realmac- you could even push the tire pressure to 38-40 and see what response you get. test for traction issues (meaning if you lose any noticeable traction) but overall, may of the hyper-milers run far above 40. I run mine at 35-38 now and get 33ish based on calculations. But because you have different rims and tires, you may need to do a GPS calibration to see if there are any minor errors in calcualtion in speed and distance you have to account for.

 

700 miles on one tank is well within the NAH's capabilities; a few folks have even gone 800 miles (under ideal conditions). Just remember, the 'fuel warning' is way too conservative; it says to fill up when you've still got 3 gallons left.

Weather and driving conditions matter though - you probably won't get 700 miles driving at 80 on the highway, and you definitely won't do that well in freezing weather (my winter tanks average more like 550 miles).

 

Yeah, noticeable drop in mileage in past week as the temps have cooled. Engine warm up takes much longer as well, adding to the additional ICE gas consumption.

 

yu888:

You might want to try an engine block heater and a grill block.
Helps a little.

 

Sward, what do you mean ideal conditions. On my commute, mostly freeway driving at about 62 and normal Bay Area commute time (8am & 5pm) traffic (stop and go) I have been able to get well over 700 and the best tank that I have ever gotten was 880 miles. It does take practice and patience to do that. My normal commute on that route was 25 miles one way. Now I have a different commute 56 miles one way. I am still learning the route, but it is still mostly freeway. My last tank was 670.7 and 18.848 gallons. By the way, that still leaves just under 4 gallons in my 07 NAH. If you think that 880 was a fluke, I have had 7 tanks over 800 of those 3 were over 850. Also if you question where I come up with 22.5 gallons in a "20" gallon tank, I have had that discussion before. Even if the gas stations are crooked, all it means to me is that instead of getting from 38-41mpg, I would be doing much better if you calc it by distance by "max of 20 gallons". Those commutes are far from ideal, but I have found that best mileage happens when in commute traffic.

 

Pimemover_nah, I am doing the opposite commute now. San Jose to Emeryville. Seem to get much better mileage headed North instead of South on 880.
Do you watch both your power gauge and instantaneous mileage.
I have found that if I don't go much over level (maybe 25kw-ish) and watch the instantaneous mileage trying to maximize the amount of time that it is over 40 and many times around about 50, that is when I get the really high average tanks.

 

I don't doubt your numbers - but the averages for most drivers in the database are lower.

I'll explain a bit more about what I consider to be "ideal conditions"; other posters may have somewhat different experiences.

1. No short trips on a cold engine: your commute is 25 (or 50+) miles, mine is 6 miles. That means my car spends a much larger percentage of its time in the "warmup" period.

2. Mild weather: you're driving in the Bay area, I'm driving in New England. 'nuf said.

3. Moderate traffic: I get best results in suburban driving, not city or highway.

As an example, I have one regular trip of 35 miles on suburban streets; in summer, I routinely get 48-50mpg on that drive. That would easily translate to 800+ miles on one tank. But my commute (similar conditions, but much shorter) means that on most summertime tanks I only get 40mpg (720-750 miles on a tank, putting in about 18.5gal).

 

Good list and similar to what i figured out too. It looks like #1 is killing me the most, well, that and hills. Many parts of the bay area should be the most ideal given suburban driving allowing for longer stretches of 30-40mph cruises and long braking but sadly not where i am and combined with hills... sigh. Note to self: move to better location for better mileage

 

Well, short trips may not be very good for mileage, but a short commute is very good for your fuel costs. So it isn't all bad news...

 

Yeah, sounds correct. For me the killers are short trips (whether the engine is cold or not). The hills here sometimes help, but you really need to learn to drive them. Last night I filled up it took 18.8 gallons and I went 670 miles. Today when I finished my drive to work, 62 miles, mileage guage said 41.1mpg, so I already know that it's about 1.5 miles high, so I was probably able to do about 39 something. Most of that was at ~60 - 62 mph. Maybe commute time here is like your suburban driving. I know that my mileage really takes a hit when I get to use the car pool lane.