What gas milage do you guys get for 03 4.6is?

[Fraser]

Originally Posted by GOFAST GUY

averaging between 150-160kms/hr, I was consistently 16mpg.

Are you talking US gallons, or imperial gallons?

[GOFAST GUY]

Originally Posted by Fraser

Are you talking US gallons, or imperial gallons?

I'd imagine US gallons. In my calculations I used 4.5L/gallon but I'm not 100% sure what my vehicle system computer calculates on. The numbers I came up with and what the vehicle reads are very close though.

City driving I'm consistently running at about 14mpg with winter tires on. I can't wait to put my summers back on or find lighter wheels.

[JCL]

Originally Posted by GOFAST GUY

I'd imagine US gallons. In my calculations I used 4.5L/gallon but I'm not 100% sure what my vehicle system computer calculates on. The numbers I came up with and what the vehicle reads are very close though.

4.54 litres/gallon is an Imperial gallon.

Multiply by 5/6 to get a US gallon. 3.8 litres.

[GOFAST GUY]

Originally Posted by JCL

4.54 litres/gallon is an Imperial gallon.

Multiply by 5/6 to get a US gallon. 3.8 litres.

Interesting. I'll have to look back at some of my past mileage notes and re-calculate to see the difference.

[bullethead]

Just thought I'd chuck my stats in. Lead right foot normally 12mpg(imperial)
At the mo not going over 2k rpm 18mpg
But it aint alf difficult cos everytime I see a car comin up behind me I wanna floor it and rag its tits off.

[jbny]

I got a 4.8 and around town i get 16.5 - 16.8 mpg(not in nyc anymore would've been FAR worse) The max i've gotten on the highway is 18.9-19.0 mpg that too not going over 3k rpm.

[GOFAST GUY]

Spring is coming and I'm looking into performance upgrades but with that I'm looking for imput on how it will affect my fuel economy also by going with upgrades up to stage 3 Dinan. I'm open to suggestions

[J.Belknap]

Anyone else find noticeable differences in driving between full and reserve tank levels?

[Fraser]

Originally Posted by GOFAST GUY

Interesting. I'll have to look back at some of my past mileage notes and re-calculate to see the difference.

Once you re-calculate your mileage figures they won't be as good as previously posted and more in line with the US posters.

And just a note on the tyre/wheel issue. A heavier wheel/tyre or, more correctly, a wheel/tyre combo with more rotational inertia will primarily effect your stop/start fuel economy, not so much your highway fuel economy. That's more effected by the width of the tyre due to aero drag. The tread design and tyre compound will effect your rolling resistance and plays a part at all speeds.

[E55AMG2]

Originally Posted by GOFAST GUY

I'd imagine US gallons. In my calculations I used 4.5L/gallon but I'm not 100% sure what my vehicle system computer calculates on. The numbers I came up with and what the vehicle reads are very close though.

City driving I'm consistently running at about 14mpg with winter tires on. I can't wait to put my summers back on or find lighter wheels.

If the car is calibrated for Km/H, then it's using Imperial Gallons. US Gal = 3.785L