Just wondered what kind of MPG you guys are getting, I have noticed a big drop off in the winter months.
I am showing average @17/ 18 mpg mixed driving.

 

I have been getting 29 to 30 on the freeway and 20 in town. We don't really have winter on the Central Coast in California. The coldest days we had this winter were in the fifties.

 

I get about 29 mpg pure highway. Not sure what I get pure city, but I average about 20-21 mpg with half highway driving and half city (stop and go) driving, calculated by distance. This is in the spring. In the winter, knock about 3 mpg off.

 

Winter = "oxygenated" fuel

IOW, the EPA mandates more air be added to gasoline, resulting in less gasoline.

This is to prevent excessive pollutants from the four carburetted cars with 100% stuck chokes from fouling the air.

It's supposed to be only about a 10% drop, but my wife had an '83 Continental back in the early-90's which took a solid 30-35% hit.

Watch...around the middle of the month, it should come back to 'normal'.

Could also be, seeing you're in Oregon, the pump jockeys are putting a half gallon into their own container when pumping yours...

8-P

I know Cali has different fuel mixture requirements than the rest of the country, but WA/OR still tend to have them, 'cause it's easier/less expensive. At least it was that way back in 2000-2004.

By "less expensive", I mean it's less expensive to have gasoline already headed that way to to them, rather than send separate shipments. When you live next door to the biggest guy on the block, you'd better like his music.

 

25-26 mpg combined. If I do a long trip I can squeek out 32 if I keep it at 72-73 mph.
I don't go over 75 anyway since I LOVE to spend time behind the wheel of this car.
My fuel economy is also better in the summer on all my cars.

chad
2006 xj8

 

I've been getting a combined 19mpg. Lot's of city driving though back and forth to work (8mile one way on 40-45mph roads).

I have noticed that the car computer is very optimistic - usually about 2mpg high...

Here's my current mileage figures:
2007 Jaguar XJ8 Gas Mileage (Jag) - EcoModder.com

/Mike

 

Just looked at the computer today while driving. It was reset after a long trip and current reading is average around town. 24.2 MPG

 

I average 18-19 for my weekly commute mixed hwy and city.. and average 24-27 on pure hwy use running 70-75..

 

My last brim-to-brim test showed 24.9 per UK gallon. Not too much town use. This matched the computer calculation. I am a suspicious sort of chap with these pesky electronics, so check from first principles every so often.

 

On freeways, I get 25mpg going an average of 70mph

In town, I get 20mpg going very slowly .................

 

Same here. 18 and 22 in the winter, 21 and 26 in the summer....Still respectable for a supercharged V-8.

 

On the car computer, I use the 'A' group to collect information on the last full tank of gas. On the 'B' group, I collect historical, ongoing info.

On the current tank of gas (A), I am showing:
39.6 miles driven
24.0 miles per gallon
30 miles per hour

On the historical (B) info, I am showing:
7611.6 miles driven
25.6 miles per gallon
36 miles per hour

The driving is rural in nature, so there is little stop and go in the averages.

I did check and add air in the tires recently as they were a bit low, possibly due to winter temps???

Thanks-
mag

 

I have to say I get no where near anybody elses mpg, and I would not say I have a heavy foot.

I have a Super V8, LA area of California

Typical mpg is 15.5, and that's all town driving with a little bit of freeway
My wife gets around 20.1 mpg when she uses it on her 180 mile round trip freeway commute...but knowing her going at least 85mph! NB. this commute is towards the desert as opposed to LA, hence not the usual parking lot commute you would expect in LA!
I averaged 21.7 on a recent 250 mile mainly freeway trip. Funnily enough, the first 70 miles I put on cruise at round 75mph, and got around 20.5mpg, and for the rest of the journey drove without cruise, but still in moving traffic and possible in excess of 75mph, but got better mpg than when in cruise control.

All mpg calculations I have got from the computer, which seems pretty accurate when I cross check it.

Jag specs are 15mpg town / 22mpg highway, so I guess thats pretty much where I am!

PS. I have to say the extra 100HP is worth the hit!

 

That's all you have to say.

Brakes = setting fuel money on fire

I'd wager your average speed on a tank of fuel is well-under 30 MPH.

Unless you can steady-speed cruise for a while, there's no fighting physics. This car is light, but it still has mass and resistance.

Now, if you can stay at 28 MPH, or something like that, for extended periods, MPG will shoot up. The most MPG is achieved when the vehicle is in top gear, and will stay there with a very light throttle. This tends to be low-to-mid 30's MPH.

 

Haha, I'm in the DC area and my speed averages about 29 mph. I get about 20-22 mpg.