LexBrett

I have a 2002 sc430, around 108k miles. My car is meticulously maintained. I have new plugs, a clean air filter and injectors, and I use premium synthetic oil. My trip computer indicates that I get about 13 mpg in dense city traffic. How could this be? Could I be missing an important maintenance item?

SlvBullet

iTrader: (8)

Wait for a couple of tank fulls and what it says.

FLYCT

In dense city traffic that may be the norm.

Look at my fuel tracking https://www.fuelly.com/driver/flyct/sc430

My best with 30% city driving is 23.9 MPG
My worst with 50% city driving is 17.6 MPG

My city driving is not normally in dense city traffic. When i occationally find myself In downtown, stop and go dense city traffic I see 13 MPG immediately after fill ups. Once I get out of dense traffic it gets better.

I'm pretty light footed unless I'm entering a highway entrance ramp where I love to floor it until reaching 75 MPH to burn out the carbon.

My highway driving is at 72 MPH in cruise for 200 miles without stopping.

JR

LexBrett

Hi JR. Very interesting! How did you track your fuel consumption?? I went to the Internet link you suggested, and was very impressed. Did you use a software or obd2 device??

FLYCT

I use my iPhone and enter each fillup. You can do it with any smart phone or home PC Internet connection.

Go to www.fuelly.com Register for free, after filling up you just enter odometer reading, gallons added, price per gallon and % city driving. The site calculates, tracks and graphs everything for you.

Entering takes a minute at the pump.

You can see my 4 cars here; https://www.fuelly.com/driver/flyct/
Click on any of the cars and see the details.

JR

grabber2

Because you installed the SRT intake

account2x

iTrader: (5)

I 2nd this. I still dont understand why people would install an intake that comes with a chip to offset the error in air intake it creates.

reelbb

Yes, this could be a contributing factor. The piggyback ECU sends preprogrammed fuel/ignition maps to the engine ECU and I believe Moe was conservative in regards to the maps. So I'm sure you're running a little rich, but I prefer that buffer instead of leaning out the engine especially at the higher rpms when our intake manifolds open up.

When I had it on my GS400, I got 19mpg around the city and that hotdoggin' it around corners . I have the injen on the SC and I'm getting about 21 mixed (70% in the city).

HMD

my mpg is 16.9 in city

fj40ih8mud

I judge my car in smiles per gallon. I average about 28.2

Of course it is snowing in Kansas City today, May 2nd. Latest snow in the year since 1907. No smiles today..

FLYCT

Yes, but you have Real Gasoline. Not the 10% alcohol mix we have in he US.

JR

grabber2

mine show 15.3MPG.......average speed 18mph.....I live in NYC

76210Guy

I'm averaging about 18.5-20 mpg here in the DFW area. I have a medium heavy foot but I don't use the car in PWR mode either....

texsexlex

iTrader: (3)

...my display is reading 21.9 tonight.....about 30-35% city...

bb430

iTrader: (1)

I drive short distances, I only live 3 miles from work. I get 18.8 to 19.5 as indicated.