Is this normal mpg for a 06 m35x

[xxxalpinexxx80]

Ok, so i just got a used m35x with 38k miles.. feels and drives brand new, but my gas gets drinked up pretty quick. according to the trip computer i get 13-15mpg average, in city driving, i can literaly drive 3x more on my honda odyssey with a full tank of gas compared to this, and they van says i believe 16,23 when this should do 17,24 is any one else getting gas mileages like mine, i know it has awd and alot of weight but i don't think it should average that low in city driving, i also dont push on the pedle hard at stop lights

[antzrus]

I've got about 40k. I use 89-92 octane alternately. I'm lucky if I get 15 mpg in town. I drive like an old man (I am an old man...); except around curves. I've gotten up to 27 mpg on a level highway @ 55mph; usually about 24 @ 70 mph.

This thirsty gas habit has been well discussed already herein. It's been all over all the Infinity sites. Hopefully you knew this before you put your $$$ down.

[83wildcat]

I have an '06 M35X and I get around 17 mpg around town and 23/24 on the highway (70 mph). 13 - 15 mpg aound town seems low (compared to my car). The worst I ever got was 15.5 mpg and that was during a week of heavy snow with at least 6" of snow on the roads. I've tried both 89 and 92 octance and didn't notice any difference in the mpg. Perhaps you trip computer is not correct - have you tried filling to the top, driving until you are near empty, refilling to the top and then dividing the miles by the refill gallons to get an actual mpg? Do you do a lot of running the engine while stopped - for example to warm up the car, or while chatting with a neighbor? This would definately kill your mpg. Could someone be stealing your gas? Did someone sneak a M45 engine into your car? :-) Even at 13 - 15 mpg, you still should be able to go at least 250 miles on a tank - is your Odyssey really going 700+ miles per tank?

[xxxalpinexxx80]

hmm, idn, on my honda i had for 8 years, i do the same thing every day, go to work then bank and so on then work later on, i do alot of city driving but on my van doing this it will look like it moved 3mm while on the m35x my tank would go down to almost 3/4, and driving from boston,ma to newport, ri 93 miles, it will go down a little lower then 3/4 and it feels like the m35x would be almost out of gas, although i have not done that distance yet with this vehicle but maybe so within the next 2 weeks so i can let you know how that goes

I got the car wensday, and refilled it saturday since their was about 5 gallons left

[M4T5]

I can get about 24mpg @ 70mph on highway in my M45 rwd. Though avg is around 16-18mpg due to mostly city driving.When I start to get those wild hairs.... avg plumets to around 13...

J

[83wildcat]

I've found that going by the gas gauge is not an accurate measure of how the car is burning gas. The best is to top it off, run it down, refill and divide miles driven by gallons used. Do this on both your M35X and Honda, it would be interesting to see the results.

[AlbuquerqueM45sport]

When I read your statements it sounds like you are concerned about a couple of different things. First you are worried about how often you fill your tank in comparison to a different vehicle. You do understand that each vehicle has a different size gas tank so this type of comparison is irrelevant. I mean I have a Porsche with a 12 gallon tank and an excursion with a 44 gallon tank. One vehicle is designed for high speed corners with weight a concern the other for towing large objects on the highway. The Porsche goes about 300 miles on a tank and the excursion about 750 miles on a tank. However, the M45 I have is a high speed luxury car designed to run very fast with four adults on mountain roads, highway or in the city. I go about 300 miles on a tank sometimes only 250 miles on a tank, either way the miles per gallon was not figured in any of these examples. As others have stated the miles per gallon comparison is done by miles driven vs. gallons of gas used. And as I have stated, along with others on this very topic this is not an economy car. I assume you understood this is a high performance vehicle with a different set of engineering goals as the design criteria. There are a number of high mpg vehicles for sale right now; I don’t believe Infiniti has any of them. For the record my M 45 sport driven as it was designed gets about 14-17 mpg in the city, and about 19 mpg on the highway. But I don’t really care about mpg with this car. My wife’s Honda accord and my daughters Toyota Camry, that’s a different story.

