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Infiniti G35 Real World MPG

391 messages,  Last post on May 11, 2009 at 5:25 PM

You are in the Infiniti G35 Forum. Your Hosts are pat & karens

What is this discussion about? Infiniti G35, Fuel Efficiency (MPG)


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#295 of 391
Re: Poor gas mileage [durangojay] by tfromatl
Aug 26, 2008 (4:53 am)
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Replying to: durangojay (Aug 25, 2008 6:22 pm)

I believe the K&N air filters help. I am not qualified to tell you how they will perform for you in Denver. I live in the Atlanta area (home of one of the worst commutes in the nation). One thing for sure, the K&N air filters will provide you with much better filtering of dust and dirt than the standard paper filters. All of my vehicles have them as I put K&N filters on with the first air filter change. As you may know, we (Atlanta) are suffering one of the worst droughts in our history that has held on for over 2 years (until this week, thankfully). We have extremely high pollen counts, dust and just nasty air that comes with living in metropolitan areas.
 
You will probably see an uptick in your mpg as the car breaks in. I know they say the G35 breaks in around 1k - 1.5k but my car has done nothing but improve in areas of performance, mpg and ride. It was a little bumpy toward the end of my rear tires' life but now with new rear tires the ride is better than ever. I hope this helps.
#296 of 391
Re: Poor gas mileage [krsboxster] by johninnj
Aug 26, 2008 (6:41 am)
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Replying to: krsboxster (Aug 25, 2008 7:49 pm)

Oddly enough....the stock programming is to hold each gear for WAY too long regardless of throttle. Showing off the 7600 redline? Who knows.
Try this....put it in M mode and short-shift every gear....about 10 mph per gear seems to be the way to go. I will bet you $ your city MPG improves. It's a little easier in mine (Paddles), but same concept.
#297 of 391
Poor gas mileage by durangojay
Aug 26, 2008 (7:24 am)
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Thanks for the insight people. Perhaps I will try the K&N filters, although it will take quite awhilw for the savings to kick in considering the cost of them. Perhaps I do have a heavier foot than I think, but coasting around is not what I boughta 306hp car for,,,stay tuned,,,Thanks again.
#298 of 391
GAS UPDATE by sweendogy
Aug 26, 2008 (4:54 pm)
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Replying to: durangojay (Aug 26, 2008 7:24 am)

10k miles on a 2007 g X. Mixed driving car still has a problem hitting 20mpg-- if I drive city only its around 17 .. On 2 recent highway runs of 300 and 200 miles i have seen just under 22 and just over 24 respectively. That is 90% highway with cruise engaged for most of the trip with an avg speed of 72 mph. I have tried using the manual mode when stuck in traffic to upshift as quick as possible before the car would automatically and have no idea if this is doing anything for mpgs. I would wait on the K and N filters until your in need of a new filter.
#299 of 391
Thanks for the input... by durangojay
Aug 27, 2008 (8:03 am)
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Thanks everyone for the advice. I guess I'm stuck with a powerful, luxury, beautiful looking car that just doesn't have the around town gas mileage I would like. But that's ok. I love the 306 ponys, and letting her loose once in a while. I got stopped yesterday for doing 55mph in a 35mph zone. Sherriff was pissed, BUT let me off with a warning. Unreal. Well keep those cards and letters coming. I love my Infiniti G35X. Long may it roll...
#300 of 391
Oh yeah... by durangojay
Aug 27, 2008 (8:13 am)
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By the way, I'm going to hold off on those K&N's for now. The savings equalibrium point is just too high. Cheaper just to replace with OEM stock. Thirt-eight bucks or so. Also, I know it's not in this thread, but people, PLEASE check/change your cabin micro-filter AT LEAST once a year. I just did mine at one year and 7500miles, and it was filthy. So it does it's job very well, but will impair your AC/heat flow-through system seriously if you don't replace it regularly. It's located behind the glove box. You can order it from an Infiniti/Nisson dealership and try to do it yourself (a little tricky!) or spend $25 and have them do it. It's just that the screws are hard to get at without the proper tools and you have to be somewhat of a contortionist to reach all of them. But trust me, it makes a big difference in the quality of your cabin air, ESPECIALLY if you live in dusty (me) or dirty city air areas. It's worth it. Mobil 1 every 3000-3500 doesn't hurt either. Make sure you use OEM oil filter with the CRUSH GASKET ($.80). Must use that gasket EVERY oil change to eliminate small, annoying leaks. Thanks agin everyone. Jay
#301 of 391
Road trip by durangojay
Aug 29, 2008 (7:16 am)
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I've got a 350 mile (each way) road trip this weekend. Will report back results, hopefully with no tickets. I have swithed gasoline to Exxon for a try, from Conoco, and added STP gas treatment to the tank. This is the second tankful in a row that has received it. The first did not seem to do much. We'll see. I'm hoping to see 24-26mpg on the hiighway.
#302 of 391
Re: Road trip [durangojay] by circlew
Aug 29, 2008 (7:47 am)
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Replying to: durangojay (Aug 29, 2008 7:16 am)

Use your cruise control and be vigilant of efficiency and the troopers! State funding is down and ticketing is UP! Looking forward to your results.
 
Safe driving!
 
Regards,OW
#303 of 391
Road trip by durangojay
Aug 29, 2008 (9:59 am)
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Thanks and hopefully Mr. Trooper will have nothing to do with me. Post later. Jay
#304 of 391
Reg Gas by johninnj
Aug 30, 2008 (5:59 am)
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In an act of desperation I have tried regular gas (on the 3rd tank). Much to my amazement and complete lack of understanding.....my MPGS are 1-2 better. What the heck is going on? Same gas station....same (Ish) driving cycle...etc.
I'm lost....I worry that a warranty repair will have them check the fuel and bust my stones about the gas....but I just don't get it.

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