dman81

I want to get some feedback on your car's gas mileage. Right now I am barely getting 270 miles on a tank of gas. I was hoping of getting 300 miles on one tank. Now I know it all depends on how you drive, well let me clarify that part, I drive like a grandpa and don't go over 80mph on the freeway. I replaced air filter, plugs, poured fuel injection cleaner, and use regular gasoline. What are some of you guys averaging on one tank of gas? Is 270 miles okay or should I be getting more miles?

gasha1

What model car do you have? Auto/manual?

Frank Allen

my 92 lx driving 70 mph with a/c on gets 400 miles + a tank 30 + mpg, thats all i know
Frank Allen

accord_raffi

You should DEFINITELY be getting better mpgs. My turbo accord was getting better gas mileage than that. I think you are in need of a regular tune up. The air filter and spark plugs are a good start.

How many miles are on this car? Do you have a check engine light? Have you ever changed your primary oxygen sensor? If not, that could be a big reason for getting your crappy mpgs.

Try hooking up an OBD scanner to see if there are hidden codes. If there are, sort them out. Then replace your spark plug wires, distributor cap, and distributor rotor.

ricebike

hmm, 95 is the wacky year where you either have obd I or obd II...

i had the earlier & used the paperclip on the blue test port to read the flashing trouble codes on a 95 accord Lx...

dman81

I can't believe how well Frank's car does on it's mpgs! The car is an automatic, has 114,353 miles on it. I have not changed the primary oxygen sensor. I do not have a check engine light, how can I check for hidden codes without taking it to a shop?

GhostAccord

94-97 Accords can all use the SCS paperclip method (Service check connector, self diagnostics). I have a 96 OBD2 Accord and I used to do it all the time.

Link on how I scaned my OBD2, the OBD1 5th gen Accord is the same IIRC.

https://honda-tech.com/forums/showth...s#post41093240

GhostAccord

dman81 - you may want to change the last line in your signature to say VTEC, instead of V-Tech. Just putt'n that out there for ya!

gasha1

My 99 EX coupe gets 400 in and around miles--close to 500 on the hwy cruising at 70 MPH.

accord_raffi

My mother's 98 accord gets about the same. I remember seeing 390 once.

jordanitr

95 ex and I get 410 miles when its in the E mark, I was getting around 370 but I just did basic tune up and a new oxygen sensor and now I'm at the 410 to tank

19Accord97

I've got the same problem.

97 lx auto 4 cyl and I drive like a grandpa too. I am LUCKY to get 25 mpg whether it be in town or going 70 on the interstate. Its been doing this for a long time. Even after I had the free tune up by Honda completed, nothing changed.

I am @ 118k miles with original o2 sensors. So I assume it is the manifold sensor. I just want the thing to trip the CEL so I can get a free one from Honda. (EPA lawsuit)

TheMuffinMan

iTrader: (1)

DONT DONT DONT use "I get XXX per tank"

Fill the car all the way up to the click (don't top off)

Reset your trip odometer

Drive around til at least half tank

Fill it up all the way up to the top, divide the miles recorded by the amount of gas you put in.

Do that for a few fill ups and see what you get as an average. Those gauges aren't exactly what I'd call "accurate"

19Accord97

I do that at every fill up. My last fill up I got 20.2 mpg. The previous receipts are roughly 22mpg.

accord99power

I just wanted to add this to your instructions because they are correct, however *make sure you fill back up to the first click again not past*

dman81

Guys, before I spend a dime, what should I do first, buy the scanner to check for hidden codes or go straight into replacing the oxygen sensor?

19Accord97

You don't need to buy a scanner. A place like AutoZone should be able to read the codes for you for free. The access port is behind the cigarette ash tray.

TheMuffinMan

iTrader: (1)

Find what you're actually getting for gas mileage first before spending any money.

My S2000 can be quirky with it's gauge as can the Accord. My S literally said it was 1 bar left (digital gauge) and I went to fill up and only had 8 gallons missing.

*edit*

Also, some locations switch to a "winter mix" of gas that decreases MPG and the other thing to keep in mind is colder air leads to more power but less efficiency (think cold air intake all the time)

dman81

Perfect, I'm going to head down to Autozone.

ejvtec

ive been averaging 18.2mpg in my 95 ex 5speed, and the 96 lx wagon (auto) i had before that was averaging about the same...i just replaced the thermostat though, which i found out was stuck open...so not only do i now have heat, but hopefully ill get better gas mileage now...

conker

92 - LX - manual - 365,000 mile - 33+

CRZ1

97 LX 27MPG

accord99power

hey man this may be very helpful for my problem. Would you say a 3 mpg difference be usual? I have turbo charged accord though. i swear since the cold weather i was getting bad mpg, sure enough checked the over day was getting 20 confirmed now 17 confirmed. Same lead foot as usually. haha.

accord_raffi

Idk if FL will use a winter gas mix. You guys don't get as cold as we do in New England haha. For you, maybe it's that your car's IAT sensor and MAP sensor are noticing an even colder/denser amount of pressurized air coming in and your ecu is adding a little more gas than usual to keep things matching with your tune. I'm assuming you were tuned on a warm day in FL so the air wasn't as cold.

OR, maybe it's just typical stuff like your air filter, ignition related items, primary o2 sensor.

TheMuffinMan

iTrader: (1)

Ehhh, like raffi said, Florida probably won't be a state to switch to a winter mix if it's state specific (though I'm not sure if it is or not) but from what I've seen/read whatever the winter mix is will knock your MPG down a bit.