So i have a 2004 Infinti G35x. I have had some bad fuel mileage after I put some 87 octane in at a 7/11 because they were out of 93, and 89. I have put a few tanks of 93 in and run them down but still get 20mpg highway. Before i put the 87 in I was getting like 24. Any advice on how to revert this.
Thanks
G35 Poor Mileage after 87 use, put 93 back in.
-
undertone247
- Posts: 21
- Joined: Thu Dec 21, 2006 9:10 pm
- Car: 2004 Infiniti G35x (VQ35DE)
1994 Nissan Altima GXE (KA24DE)
-
telcoman
- Posts: 5762
- Joined: Sat Jul 08, 2006 11:30 am
- Car: Tesla 2022 Model Y, 2016 Q70 Bye 2012 G37S 6 MT w Nav 94444 mi bye 2006 Infiniti G35 Sedan 6 MT @171796 mi.
- Location: Central NJ
Re: G35 Poor Mileage after 87 use, put 93 back in.
Perhaps its time to trade up to a 2012undertone247 wrote:So i have a 2004 Infinti G35x. I have had some bad fuel mileage after I put some 87 octane in at a 7/11 because they were out of 93, and 89. I have put a few tanks of 93 in and run them down but still get 20mpg highway. Before i put the 87 in I was getting like 24. Any advice on how to revert this.
Thanks
Telcoman
Re: G35 Poor Mileage after 87 use, put 93 back in.
I would disconnect the battery to reset the ECU. This should force the car to "relearn"...
Unless you do all highway, don't expect to get that high for MPGs. I had a 2009 G37 and got around 20.
Unless you do all highway, don't expect to get that high for MPGs. I had a 2009 G37 and got around 20.
-
yourinfinitiguy
- Posts: 5
- Joined: Mon Nov 12, 2012 8:56 am
- Location: Westborough, MA
- Contact:
Re: G35 Poor Mileage after 87 use, put 93 back in.
You may need a tune up, a lot of things can contribute to a decline in gas mileage. These are Nissan engines, you don't need to put 93 in them. The premium fuel will provide little no difference in performance or mileage. Just a difference in fuel cost.
Re: G35 Poor Mileage after 87 use, put 93 back in.
For the models that have the premium fuel requirement, the ECU will adjust for lower octane...you will have less HP. Agree with you on the tune up.yourinfinitiguy wrote:You may need a tune up, a lot of things can contribute to a decline in gas mileage. These are Nissan engines, you don't need to put 93 in them. The premium fuel will provide little no difference in performance or mileage. Just a difference in fuel cost.
-
telcoman
- Posts: 5762
- Joined: Sat Jul 08, 2006 11:30 am
- Car: Tesla 2022 Model Y, 2016 Q70 Bye 2012 G37S 6 MT w Nav 94444 mi bye 2006 Infiniti G35 Sedan 6 MT @171796 mi.
- Location: Central NJ
Re: G35 Poor Mileage after 87 use, put 93 back in.
No mention on how often the air filter gets changed
On my 06 I had very dirty ones after 10k miles
Telcoman
On my 06 I had very dirty ones after 10k miles
Telcoman
-
kmckis1029
- Posts: 1768
- Joined: Wed Aug 13, 2008 8:45 am
- Car: 2016 Q50 RS400 AWD
2010 G37x w/Prem, Nav, & Wood (sold)
2005 G35x w/Prem C (traded in) - Location: Centerville, GA
- Contact:
Re: G35 Poor Mileage after 87 use, put 93 back in.
+1
if you over 80k miles... might be time for spark plugs if you havent already. I agree yank the battery for a couple minutes and let the engine relearn 93 gas and dont forget about that air filter.
On my G37 i get high teens in the city and high 20s on the highway in MPG. So please only expect decent MPG with a G, its a sports car.
if you over 80k miles... might be time for spark plugs if you havent already. I agree yank the battery for a couple minutes and let the engine relearn 93 gas and dont forget about that air filter.
On my G37 i get high teens in the city and high 20s on the highway in MPG. So please only expect decent MPG with a G, its a sports car.