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Search: Posts Made By: sward
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Replies: 26
Views: 6,373
Posted By sward

Re: MPG on my 2009 NAH

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... ;)
Replies: 26
Views: 6,373
Posted By sward

Re: MPG on my 2009 NAH

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...
Replies: 3
Views: 3,595
Posted By sward

Re: CVT Transmission Warranty Extension

Yeah, I got one too. I think they're responding to concerns about their own CVT design (available on several non-hybrid models), which is a totally different animal from the planetary-gear...
Replies: 26
Views: 6,373
Posted By sward

Re: MPG on my 2009 NAH

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...
Replies: 15
Views: 49,705
Posted By sward

Re: does using 0w30 instead of 0w20 make a difference?

My first couple of oil changes were 5W30 instead of 0W20, and it didn't affect my mileage noticeably. Certainly less than 5% difference (probably more like 2%).

Temperature and driving conditions...
07-22-2009, 05:10 AM
Replies: 11
Views: 5,884
Posted By sward

Re: How much has your mileage improved?

Old car: '93 Mazda MX6 (2.5L V6): 22 mpg overall, 27 mpg best tank.
New car: '07 Nissan Altima Hybrid (2.5L I4): 36 mpg overall, 43 mpg best tank.

Improved by 62% overall. Best tank...
Replies: 3
Views: 4,435
Posted By sward

Re: Cold Start Up Hesitation

The engine is rougher when cold (as is true of every car I've ever driven); one of the ways this shows up is in a rougher transition from battery to engine. I haven't noticed any actual hesitation,...
Replies: 29
Views: 14,201
Posted By sward

Re: '07 NAH intermittent start problems

I agree, it probably has nothing to do with the key fob - especially since you had the same problem when the fob was plugged in physically. The behavior sounds more like what happens when you try to...
Replies: 7
Views: 3,321
Posted By sward

Re: Winter Fuel Efficiency

Yesterday, with highs in the mid-teens, I got 29mpg on my 6-7 mile commute.

Today, with highs in the mid-forties, I got 35mpg.
11-14-2008, 05:55 AM
Replies: 5
Views: 4,390
Posted By sward

Re: AFS Trinity dust-up

$/mile won't work very well either, because it is too variable to make any meaningful comparison. Even if the tech remains unchanged, price changes will make comparisons (over time) meaningless. My...
Replies: 19
Views: 11,819
Posted By sward

Re: snow performance

I had no particular problems with winter driving in MA last year, even though I left the stock tires on my NAH. Traction control and ABS worked great.

I didn't really push my luck though - I...
Replies: 25
Views: 6,739
Posted By sward

Re: 800 mile tank?

Yup, those sound like ideal driving conditions for the NAH. Congrats!
Replies: 25
Views: 6,739
Posted By sward

Re: 800 mile tank?

Congrats!

46 mpg on the display is certainly possible, I've seen 50+ on extended trips (but never on a whole tank - the cold startup penalty is too much).

Out of curiosity, how long is your...
Replies: 25
Views: 6,739
Posted By sward

Re: 800 mile tank?

Agreed, it is certainly possible, provided you're doing more then 42mpg AND had the tank topped off to start with. If your last fuel load was a bit light, you'd be better off with at least 43mpg on...
Replies: 26
Views: 7,786
Posted By sward

Re: Hypermiling vs. Not

Don't forget that the NAH has a few standard features (traction/stability control, ABS) that are extra-cost options on the base Altima 2.5S (last time I checked). I think that wipes out a good chunk...
Replies: 13
Views: 5,660
Posted By sward

Re: Clunk in the trunk

Ditto. I don't have this problem, but my last car did - and it was the jack rattling around.
Replies: 1
Views: 2,542
Posted By sward

Re: Nissan, GM and Ford agree to build hybrid taxis for NYC

I expect they'll hold up reasonably well, from a cost and maintenance perspective. What I'd be concerned about is the trunk space, which strikes me as a real drawback in a taxi. On the other hand,...
Replies: 9
Views: 6,386
Posted By sward

Re: Gas and warning Light

I agree, the early warning is much too early. I go mostly by the trip computer, although you have to adjust for seasonal differences (I've had tanks ranging from 500+ to 750 miles, depending on the...
Replies: 28
Views: 7,942
Posted By sward

Re: Learning the Hybrid Altima

Oh, and a word of explanation about sudden braking and its effect on regen:

When you have to stomp on the brakes, then the conventional friction brakes do most of the work (they're still the most...
Replies: 28
Views: 7,942
Posted By sward

Re: Learning the Hybrid Altima

Not that I've ever seen. My FE seems to be fairly consistent throughout the tank, if the driving pattern is the same.

I assume you saw reduced regen braking because of mid-day heat?



Stop...
Replies: 28
Views: 7,942
Posted By sward

Re: Learning the Hybrid Altima

Good point about planning ahead (when you're on a well-known route) to do the recharging at an effective time (i.e. not when stopped at a light). Likewise, you don't want to come to a long downhill...
Replies: 28
Views: 7,942
Posted By sward

Re: Learning the Hybrid Altima

I'm not convinced that it actually pays to stay in EV mode when accelerating away from a light; use the ICE for what it is best at, and let the electric motor help maintain your cruising speed once...
Replies: 19
Views: 4,405
Posted By sward

Re: 44mpg on the highway!

Don't know what could be causing that; I haven't seen numbers that low except in the dead of winter.

The 'sweet spot' (as far as I've been able to determine) is in the 30-45 mph range, in mild...
Forum: Hydrogen
06-18-2008, 06:17 PM
Replies: 26
Views: 9,928
Posted By sward

Re: how long before fuel cell cars make an impact?

OK, here's one source (Scientific American 2006, "Hybrid Vehicles Gain Traction" - Google it to find the links). The last page says fuel-cell efficiency is on the order of 25% (assuming electrolysis...
Forum: Hydrogen
06-18-2008, 07:37 AM
Replies: 26
Views: 9,928
Posted By sward

Re: how long before fuel cell cars make an impact?

Any evidence for that? Because that is exactly backwards from what I've seen.

Now, I must admit that I don't have the counter-evidence handy either; I'll look for it when I get some time.
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