[M4T5]

Just because Infiniti engineered the car for speed and luxury doesn't mean they couldn't have made it economical. Some of you think just because you have money and that this is a luxury vehicle, that fuel economy should be overlooked. I tend to differ. If they are so good at engineering, they could have engineered these engines to produce the same or power and get a lot better fuel economy. I think they simply did not want to put anymore time or money into these cars at the time to achieve better fuel economy. It could have been done. They could have used better variable valve timing tables, cylinder alterations/ deactivation technology, do away with the cams, springs, timing chains/ belts and gears (ever heard of electronic actuated type valves?). I think my last option would have been the best route. One way or the other, I would prefer a luxury vehicle to achieve great fuel economy. That should go into the technology of the vehicle automatically. If I purchased a "real sports car", then I should be expecting poor fuel economy. I'm sorry, but luxury or not, Infiniti and anyone else that produces sedans that get poor fuel economy need to wake up. Inevitably, gas prices are going back up and consumers will look at other alternatives (wealthy individuals or not) over sedans that net you poor fuel mileage.There's really nothing to burn me about on this subject. So save your thoughts and finger tips for something else. This is fact and some of my opinion. If you think differently, then start pulling your head out of your a$$. Your money can't buy you more oil from the earths ground forever.

J
Modified by M4T5 at 6:42 AM 1/19/2009

[msk914]

Yes, it is normal. I get 17.2 mpg in a mix of city/hwy driving over about 27k miles. That's typically about 14-15 in the city, and 20 or a bit more on the hwy. I did one highway trip where I drove like I was 90, I managed 24 mpg, but who would want this car and then to drive at 55-60, coasting down the hills, not I.

[szh]

Just because Infiniti engineered the car for speed and luxury doesn't mean they couldn't have made it economical....I'm sorry, but luxury or not, Infiniti and anyone else that produces sedans that get poor fuel economy need to wake up. Inevitably, gas prices are going back up and consumers will look at other alternatives (wealthy individuals or not) over sedans that net you poor fuel mileage.There's really nothing to burn me about on this subject. So save your thoughts and finger tips for something else. This is fact and some of my opinion. If you think differently, then start pulling your head out of your a$$.

Remember that these are high-powered 6 and 8 cylinder engines ... no matter how you tweak things, you are not going to get the same mileage as lower power sixes, or 4 cylinder econoboxes - or even close to that mileage! Anybody who expected that cannot have been thinking clearly. This is not just an Infiniti issue - look at the Acura and Lexus line-up for exampels.

And, given different gas tank capacities, we cannot expect that the total "miles per fill" is going to be the same. The best you can do is estimate the outcome ... from the printed mileage ratings.

Yes, Infiniti did not worry about mileage for these cars - that was not their market focus, so they did not even shoot for that as a major design intent. Castigating them for this is pointless, since the company, Nissan Motor Corporation, relies on their Nissan line up of cars (like the Versa and others) to provide the cars that people want for mileage.

The point being that , like most M purchasers, I did not buy my car for gas savings purposes. If I had been focused on high mileage, I would have purchased something entirely different.

Your money can't buy you more oil from the earths ground forever.

I have to admit that, at my age, I probably do not worry about this issue as much as I ought to. I should, I suppose ...

Anyway, yes, this is a fact for sure, but that is an entirely different issue, and I'd like to avoid getting into it here in this forum ... we try to keep these general discussions in the Politics or General Char forum at NICO.

Z

[xxxalpinexxx80]

yeah i understand, i just wanted to know if maby you guys changed a part and the mpg was significantly higher, such as filters and what not, the dealer told me everything was changed but i will take a look at it when i get the chance but take a look at this honda and m has same tankhttp://www.edmunds.com/used/20....html

http://www.edmunds.com/used/20....html

on edmund it reports 16/22 when i thought it was 17/24

[M4T5]

Though, I'm sure your points are valid. Though, there are still ways that 4.5L could get a lot better city mileage. Besides the point that they are high powered. If GM can do it with the Vette, then Infiniti could do it with their V8 M's as well. It would just take a little more engineering in the computer, valve train, fuel system, and transmission. If the M45 could achieve better than average fuel economy than equivalent like vehicles, I would have to bet more buyers would buy this car over other luxury lines. Some wealthy people still look at fuel economy in the buying process. We all should start looking at this issue a bit more strongly these days. I still consider myself young these days at 30. If it wasn't for our children having to deal with these issues even more in depth in their lifetime, then maybe I would just turn my head and shrub my shoulders on this rising issue.Our children are depending on our actions of yesterday, today, and from here on out. Sorry to rant about this issue any further....

