[elistan]

Today's fill-up:

503.6 miles
15.191 gallons
33.15 mpg

iDrive reported 33.7 mpg

328i, mostly highway, mostly Comfort mode.

My S2000 gets 27.5mpg for the same sort of drive.

[trpt]

I traded my '01 S2000 in on my 328i and was surprised to see the gas mileage improvement of the BMW over the Honda. My numbers are generally similar to yours, although iDrive typically overstates my actual mileage by 1.5 to 2.0 mpg.

Originally Posted by elistan

Today's fill-up:

503.6 miles
15.191 gallons
33.15 mpg

iDrive reported 33.7 mpg

328i, mostly highway, mostly Comfort mode.

My S2000 gets 27.5mpg for the same sort of drive.

[utnuc]

328 6MT. I've driven 1300 miles or so, all city - 95% Comfort. Getting 24-25 mpg on nearly every tank.

[fshubert]

335i 6MT with 4800 miles and 70/30 highway/city mix at 90% Sport+. Getting about 22mpg.

[gerbs]

getting about 16 mpg with 90% city 10% highway.

I drive quite conservatively too (don't even have a chance to gun it much, and when I do it's more for necessity...) I have yet to put the pedal to the floor.

Mostly in comfort mode.. can't remember the last time I've been in sport. Unimpressed to say the least haha but not really surprised. 91 octane.

http://www.fuelly.com/driver/gerbs/335i

[claykin]

Originally Posted by gerbs

getting about 16 mpg with 90% city 10% highway.

I drive quite conservatively too (don't even have a chance to gun it much, and when I do it's more for necessity...) I have yet to put the pedal to the floor.

Mostly in comfort mode.. can't remember the last time I've been in sport. Unimpressed to say the least haha but not really surprised. 91 octane.

http://www.fuelly.com/driver/gerbs/335i

You poor CA drivers and your 91 octane Premium.

[tdizzle]

Originally Posted by gerbs

getting about 16 mpg with 90% city 10% highway.

I drive quite conservatively too (don't even have a chance to gun it much, and when I do it's more for necessity...) I have yet to put the pedal to the floor.

Mostly in comfort mode.. can't remember the last time I've been in sport. Unimpressed to say the least haha but not really surprised. 91 octane.

http://www.fuelly.com/driver/gerbs/335i

That's actually really surprising, what is your avg mph? The least I've ever gotten was 21mpg and that was on my first tank with me punching it a lot because I was having way too much fun.

[jdong]

Latest fillup was 27MPG. So far, the first tanks have been:

26.3MPG, 24.8MPG, 26.8MPG, 27MPG. All using Chevron 91 octane winter blend in California.


Overall average in the AH3 is 26.3mpg over the first 1200 miles. My previous A4 2.0T averaged 23.7mpg over 35,000 miles. The first 4 fillups of the A4 were 20.5, 21.0, 16.7, and 22.9mpg.

So far, I'm extremely impressed by this car. More than 100HP additional power, but better fuel economy. I know I would not be getting these kinds of numbers with a 335i -- that'd probably be slightly worse than the A4 with my driving style.

[pkimM3r]

Originally Posted by elistan

Today's fill-up:

503.6 miles
15.191 gallons
33.15 mpg

iDrive reported 33.7 mpg

328i, mostly highway, mostly Comfort mode.

My S2000 gets 27.5mpg for the same sort of drive.

Wow 500+ miles. Im getting 250 at most.

[vigalent]

My last journey down the motorway in my 318d

Time: 58mins
Dist: 61 miles
Ave Speed: 64.9mph
Mpg: 78.2mpg!!!

Wow!!!!

[RASHID007]

Originally Posted by bnekic

You guys know that the winter blend of gas is being used now so your mpg's are reduced. (If your in an area with winter)

Wow I did not know that but I have noticed a drop from about 25mpg in my 335i to about 22mpg. I just assumed it had to do with the 17" winter rims and tires vs the 18" stock Pirelli tires.

Is that possible that tires make that big a difference?

[Elk]

Wheel size should not matter as the tires should be properly sized so that the rolling diameter is unchanged as you swap between summer and winter wheels.

Winter mileage drops with temperature as frictional losses greatly increase.

[jdong]

Originally Posted by Elk

Wheel size should not matter as the tires should be properly sized so that the rolling diameter is unchanged as you swap between summer and winter wheels.

Winter mileage drops with temperature as frictional losses greatly increase.

Wheel size does somewhat matter (more precisely, wheel mass distribution), but in the opposite direction. Larger wheels tend to have a radial center-of-mass farther from the center, which increases the moment of inertia. This increases the rolling resistance of the wheel, forcing the engine to work harder to achieve similar acceleration.

And with non-sport package, the stock Pirelli tires are low-rolling-resistance.

I agree that winter mileage drops with the temperature drop and the use of winter fuel, but I don't think the change of tires / wheels can be totally ignored either.

[Elk]

Originally Posted by jdong

Wheel size does somewhat matter (more precisely, wheel mass distribution), but in the opposite direction.

Fun point but, as you point out, going with smaller wheels should increase mileage.

I have not done the math, but I suspect the difference is negligible.

[jdong]

Agreed, the difference is probably negligible. I was pretty surprised when very underinflated tires were only shown to decrease fuel economy by 5% or so.

[dude987]

Update on MPG 335i xDrive.

[Boosted John]

I drove down to Orlando and back. I was doing about 90mph most of the time and I got 30.4mpg for the whole trip. I think that is pretty damn good.

[Boosted John]

Originally Posted by jdong

Latest fillup was 27MPG. So far, the first tanks have been:

26.3MPG, 24.8MPG, 26.8MPG, 27MPG. All using Chevron 91 octane winter blend in California.


Overall average in the AH3 is 26.3mpg over the first 1200 miles. My previous A4 2.0T averaged 23.7mpg over 35,000 miles. The first 4 fillups of the A4 were 20.5, 21.0, 16.7, and 22.9mpg.

So far, I'm extremely impressed by this car. More than 100HP additional power, but better fuel economy. I know I would not be getting these kinds of numbers with a 335i -- that'd probably be slightly worse than the A4 with my driving style.

That's pretty good. I'd be pretty satisfied with that since I was getting 21.1 in my E90 335. I'm picking mine up tomorrow and I'm not sure how I will be able to sleep tonight.

[Junkyard]

So the Monroney sticker indicates 20 city 30 highway with an expected average of 24 for my 2013 335xi. After the first tank of gas and a 50/50 mix of comfort and Eco, I've traveled 347 miles at an average speed of 31.2 mph and managed to get 24.6 mpg. Actual mpg closer to 23.5 (350 miles / 14.9 gallons) at fill-up.

[pkimM3r]

How do you guys avg such high mileage? This is on my latest trip. Almost all highway as you can see be average speed it was probably a couple miles to the golf course once i got off the freeway. I even reset the trip meter while on the highway already.

I thought it would at least be 30mpg with that much highway miles.

[SoFlo_Nick]

Originally Posted by gerbs

getting about 16 mpg with 90% city 10% highway.

I drive quite conservatively too (don't even have a chance to gun it much, and when I do it's more for necessity...) I have yet to put the pedal to the floor.

Mostly in comfort mode.. can't remember the last time I've been in sport. Unimpressed to say the least haha but not really surprised. 91 octane.

http://www.fuelly.com/driver/gerbs/335i

Don't Worry my 335i brother i get similar to yours, Around 320 Miles for a tank

[WilliamE92]

I can push my 335 MT up to 25 city using the ASS and eco pro exclusively

This drops to about 22 city in sport/comfort mode

Highway gets the advertised 30 MPG