fuzzysig

Im getting 12-13mpg in town and 28.7 mpg on freeway

Ita a massive difference
Is that nprmal for v6pr whats goin on? im used to own 4bangers

teh CL

iTrader: (1)

Your lugging around a 4,000lb tank.. MPG RL

fuzzysig

whatsthe resl world mpg on this tank then?

fuzzysig

i was just wondering why such big gapin city/hwy mpg.
Seems unusual

twiz03

I have an 06 RL with 95k miles, I average 17-19 city and 26 highway.. I inflate my tires to 38psi, just changed out all my fluids and spark plugs that helped the mileage a bit. I use to have a TL, That got 5mpg better than the RL but the RL is a tank! I love driving it, It's definitely worth the MPG difference in my opinion. Gas is cheap, I guess I won't be saying that when it goes back up to $5 a gallon in CA hahah

fuzzysig

Yar 19-20mpg wouldnt be so bad

ronvanr

I'm getting close to the same with my 08,

projektvertx

iTrader: (2)

That's perfectly normal....

TheAcAvenger

I used to average 16-17 city even at 200k miles. 12-13 is pretty bad

TonyCD

I get about 14 city, 27 highway, and I think that's pretty typical.

You're pushing over 4,000 pounds with 290 horsepower and full-time four-wheel drive, using 2004 technology. In highway cruising, the car's good aerodynamics and a low cruising enging RPM keep the miles per gallon reasonable. In stop-and-go, you pay the price for the car's exceptional combination of luxury and understeer-free all-weather performance. It's all part of the deal.

fuzzysig

Actually when i reset the trip meter the mpg went up to 15-20mpg depending on how i drive
I havent reset that trip meter since i got the car

TonyCD

"Depending on how I drive" is the key part. Repeatedly push the center button and you'll find there are two trip odometers. If you want to see a long-term average, leave one of them alone. Reset the other one at the start of a highway trip, and at the end you'll see what kind of highway mileage you're getting. Ditto for in-town. You'll find the spread is pretty wide.

schen72

I get about 18-19 MPG average on my 06 RL. I drive about half city, half highway. The RL is quite a heavy car. I have trip A on auto-reset and trip B is never reset.

Türk

In Turkey we say "touch to accelerator pedal like there is an egg under it"

MtMan1020

While that is an excellent plan to improve fuel economy, it makes for a very boring drive........ I got the car for fun and comfort, not economy....

fuzzysig

ok so I tried driving different ways and still get crap gas mileage

what can cause this gas mileage?

are there common problems with this motor?

so far I have done:
new battery
balanced and rotated wheels with properly inflated tires
did the 3x3 transmission flush with redline
oil change
adjusted valves
ran tests with autel maxidas shop scanner no codes

theres gotta be an explanation for such a major difference between city and hwy mileage

rlerman

Presume you are using premium fuel?

i average 22 in suburban driving and typically average 26-28, maybe even higher, on the highway. I use a k&n air filter too, but not sure that helps. Have you cleaned your air filter?

maybe run a bottle or two of techron thought the car. I typically put a bottle in every year.

projektvertx

iTrader: (2)

I'm honestly happy if I average 20 mpg combined with about 50% city/highway. I remember filling up and sitting in stop and go traffic for 2 hours where I hit 3rd gear maybe once, and my MID said I averaged 13.2 mpg when I got to my destination. Bad city numbers real don't phase me anymore... Full time AWD with a 5000 lbs car will do that to you.

fuzzysig

a 3.5L mercedes 4matic e class gets better mpg than this

my 1998 t100 3.4L truck with 278000 miles gets over 20mpg
this is not normal.

projektvertx

iTrader: (2)

The 4matic system is RWD until it slips... That's the problem with these full time AWD cars, they will drain your wallet in the city.

I'll accept that something may be off with your car however... When was the timing belt done on the car? Spark plugs? What kind of tires are you running? I noticed a drop in mpg when I switched to Michelin Pilot Super Sports...

TonyCD

These area all smart service moves. Congratulations on making them.

But there are no miracle cures for the low city MPG of this car. Re-read my 10/23/16 post.

oo7spy

What MPG are you actually getting, and how do you drive? 14 MPG in the city is not uncommon for the RL as Tony and others said. You have an extra 15-20% drivetrain loss compared to FWD or RWD, and the car weighs over 2 tons without you or gas in it. If you are going over 3k RPM in the RL in city driving, your MPG is toast. It's just part of the ownership.