPhone using Tapatalk

tomei header, buddyclub catback, hks drop in filter, oft stage 2 tune 93oct...

AND...

i get 32mpg in the burbs, highway i get about 42ish depending on the speed and the geography of the land

AT or MT ... ??


humfrz

I've never gotten more than 24mpg since I've had the car.

I just deal with it. :iono:

MT of course!!

Hi ya, CarlIvan ........ :)

If you're measuring your gas mileage by the tankful and running till the light comes on and comparing vehicles........ you may be leading yourself down a pig path.

I suggest you calculate your gas mileage (miles driven divided by gallons consumed) and then come back ...... ;)


humfrz

....and you can get 42ish mpg on the highway ...??

DANG! ....... that is good for the car with a MT ..... :D


humfrz

next time ill take a pic and post it for ya! its pretty chillin getting bangin gas mileage.... usually happens in the fall/winter/spring bc the air is sooo cold, this summer i went up to like 38/39 highway

What do you credit your exceptionally good gas mileage to .. ??

Header? Tune? Good driving habits?

The highest I've gotten on non-freeway, highway driving was 34 MPG.

(stock, MT, fully loaded, A/C ON, driving the speed limit)


humfrz

i dont know u get 300, if i can get 260..i am happy

270 is poor?! I'm getting 180-200 until the gas light comes on.....:eyebulge:

I think I need to see if something is wrong....I have headers, overpipe, frontpipe, catback, and tune. I feel like I have a v8, getting under 20mpg...

Maybe your gas light is reading funny ...... ;)

Maybe because you drive around in first and second gear ..... right up against the rev limiter ...... :D


humfrz

I used to drive and shift until 3-4K rpm, then I started following the shift light and shifting below 3k RPM. following the shift light only gives me about 10-20 more mpgs per tank...I think I should start looking into this more

Anyone think this is normal? I don't even have the AC on, I do only drive in the city, but there's been times where I've driven across state lines and didn't get any noticeable differences in mpg. I don't care about not having good mpg's, just want to make sure it's normal getting only 180 before the gas light comes on...my wrx that was stage 2 with an instant spooling turbo would get the exact same, 180..but the tank size was different.

My MPGs dropped but only because my first FRS was an auto and my current one is a manual :p I averaged normally around 30+ on my auto and right now I'm averaging about 25 MPG with a stock FRS...guess I like to revv it out more on a stick lol (ofc besides the shorter gearing with the manual tranny)

HEY! ....... some of you gang members ........ :D

A couple of good ways to fool yourself in measuring gas mileage is to measure from when the low fuel light comes on OR to believe in the mileage indicator in your car.

So, I suggest that you drag out your paper and pencil, fill up the tank till the pump clicks off ....... drive the car some distance ...... come back to the same pump (if possible - not necessary) and fill up till the pump clicks off.

Now you have two numbers ....... miles driven and fuel consumed.

Here is where the paper and pencil come in ......... :D

So, talk to us about l/100 kilometers or miles per gallon.

(I'm just typing in for @Tcoat, while he is on holiday and @Ultramaroon while he is at work)........ :happyanim:


humfrz

No, he has one number because you didn't tell him to record his starting odometer value.

Same oil used? Trans fluid? Air filter?
Tires???
Location the same??
Same weight??

I know both stock, but what different options?

daaaaaaa ............you're right............:bonk:


humfrz

Oh, I'm just funnin'. The contextual clues were all there. :thumbsup:

Well, maybe so, but, since we have had some folks that have been having trouble with math here lately, I feel badly about leaving a step out ..... ;)


humfrz

Knew you would have my back!

I am not sure what has started this Miles Per Light fad but it is a horribly inaccurate way to measure milage. If the light comes on at 270 miles on one car and 310 on another it just means the Spenser float I'd a bit different not that the milage is worse. The difference of 40 miles equals something around a gallon and a half of fuel. That gallon and a half spread across the tank is probably under an inch or so. No idea how strict the float spec is but doubt the variation is unreasonable.

Th milage indicator may be off a couple of MPG but it is close enough if used to just measure against it's self and massively more accurate than MPL.

I consistently get between 8 and 8.5 l/100km. That's with a lot of fun driving mixed in.

Nothing crazy on the mod front... UEL, springs, 17x9 with 245/40/17 200TW tires and a 91 tune.

Y'all are doing it wrong.

LMaO! I don't even get to 20 miles per gallon. Look at my signature. :iono:
I live in the city so lots of stop n go.

This! Me either. I get happy when I get to 24.5 mpg. On shell fuel.


Sent from my 5054N using Tapatalk

well stock on a cruise i wouldnt get more than 27 in the burbs, i put the catback on and got 29. then i put the header on and i started getting 32/33 in the burbs... the tune is just off the shleft oft stage 2 93 oct.. i can tell you, if i wanted to, i could go through a whole tank in one day of hard driving... other than that i fill up once a week bc i do a lot of driving. i never use my AC unless its like 95 or hotter. but i would probably credit the good driving habits. even though ive been pulled over 5 times and 4 of the 5 were for speeding, haha

if you want better mpg, try changing up your fuel... i strictly use sunoco 93 from the same 4 gas stations. BP is a very good gas company... try their gas prior to going on a trip

For what it's worth (and as I noted in the "other thread" on this), I have observed the A/C on/off seems to have zero impact on driving the car in terms of gas mileage. Here is my monthly average from 2012 until now. AC usually used May through September, rarely October through April.

Over 80% of this is commuting miles (same path, same fueling stations) so it's a relatively valid comparison. Months with high peaks are months I'm most likely to take road trips in the car.

I'm averaging about 31mpg which is about 310-330 miles a tank when light comes on. I'm driving a 2016 frs with AT but I do have a tendency to enjoy the sport mode and paddle shifters from time to time. I drive town and highway both almost everyday so being combined I'd say I'm doing well.


Sent from my iPhone using Tapatalk

Assuming everything is working correctly, the light comes on when you have 2.4 gallons of usable fuel left, and the tank holds 12.5 gallons of usable fuel. If you're filling up right when the light comes on, it means you're using 10.1 gallons per 270 miles. That comes out to 26.7 MPG, which is not bad.

But you still can't rely on miles per tank. Do the math. If the math is too hard, put a mileage app on your phone and let the phone do the math for you.

Take a pic of what?

take a pic of the mpg calculator on the car when im cruising on highway trips and show that im roughly getting in mpgs

LOL. That thing is ridiculously inaccurate and almost always shows much better mileage than the car is actually getting. Snapping a picture of that doesn't tell us anything, other than perhaps you don't know how to calculate mileage yourself.