Go Back   EcoModder Forum > Introductions
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-01-2009, 05:13 PM   #1 (permalink)
Master EcoModder
 
mcrews's Avatar
 
Join Date: Oct 2009
Location: Texas
Posts: 3,523

The Q Sold - '02 Infiniti Q45 Sport
90 day: 23.08 mpg (US)

blackie - '14 nissan altima sv
Thanks: 2,203
Thanked 658 Times in 474 Posts
n. California and a 02 Infiniti Q45

I'm Mark and I currently drive an 2002 INFINITI Q45 Sport.
I bought it w/40k in 05 and today it has 183,000 miles on it. I drive alot (40k a year) and at least 60% of that is freeway. THe Q comes with an info screen as part of the package. MPG and tire preesure are some of the readouts.

I have always been interested in mpg.

My first car in 75 when I left for college, was a 66 mustang - with the 200ci straight 6, auto tran and a 2.87 rear end ratio!!!! Since I wasnt going to be "burning rubber" with that setup , I got interested in mpg.
In 1977, I actually bought an aftermarket "scan gauge' thingie and installed it inthe console. I ran headers and a slightly 'taller' tire and got 27 mpg on the road all day long.

fastforward 30 years......

My current car, THE Q, lists epa at 16/23. I currently get 25.5+ on most road trips. I got 27mpg avging 70.3 mph, from sacramento ca to salt lake city a yr ago.

I have done the following:
1.) run 255/45/18 instead of the stock 245/45/18. it's 3.4% diameter more, thus lowering the rpm at speed. I also run 44 psi when on the road. (part of the Q's information system is a read out of tire presure) If I'm staying in town I drop it to 38 for comfort.
2.) Removed rear suitcase muffler. (probably wieghed 25Lbs!) install short light glasspacks. there are 2 mid mufflers already so the sound change is minimual.
3.) Installed x-cross pipe in middle of exhaust system where two pipes from the cats went into one. then went back out to two!
4.) change oil & fiter every 4k miles and airpreesure clean the air filter everyweek.
5.) built custom lower air duct that feeds into stock air box.
6.) I installed a IMPUL FULL BODY kit. lowered the body lines 2 inches all around the car. Did not nessecarily do this for mpg...I just REALLY liked the look!(.... )
5.) DRIVING STYLE: this car weighs 3801lbs, has 340hp V8 and is capable of 0-60 in 5.9. It can also keep pulling past 129mph.
BUT.......It also has a sweet spot in the tourgue curve that allows it to get pretty good mpg when driven with a sense of awareness. I actually am already doing some of the driving techniques the this site and others recomend.
My last trip to texas (1700 miles 2 1/2 days ) I averaged 25.8 mpg at 70.2 mph.
Also, I alwys run the a/c. I ran an A-B-A test with windows down and lost 4mpg.

I am very active on 2 different Q45 sites. THere are hardly any aftermarket bolt on preformace parts for the 4.5liter V8. In fact, everyone who even tried CAI always went back to stock because performance suffered. THis particular engine really has been tweaked to its best from the factory. Also, the electronic control modual for the engine 'adjusts' itself and the trans ecm 'learns' your drining style. I credit the trans ecm for part of my good mpg scores

I am VERY interested in getting to the next level. (30 + mpg) THe underbelly pan and the grille block specificly are of interest to me.

I am very impressed the level of knowledge and conversation that I have seen so far.

2002 Infiniti Q45 Sport w/IMPUL body kit:



removed rear muffller:


RIght lower air duct:


coming into hole in bottom of factory airbox:


information screen:

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-01-2009, 07:21 PM   #2 (permalink)
Pishtaco
 
SentraSE-R's Avatar
 
Join Date: Jun 2009
Location: Bay Area, California
Posts: 1,485

Mean Green Toaster Machine - '06 Scion xB
Team Toyota
90 day: 48.92 mpg (US)
Thanks: 56
Thanked 284 Times in 181 Posts
Welcome, from another northern Californian. You have a sweet ride.

I beat my SE-R's 22 mpg and my Scion's 28 mpg combined mileages by going slower. 70 mph = 26 mpg in the SE-R. 62 mph = 32-34 mpg, and 55 mph = 36-38 mpg.
__________________
Darrell

Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
  Reply With Quote
Old 11-01-2009, 07:56 PM   #3 (permalink)
Master EcoModder
 
mcrews's Avatar
 
Join Date: Oct 2009
Location: Texas
Posts: 3,523

The Q Sold - '02 Infiniti Q45 Sport
90 day: 23.08 mpg (US)

blackie - '14 nissan altima sv
Thanks: 2,203
Thanked 658 Times in 474 Posts
Quote:
Originally Posted by SentraSE-R View Post
Welcome, from another northern Californian. You have a sweet ride.

I beat my SE-R's 22 mpg and my Scion's 28 mpg combined mileages by going slower. 70 mph = 26 mpg in the SE-R. 62 mph = 32-34 mpg, and 55 mph = 36-38 mpg.
Thanks for the props!
I know, I drove 58mph between vacaville and fairfield once (in the midmorning- no traffic) I was amazed at the improvement in mileage!!!!!

I tend to look a the whole mileage thing very practically. If I can get 25mpg in an "army tank" and average 65-70 mph......I am a very HAPPY camper.

But this site is definately making me retink some things...
  Reply With Quote
Old 11-01-2009, 09:31 PM   #4 (permalink)
Pishtaco
 
SentraSE-R's Avatar
 
Join Date: Jun 2009
Location: Bay Area, California
Posts: 1,485

Mean Green Toaster Machine - '06 Scion xB
Team Toyota
90 day: 48.92 mpg (US)
Thanks: 56
Thanked 284 Times in 181 Posts
Mark,

I make an 800 mile round-trip to SoCal to visit my mom several times/year. I started driving slower after realizing my SE-R, wife's Elantra, and stepdaughter's Elantra were all giving me only mid-20s mileage on that trip.

A couple of years ago, I retired, and started driving to Bryce Canyon NP in Utah annually. I decided to try getting 40 mpg over the 1400+ miles. Now it's a real-life video game. I got 51.5 mpg in my Scion over 1213 miles driving back to the Bay Area from Gallup, NM this past Summer.
__________________
Darrell

Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
  Reply With Quote
Old 11-01-2009, 10:02 PM   #5 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,122

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.67 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 73.57 mpg (US)
Thanks: 2,906
Thanked 5,763 Times in 2,980 Posts
Welcome to the site, Mark.

Quote:
Originally Posted by mcrews View Post
6.) I installed a IMPUL FULL BODY kit. lowered the body lines 2 inches all around the car. Did not nessecarily do this for mpg...I just REALLY liked the look!
I'd be willing to bet that 2 inches lower in the front more than likely helped with MPG. Looks nice.

Quote:
I ran an A-B-A test with windows down and lost 4mpg.
I'd be interested to know the details of the test. (Feel free to start a new thread.)

cheers
Darin

__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com