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Nissan Altima Hybrid

321 messages,  Last post on Nov 19, 2009 at 9:31 PM

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What is this discussion about? Nissan Altima Hybrid, Sedan


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#212 of 321
Re: First 10,000 miles [irecycle] by fxbor
Dec 21, 2007 (6:52 pm)
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Replying to: irecycle (Dec 20, 2007 9:34 am)

I'm getting only 27.5 MPG on my Altima Hybrid after two tank fills here in the suburbs of Porttland, Oregon. My trips are usually short, 3-8 miles on flat terrain. I'm also registered at http://www.fueleconomy.gov.
 
I had expected some decrease in MPG compared to the average based upon my short trips. I had not however, expected a 7 MPG decrease.
 
If someone is looking for great mileage for short commutes, better to buy a clean diesel (when they become available) as opposed to a hybrid.
#214 of 321
Cold engine by karolpl7
Dec 23, 2007 (9:12 pm)
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Does anyone experience occasional slight shudders when the engine is cold for the first one or two minutes after starting?
 
For example, I started the car today, first time in two days, it's about 50F outside, pull out from the parking lot, and I can feel as if the car is trying to switch to EV mode, but the engine is too cold yet so it doesn't. You can feel those little shudders from time to time, some are stronger. It's was annoying at first, but need to ask Nissan service during first oil change.
 
Any one experiencing the same? Thanx,
 
karolpl7
#215 of 321
Re: Cold engine [karolpl7] by mazda6dude
Dec 24, 2007 (6:55 am)
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Replying to: karolpl7 (Dec 23, 2007 9:12 pm)

Every morning when I start my NAH, it starts the engine in less than a minute. Sometimes the shudder is worse than some mornings. For the first 15-20 minutes the engine warms up and the blue cold light turns off. When the blue light turns off, the engine is still warming because I would turn on my heater and at red lights, the car would turn go out of EV Mode and if I turn the heater off, the it would go back to EV mode. I would say, this is all normal because in general, hybrids work the best when the engine is running hot not cold. As for the shudders, sometimes it shudders very hard.
#216 of 321
Re: Cold engine [mazda6dude] by karolpl7
Dec 24, 2007 (8:13 am)
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Replying to: mazda6dude (Dec 24, 2007 6:55 am)

Thanx for the info mazda6dude.
 
The shudders is what I'm concerned, but I see you experience the same.
It runs smoother after 1-2 minutes and is all fine after 5 I would say. It does take 10 minutes or so for the cold engine light to go off, unless you start driving and it goes away faster. Probably depends how really cold it is.
 
I was little bit surprised you can't just press the gas while parked, to rev up the engine. It doesn't do much. Kind of miss my '98 Honda where I new exactly what was going on.
 
I wish I could have read about this in countless reviews that are out there. Hope our friends in CA don't have the same problem. Thank you cold east coast...
 
karolpl7
#217 of 321
Re: First 10,000 miles [irecycle] by langjie
Dec 24, 2007 (9:27 am)
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Replying to: irecycle (Dec 20, 2007 9:34 am)

i'm #5
#218 of 321
Re: First 10,000 miles [fxbor] by hiwayman
Dec 26, 2007 (10:07 am)
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Replying to: fxbor (Dec 21, 2007 6:52 pm)

The reason your gas mileage isn't very good, is because your car doesn't have time to warm up. Warm oil and warm parts have the proper friction for best efficiency. Hybrids are almost magical, but the reality is that the ICE (Internal Combustion Engine) has to warm up, as do all the other bits and pieces, before the car is running at max efficiency. 5 to 8 miles isn't enough, especially in cool weather.
 
In regard to the shuddering, I live in Northern California. We've had some unseasonably cool weather just before the holidays. Frost almost every morning. In this weather, the car definitely shudders harder when the ICE kicks in, until it warms up. This is reasonable, considering that all the fluids (oils, greases, coolants) are all pretty viscous (even if the oil is a very thin 0w 20). Over longer trips, as the systems warm to their tasks, the shuddering returns to the slight bump we'd feel in the summer months. I am a backyard mechanic, and have listened for odd noises or behaviors. I don't think the harder bump is a problem. If it keeps bumping/shuddering hard come April/May, then we'll go see Nissan...
#219 of 321
Re: First 10,000 miles [hiwayman] by mazda6dude
Dec 26, 2007 (11:09 am)
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Replying to: hiwayman (Dec 26, 2007 10:07 am)

hiwayman do you think using 0w20 oil instead of 5w30 will make a difference in gas mileage? Also, is synthetic better? Thanks.
#220 of 321
Re: First 10,000 miles [hiwayman] by karolpl7
Dec 26, 2007 (2:21 pm)
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Replying to: hiwayman (Dec 26, 2007 10:07 am)

Thanx for the response hiwayman, good stuff, bloody winter...
#221 of 321
Re: First 10,000 miles [hiwayman] by irecycle
Dec 26, 2007 (7:28 pm)
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Replying to: hiwayman (Dec 26, 2007 10:07 am)

I believe you are right about gas mileage being low when mostly short trips are made. I made a trip to the hardware store of only 5 miles one way and the ICE was running almost all the time. With the temperature around 39 the ICE seems to run even at traffic lights. I think what I need to get is a plug-in hybrid that will run on electric only for the first 20 miles or more. I am afraid that with my driving needs I will always get disappointing mileage with this hybrid.

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