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Infiniti FX45 Real World MPG

18 messages,  Last post on Feb 20, 2009 at 12:16 PM

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What is this discussion about? Infiniti FX45, Infiniti QX56, Infiniti QX4, Fuel Efficiency (MPG), SUV

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#14 of 18 Re: WOW u guys !!! [hovy] by ttummy Jun 22, 2007 (5:41 am)
Replying to: hovy (Jun 21, 2007 8:27 pm) The V8 and V6 get almost the same MPG, only about 2mpg difference.   There are several factors that I've found help MPG: 1) Check you tire pressure, I found that 35 PSI cold presure helps over the stock 32 PSI. 2) Put in an aftermarket air intake or at least a K+N filter. I got about 2mpg just from installing a K+N filter and the car feels faster, though I haven't dynoed to see if it actually is more powerful. 3) Install lowering springs. Just 1" lower and you will get better handling and a slight improvement in highway MPG. 4) Turn off the air con when possible. 5) Drive with the windows up.
#15 of 18 FX 45 MPG by jdonahue Jan 16, 2008 (7:30 am)
I have an 06 FX 45 with 35K. I average 16-17 mpg around town and about 18-19 hwy running 70-75 mph. When the car was brand new I got 24 mpg out of one tank of gas. Don't think the mpg has tipped 20 since.
#16 of 18 Milage. by ferrari99 Jan 25, 2008 (2:21 pm)
FX45 -03 42K Miles. Avg mostly city is 16.2 for the last 3 years.
#17 of 18 Re: Infiniti FX45: Real World MPG [steve_] by msticks Feb 20, 2009 (12:06 pm)
Replying to: steve_ (Jun 16, 2006 1:02 pm) I've had my FX45 since it was new back in 2004. I always use premium and the best mileage I've ever gotten (all highway - 65 mph or slower) was right at 20 mpg. If I drive my usual 70-75 mph I'll get 18 mpg or so as long as it's all highway. Where it really nosedives is in the stop and go city driving. Worst I've ever gotten in 14 mpg. If I was to average over the 5 years I've had it I'd say I've probably averaged 17 mpg. But hey, you buy a heavy SUV with AWD and a powerful V8 you can't expect 30 mpg! I went in with my eyes open and haven't regretted it yet. As an aside I just bought my wife a 2008 EX35, loaded, AWD and we've been averaging 18-19 mpg on mid-grade. So a smaller car with less weight and a V6 isn't doing that much better than a V8. Maybe when the EX35 loosens up a bit mileage might improve. But again - you makes your choices and you pays the price.
#18 of 18 Re: Premium Unleaded? [texasfx35] by msticks Feb 20, 2009 (12:16 pm)
Replying to: texasfx35 (Dec 30, 2006 11:05 am) I agree with Texasfx35. I have an FX45 and I played the half a tank of 93 premium and half a tank of 89 midgrade and could see no real benefit. As he said a $100 a years isn't worth the potential problems. You buy a $60K car with a V8 you shouldn't have to worry about $100 a year. I use only premium and have put 77K miles on my FX-45 in the last 5 years and it still runs like new and will embarass the occasional kid at a stoplight in his Mustang GT! Now I will say that I just bought my wife a new EX35 for Christmas and we use mid-grade in it and it runs just fine. I think the VQ engine is a bit more forgiving. The owners manual suggests (rather than demands) premium but 89 mid-grade seems to work fine in the EX. The trip computer says she has averaged 20.9 mpg for the first 3000 miles. Now maybe if we had used premium it might ave broken 21mpg. Don't know. Two thing in play here - lighter car with 2 less cyclinders and she has a MUCH lighter foot than her hubby.

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