What's your MPG (6MT only please) for....

1. City
2. Highway
3. Mixed

And, can you run lower than premium fuel?

Thanks,

 

depends how you drive... also don't recommend putting lower than 91 octane to get full performance but I have put 89 in mine im not gonna lie and it still drives nice. I would never put 87 in it.

 

I've been doing 16mpg city on my 05 with the AC on all the time. I have not done many miles so hopefully it will improve but I doubt it. I love banging the gears and hearing the motor growl.

I don't see any point of putting 89 instead of 91. It's only a couple of bucks more per fill up and what the motor wants. I rather not risk any performance loss or problems and save money somewhere else.

 

16-17 city (various speeds)
26.36 highway (70-75mph)
17-18 mixed
04 6spd sedan

 

Only city with AC -- 15.5 to 16.5
Only Highway with AC -- 23 TO 25

Have 7000 miles now , MPG does not seem to improve

 

I get a constant 18-19mpg driving about 50/50 city highway. I'm not thrilled about the mpg, but than again I would not be thrilled to drive a more fuel effecient car

Oh and I do drive my car "aggressive"

 

about 17 citi and 24-25 highway which end up around 21 on average for me ... but my car has only 850 miles on it so far so Im hoping that will improve a tad bit(with normal driving) but then again it probably wont as I will start driving it properly soon Still way better than I was getting in my 03 5AT.

 

Hey DT, good to see you looking at the 6MT ... great decision.

I average 21-22 with 50/50 mixed driving, and I actually got 27.44 out of my last tank driving out to Palm Desert and back. Not that it's easy to do, but keep the rpms low in the city and stay at 75 or below on the highway and you won't be disappointed.

 

21 city
25-26 highway
21-22 mixed

 

16 city
18.5 highway
17 mixed

I've never gotten more than 340 from a single tank (17.5 gallons at fill-up), and that was on a road trip where I was able to use cruise pretty much the whole way.

I average about 300 per tank, and the most gas I can ever get in there is 17.5 gallons, with the needle as low as I'd ever care to let it go.

 

The results posted so far are very disappointing. What’s wrong with this car? Sixth gear, 3400 lbs. and low drag coefficient should equate to better fuel economy at least on the highway. Something isn’t right. How does the BMW 330 get 30-31 mpg on the highway? Maybe is the 3.0 vs. 3.5 liters?

 

My guess is the gearing......

 

330i that my friend has (coupe, auto) got 24.5 mpg on our last highway trip of 200 miles.

 

FourDour ... I agree, I wish highway was a bit higher, especially with the low drag. It's definitely the short gearing, although the 300hp can't be helping? Every gear is really short, and 6th gear is no exception. 80mph rotates at almost 3000rpm, which just drinks it up. I think if you can do highway speeds at 65-ish, and keep the second cam from coming online, you'll see more like 27-29mpg, but who drives like that? I know that's the secret of the corvette, right? 1-4 gear lockout and a really tall sixth gear that allows low cruising rpms.

 

I have been averaging in the low 20s with my 2005 6MT doing a semi-rural drive with occasional freeway runs ( most recent tank was 20.99 MPG ). I also wonder about the gearing. I came from a car where 100 RPM in 6th equalled about 5 miles per hour ( in the "normal" RPM range ). So, 1500 RPM was about 55 MPH and 2000 RPM was about 80 MPH. I think 55 MPH in the G is a little over 2000 RPM, and 80 MPH is around 3000 RPM. My old car had a 3.42 axle ratio and a .5 ( or was it .55 ) 6th gear ratio. I think 5th gear on that car had a deeper overdrive ( at about .75 ) than the G does in 6th. While I don't expect the VQ35 to have the torque to pull those kind of gear ratios, it woud seem that a lower numerical axle ratio could improve fuel economy. A lower rear axle ratio would also spread the gear ratios in the transmission a little bit so that each gear would be more useful without so much overlap. There have been a few people mentioning on here that they skip gears because the ratios are so close. The down side is the cost of a set of ( probably ) custom gears would probably never pay off in fuel savings.