J

[tytamto]

Mfourtyfive,

You have to make sure that you compare apples to apples here. A C6 Vette (for example) is almost 800lbs lighter than my M45. It is also a lot more aerodynamic, and has rather tall-gearing.

On the other had, my friend owns a C5 Z06 with 405hp and get 26mpg when cruising on the highway in 6th gear.

Like it or not, it is OK for the M's to average about 16-18mpg in the winter in a combined cycle.

[M4T5]

Mfourtyfive,

You have to make sure that you compare apples to apples here. A C6 Vette (for example) is almost 800lbs lighter than my M45. It is also a lot more aerodynamic, and has rather tall-gearing.

On the other had, my friend owns a C5 Z06 with 405hp and get 26mpg when cruising on the highway in 6th gear.

Like it or not, it is OK for the M's to average about 16-18mpg in the winter in a combined cycle.

Like I said, if GM can do it, so could Infiniti. We may not be comparing the same type cars, but the C5 Vette's HP and engine size difference should make up the 800lbs difference of the M. Agree?

J

[tytamto]

Like I said, if GM can do it, so could Infiniti. We may not be comparing the same type cars, but the C5 Vette's HP and engine size difference should make up the 800lbs difference of the M. Agree?

J

Somewhat agree. But the LS series motor has a lot more history and r&d behind it, even though some might call it dated by now. GM has done a tremendous job with that engine. In most iterations it might not be as powerful as it could be, but on the other hand, thanks to that, it is rather bulletproof. There is a lot GM bashing going on right now, but unswervingly so. They have come up with stellar designs in Europe, China, South America, and Australia. They just treat their home market like crap (outside of Caddi).

Going back to Vette vs. M, gearing and aerodynamic posture of the Vette gives it even more advantage. But there are times when I would like my M45 to be more fuel efficient... but when that happens, I just take my wife's Audi instead.

[digiboy]

Like I said, if GM can do it, so could Infiniti. We may not be comparing the same type cars, but the C5 Vette's HP and engine size difference should make up the 800lbs difference of the M. Agree?

J

I disagree - GM hasn't done any of the sort. The vette has horrible reliability. The M has incredible reliability.

Cost/Quality/Performance - the triumverate of engineering. If you fix Cost, you are going to be playing with Quality and Performance - make it perform better without increasing cost - you get lower quality. If you make the Quality higher - you lose performance.

Within performance, you can have better mpgs or better torque. Nissan went for torque on the M. Toyota went for MPG on the GS. Even there - they are fairly close in both speed and mpgs.

If you really want good economy in this class, you have to go diesel and then you'll end up with all the performance issues related to a diesel engine (nose heavy, noisier, etc).

[antzrus]

Oh come on guys. The M as it is was never produced for the green thumb approach. It was meant clear and simple to be a polar ice melter and one of the best quality luxury "sportz" sedans for the money. It's apparently time for that particular niche to change according to some and no doubt it will with time and demand forcing the issue.

But until then: Zoooom, ZOOOOOOOOOOMMMMMM!!!

[szh]

If you want to stop using gas, or worry about gas mileage, here you go!!My boss just got his new car delivered last week. I have not gotten a promised drive yet ... but will do so soon!

One of the pictures shows my M45 in the background (upper left). Camera phone, so the pictures aren't perfect ... sorry!

Click on the thumbnails for the larger images!



Z

[tigerclaws1318]

If you want to stop using gas, or worry about gas mileage, here you go!!My boss just got his new car delivered last week. I have not gotten a promised drive yet ... but will do so soon!

One of the pictures shows my M45 in the background (upper left). Camera phone, so the pictures aren't perfect ... sorry!

Click on the thumbnails for the larger images!



Z

oh sweet, a tesla lolgood luck charging one of those things. charging those things can range from a few hours to who knows how long depending on the amp charging rate

[szh]

oh sweet, a tesla lolgood luck charging one of those things. charging those things can range from a few hours to who knows how long depending on the amp charging rate

3.5 hours with the Home Fast Charger if you are completely drained, less time if not! Can be done at home with the power connection install they did at his place.

A perfect daily commuting car ...

Z