Wassup guys..my question is I just fill up my tank on Sunday night and today my tank is half way and I only driven 70 miles..is this normal or I have bad gas mileage

 

Well how was your driving? Did you WOT a lot? At the halfway mark I usually get between 120-130 miles.

 

Nope I don't I drive slow mostly cuz my tl is drop

 

Hmm in that case, I'm not sure what would be the cause of this. Some things I can think of are not using 93 Premium fuel, vac leak, maybe needle is inaccurate. However I'll let someone more knowledgeable chime in, because I really am unsure.


What you can do is, go fill it back up to full, and see if it does it again.

 

how fast does it usually go down?
is the drop new? new sticky tires- wide tires..

going slow hurts mileage- the TL needs some rpm -- 2500-3000 to be in the powerband for upshifting

what else has changed- work done on the car?
tire pressures?

 

over 4500 rpm is vtec mode where it runs like,,and sucks gas like its a V-8 engine!

 

70 for half a tank, so 140 miles on a full tank of gas? if that's accurate then i'd say you're running very rich.

 

All I did to the car is..remove intake resonator,lower car with ff1 coilovers..and i did use my heat here and there but I still feel like I should get more than 70 miles on a half tank..

 

And also i change my rear driver side tire with a used tire

 

chances are its a false reading

many have come on here with the same complaint,,only to find the rest of the tank lasted closer to its normal ~300 miles to the low fuel light (3 gal remaining)

I would seafoam the gas for sure, ck a spark plug or 2, replace if over 60-70kmiles on them, use NGK Iridium

Seafoam the TB, ck engine air filter and tire pressures

back when I got the new suspension and tires,,a few tanks were used quickly ~in the testing~

that cool sound it makes with the res removed means you are in vtec,,stop that!

 

I change my spark plugs and air filter less than 10k miles ago and i seafoam my car yesturday..I'm just gonna wait til its empty and fill it up again and see..I keep you guys updated

 

are you running the correct NGK spark plugs? about 8 dollars each?

how did you seafoam?
manifold vac method with the after drive to blow out the crud = eats a lot of fuel

expect lowered mileage as the cleaning process continues thru a tank.

DO the gas tank method of 1 can to just under half tank

a year old engine air filter can be restricted
ck the cabin filter for proof of that!

 

do the spark plug make a big difference ?

 

Yes I used the correct plugs and I did seafoam thru the manifold vac..I always used Oem parts..

 

My , ive tested my car multiple times. My TL is a damn gas guzzler with CITY miles, but with HIGHWAY miles its great. Just going 14miles city miles, constantly on the gas and brake knocks off 2 notches of gas for me. I pump premium also, Yea it sucks but theres nothing i can really do about it with city miles. Just gotta deal with it

 

Wierd my TL do 22 to 25mpg on City, But then Again my Engine isnt quite Stock.

But it wasnt a Gas Guzzler even when Stock.. Did most of the time 19 to 22mpgs.. My Reserve (When Gas Light comes On) is Insane I do like 55miles with it.

 

Only mods i have

K&N Intake Filter
Intake Res Delete
Mid Muff Delete
TSUDO Axlebacks
K-Sports Coils

 

On my first half tank I get about 70 miles..on my second half tank i get about 130 miles,its pretty weird..I just pour a quarter bottle of seafoam into my tank yesturday

 

thats not enough seafoam --you want `2 ounces per gallon of fuel` for cleaning strength
= 1 can to just under half a tank of gas/ 8 gallons

and midyear run 1 oz per gal as maitenance dose = 1 can in just under full tank

manifold vac port 1/3- 1/2 can

 

My 1st half goes by super fast then the rest is slow... just like every honda/acura in my opinion

 

first half is ard 6-7 gal only