i cant get more than 19mpg on tl type-s 2007... any mods out there that can help

 

What's your Mileage?

And what is the MID reported Average Speed?

 

There's a break in time until your car normalizes and your mileage is increased.

Also City driving or highway. If mixed, percentages? And seems like you got a Type S, That may decrease it a bit.

But I manage to get 32 on the highway, and City averages around 24-26

 

im noticing the same. i have 724 miles on the car and have averaged 17-19mpg for the first few fill ups. i hoped that this would increase after the break in period (which i read was 600 miles).


maybe i have to wait for the first oil change?

 

don't feel bad i get 11 MPG on a 3.2 TL

 

^ I've been getting 12mpg... because in the winter there is a different mix of gas, and also because I warm my car up for atleast 5mins before driving

also, I did find a jump in mpg average after the first oil change by 2mpg.... which I lost as soon as winter came

 

We get 17 or 18 MPG at 12,500 miles. BUT we average 19 or 20 MPH and some of that is with a heavy foot and high rpm. I am not surprised nor disappointed.

It all depends on how you drive.

Do tons of highway miles and watch your avg MPG (and avg speed) shoot up.

 

so are there any mods to increase the gas mileage like the OP asks?

 

the only mod available is drive with your hip not your toes

 

^^

And maybe CAI. Many report incremental gains in gas mileage with CAI. But don't expect too much.

 

I'm getting low-ish.. but mines is in liters and not gallons.

 

I hope that 19 mpg isn't highway driving? I can see maybe getting 19mpg in the CITY, but you should be able to get 25+ mpg on the HIGHWAY (65-75 MPH).
Heck, my 08 Type S with 1200 miles on it gets 29-30mpg on the HIGHWAY (65-75MPH) according to MID.
Maybe a trip to the dealer is needed??

 

@frankiedix22 - Is your 19 mpg what the trip computer told you, or what you calculated based on miles driven/gallon added? I have found my onboard computer to be wrong (too high by 4-5 MPG) on every tank so far.

 

According to the EPA, 20 is the official combined average for you car by the way.

I've been keeping a spreadsheet of mileage for my '08 TL (not an S-type), here are just the MPG column:
I'm hoping they'll increase by 10-20 % once it gets warmer here and once they stop using winter gas formulations. The higher ones are highway trips and the lower ones are more mixed driving (about 20/80 city/hwy). It's too bad I can't paste the whole thing, but the formatting gets messed up. I keep track of date, miles driven, gallons, cost/gal, which gas station, outside temp (range like 15-30 °F), CTY/HWY rough %age, and rough average speed on the HWY I've been driving. It sounds more time consuming that it really is actually.

Anyway, what % city would you guess you'd do per tank? Other factors can affect your mileage beyond what others have said about breakin. Winter gas formulations will negatively affect your gas mileage as will low ambient temperatures. Also find out if your gas station is using an E10 blend or pure gasoline (E10 contains 10 % Ethanol). Ethanol will give you inferior mileage. Also, what's your driving style (hard acceleration or easy acceleration)? How many red lights did you hit? Both of these factors have a huge effect on mileage.

I didn't calculate my mileage on my 2008 until after the first 900 miles since I was driving it pretty aggressively on stop-and-go city streets (no highway) during the break-in period. After that, I'm finding that my highway mileage is about 27 when it's over 30 °F. It dropped to 24 for the same highway trip (~250 miles) when the temp was under 10 °F. Again, this is using winter fuel E10 blends (I can't find any stations around here that sell pure fuel anymore).

 

Here in NYC using this nasty winter gas I've been getting around 23 MPG with mixed driving. You've got to be careful calculating your mileage based on miles driven per tank because there is about 2 gallons left in the tank when your gauge reads empty - which you'll notice that you never put in 17 or even 16 gallons of gas even if your below "E". Most I've ever put in was 14+ gallons, but usually 13+. Out of a "full" tank of gas, with 75/25 split between highway/city, I usually get about 340-350 miles. The worst I've gotten from a full tank is 280 miles. BTW - I've got 28K on my 06 3.2 TL. When summer gas comes in (at stinkin' $4/gallon! if predictions are right), I'll do a little better.

 

I don't understand your words of caution...??

Fill up the tank, reset the odometer and drive the car. Now, when the tank is low or empty, whatever, you simply take the miles driven since your last fill-up (from the odometer) and divide by the number of gallons you put into the tank (irrespective of total tank capacity).

 

Man, do you guys drive slow? I get 234miles with a full tank. In the city, I usually get an avg of 14mpg, combine total with highway is 19mpg. Every week its more like 160 miles on freeway, and like 50 or less in city. I have a 07 TL-S with about 14k miles.

 

I have about 3k miles on my 08. I get 18-19 atound town, but recently got 28 on a roadie from sacramento to santa barbara. I was pretty happy with that.

 

23-24 for a 07 type-s ... 6k so far ... first oil change coming up so expect my MPG will go up a bit ...

 

i just finished installing my CAI this past week and before I was averaging between 270-300 miles per tank (that includes going WOT) and I filled her up today at 335 miles (also going WOT several times)...I know CAI is supposed to help w/ better mileage but I wasn't expecting this awesome amount

 

when i take long trips from northeast to southeast (I95) I get 32mpg in cruise control at 80mph i have the thermo spacers n cai and I dont really abuse the car to begin with. i dont know if u can factor that in. and I have 80094 miles on it.

 

22-24 MPG '07 TL-S, no performace mods.

 

ive got 6200+ miles on the car and i mainly drive on the fwy... my avg spd on the fwy is about80-90mph... and my avg spd on the trip cpu is about 28mph...

but i pretty much get like 18-19mpg and it sucks, i feel like everytime i start the car my gas tank goes down...

this is my second 3g tl, my first was an 07 tl 6mt w/ nav. and that got around 24mpg...

my new tl is an automatic and is type-s so maybe thats why i get less idk...

