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Sedans Infiniti G35 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
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Replying to: durangojay (Sep 11, 2008 11:04 am) You noted you live in Colorado at an elevation above sea level of 6,600 feet. You might find some interesting information in your owners' manual under "Fuel Recommendations." There is a subsection about operating the vehicle above 4,000 feet......at least there is in my 04 Coupe manual. Jack |
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Replying to: durangojay (Sep 15, 2008 12:47 pm) My 04 G35 Coupe's owners' manual states a fuel recommendation, not a fuel requirement. Is that because the 306hp and 330hp engines actually require a higher octane rating? Could you check your owners manuals on that? Thanks, Jack |
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Replying to: pscheid (Oct 05, 2008 6:15 pm) |
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At the risk of going off thread...my car is almost ready. Thursday or Friday hopefully. It has taken about 21 man-hour working days to repair. No major frame damage, which is good. Thanks for the great posts. I get nowhere near what you guys are getting in city MPG. Will continue to post MPG after I get the car back. And yes, I really did get a Dodge Durango rental loaner covered under insurance. Weird, but true. p.s. Cannot wait to get back in that sweet ride! 
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Replying to: durangojay (Oct 07, 2008 6:16 am) Look at it this way....after that durango...you'll enjoy your G's MPG lol |
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You are spot on, John. I just read most of the recent posts. Some responses: I will be switching to a tire, year round, that is more geared toward wet/slush/snow. I will give up a bit in performance, but feel more secure. Also, thanks for the heads up about the fuel recommendations section in the manual. I don't have it now, obviously, but will check it out when I get the vehicle back. Perhaps I will be switching octane grades after all this. However, I seemed to have been getting excellent performance so far with a premium grade. Stay tuned.
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Replying to: durangojay (Oct 07, 2008 6:31 am) Second, I was wondering if at your altitude of 6,600 feet above sea level that the altitude and rarified air has a negative impact on the fuel economy. Engine management systems can and do adjust the fuel/air mixture to accommodate for the reduced oxygen in a given amount of air by adjusting the fuel component. This is more of a "protection" adjustment to prevent detonation and control engine operating temperatures. But completely overcoming or compensating for the reduced oxygen content? I don't think so. I would expect fuel economy and acceleration stats to be adversely affected, regardless. Someone who knows more about this stuff than I do.......help us out here. Finally, if you are looking for an all season tire replacement instead of snows, you may want to read my thread on the G35 Coupe in the snow. Main Topic: INFINITY G35 COUPE Subtopic: G35 Coupe in the snow. Guys with RWD and AWD Infinities and other makes have responded with their experiences and recommendations, some tire brand and tire model-specific. I have a RWD Coupe, live in MA. (snow), and am looking to switch to an all season alternative myself. Have spent considerable time on the NTB website reading tire owner survey opinions, 13 different road condition stats, and expert road tests with a concentration on Infinity and BMW owners' experiences. My choice at the moment is the Bridgestone Potenza 960, and about 100 pounds in the trunk during the winter snows. While winter tires would be optimal, I can't bring myself to dedicating a $1,400+ set of rims and tires to accommodate the half dozen days a winter where I might get 6+ inches and road crews falling behind. Then I have to buy a new set of tires $900+ next March for the Spring, Summer, and Fall. At the rate the G Coupe chews up tires, irrespective of one's driving habits, it is looking like MPG and fuel expense is not far ahead of tire expense on the concern list. Some folks don't worry about total ownership expenses (taxes, insurance, depreciation, fuel mileage, tires, reliability/repair associated expenses, etc.). Some do. When you pick up your car, don't forget to bring the searchlight and magnifying glass to examine the repairs. Bring an anal/retentive nitpicking friend along too.....they can be helpful once in a while. 
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Thanks for the good words. I do feel that the altitude may have something to do with my reduced gas mileage. Other than look in the manual for suggestions and read helpful posts here, I don't know what to do. The body shop doing the work is absolutely top notch, but I will take your words under advisement. Unfortunately, most of the work performed is WELL above my comprehension. The best I will be able to do will be to check out the paintwork, fit and finish, take it for a drive, etc. As I have AWD I am not going to get snow tires, per se. Just something with a little more wet grip. I ran my OEM tires through a horrendously heavy snow year last winter and I was quite pleased with the results. So a small upgrade would be just the ticket. Thanks again. Jay.
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After 70,000 incredibly enjoyable miles...around town between 23-24mpg and on the highway (70-75mph) 27-28 mpg using 89 octane half the time, 87 the other half.
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Replying to: clay2000nc (Oct 23, 2008 3:42 pm) 
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