 

@frankiedix22 - your problem is that you're driving 80-90 mph in my opinion. I'll bet you $20 your mileage will improve is you set your cruise to 70 MPH on the freeway. Just for the fuck of it, fill up the tank and try it for a week (at least 300 miles) and report back.

 

A lot of people use the tank capacity from the manual to calculate their gas mileage, i.e. I got 280 miles from my last fill up to empty as per gauge (280 / 17.1 = 16.4 --> WTF!!). The way you specify is the correct way to do it (280 / 14 (gallons that were put in) = 20 --> much better).

 

This is kind of weird ... my trip cpu has 36 mph and my driving is mostly hiwy as well ... so it seems you stuck on local quite a bit & thus drag your mpg number down ...

Don't you guys all hate it after you fill it up and drive the car for like 20 miles, then the needle will get away from the Full position? My 00 TL can drive for like 50 some miles and it's still showing Full ...

 

my TLS does the same...when its full, I get 40-50 miles b4 the needle starts dropping from full

 

I have had my 2007 TL Type S for one year and have 15,000 miles. I drive about 50% highway, usually at 75-85 MPH, and about 50% city. I consistantly get 21-22 MPG. This is the same milage I formerly got on my 2001 CL Type S for the same type of driving.

 

I normally get my gas at Costco 'cuz it's close to where I live & work ... but today I was running some errands and had to get gas at a Shell ... got the 91 & to my surprise, the MPG has gone up to 25 so far .... I'm thinking about switching to Shell to try it out for a while ...

Any other drivers out there notice these kind of improvement in terms of MPG reading?

 

i always get 91 at Chevron...i heard costco gas was not so good

 

I just took a highway trip in my '07 Base TL (AT) with the following results:
Interstate at 75-80mhp = 29mpg
Combination Interstate and U.S. Highway mountain roads 26.5mpg
My average city mpg is 18-19mpg

All of this is calculated based on miles driven/gallons to Full. The trip computer on the highway mpg was about 2mpg higher. (31mpg vs 29mpg actual)

 

I average 26 on the highway (80-90mph) and if I'm on a road that I have to go 60 I can easily pull down 32mpg. In general with my mix of driving I probably average 24-25 mph per tank. I can't believe some of you are average less than 20 with the majority on highways....something must be wrong.

 

thats funny because my type s at 40-50 miles is about 1/8 down from full already...i get about 330-350 miles between fill ups....

 

those numbers are for the times i don't gun it a lot...w/ those numbers i average about 365-380 mpg b/c i do about 40% highway driving and the times i'm on the highway are at times when i can cruise at about 70-75 mph while averaging 29-32 mpg...the other 60% city is also at times that i can drive around 35-50 w/o running into traffic...i think my schedule worked well this time around w/ school so that could be it....otherwise, on my normal driving, i get about what you said 320-340 ish b/c i like to drive fast....just wanted to show what the TLS can get if driven casually.

 

Yeah, on my usual home-to-work commute (80% highway where I set the cruise for 70 and 65), I get around 26-27 on shell gas vs. 23-24 on other brands. I also did the comparison on a 250 mile road trip (75-80 mph, all highway) and found the shell gas gave me 27-28 vs. 24-25 on the supermarket stuff. I only get the shell stuff now.

 

What kind of tires are you using?

 

I have 18k + miles on my '06 TL and I average 19-20MPG in the city. I thought it was me at first, but that is what the vehicle advertises.

 

All I have to say is I drive my 1994 Chevy Coprice 9C1 (retired police car) back and forth to work. It has 168K on the clock, its a 5.7 liter (350cu) engine, cop motor, cop shocks, etc etc. AND it gets better milage than my damn 07 TL.
The TL gets about 21-23 mpg

Coprice gets 25-28 mpg. Why does a older, heavy car with a bigger motor, heavy weight, HIGH milage, get better mpg than a brand spanking new (well its got 7k on it) 07 TL with a smaller motor and less weight?

Makes no sense, and with gas hitting 4 bux a gallon you can bet the TL will stay at the nest, except maybe on Sundays.

WTF!

 

You sure your odometer in your Chevy is accurately recording your mileage? For example, if it's off by 10 % so is your mileage calculation: 25-28 --> 22-25 etc.

I just looked up a 1994 Caprice w/ the 5.7 L on fueleconomy.gov... they advertise 18/26 (19 combined) but using the new estimates that drops to 16/24 )21 combined). You must be driving the hell out of your '07 TL and babying your old Caprice or something!

 

Thanks for posting the website, thats neat info. The link actually shows it as 15/23 18 combined. I dont know what specs they are getting the info from, the police caprice came with 3 different options. Mine, the 9C1, has a axle ratio of 3.08, http://www.9c1.com/brochures/1994/94_9c1.pdf page 4 of 8. It also rates my mpg as 17/25, but the EPA changed those figures.

Heres a side by side comparison, http://www.fueleconomy.gov/feg/2008c...umn=2&id=23553. It does not show how many miles my Capice gets on a full tank, but I can tell you I get over 400 on a full tank of gas, in the summer with A/C use and stuff it drops to the mid 300's. That's not babying it, thats driving the speed limit. A hard thing to do in it. If I drive 80mph to work/home I see about 320 a tank. But none the less, according to the website, the car gets only 2 miles less combined than the TL.

Maybe the 7K I put on the TL has not 'broken' it in yet. Most of my commute is highway, I would say about 89% of it. Now the Caprice is horrible for rush hour, stop and go stuff. The TL is a little better, but not what I expected. Then again, it does have a V6, not a 4-banger.