Something is seriously wrong with my mpg.
#18
Change spark plugs
Change fluids (Look into fuel efficient fluids such as 0w30 motor oil)
Tire pressure
Intake filter
Stuff like that
Also keeping your engine clean helps too. Look into Seafoam.
Change fluids (Look into fuel efficient fluids such as 0w30 motor oil)
Tire pressure
Intake filter
Stuff like that
Also keeping your engine clean helps too. Look into Seafoam.
Last edited by JOKER; 12-29-2011 at 10:58 AM.
#20
that's highway miles, that don't count. I was constantly getting 25mpg on my 3k mile trip from WA to FL couple years ago. In a city tho I barely get 21
#21
#22
I did my differential oil today along with cleaning my K&N filter with no improvement, iim still averaging like 11mpg ![52](https://g35driver.com/forums/images/smilies/52.gif)
I think i might run some seafoam through it and see what it does, also do i have to use iridium plugs in the g35? i have some basic ngks that the ngk website recommended, I will probably clean the throttle body tomorrow and see what it does, but all together, driving this thing is getting alot more expensive really quick!
![52](https://g35driver.com/forums/images/smilies/52.gif)
I think i might run some seafoam through it and see what it does, also do i have to use iridium plugs in the g35? i have some basic ngks that the ngk website recommended, I will probably clean the throttle body tomorrow and see what it does, but all together, driving this thing is getting alot more expensive really quick!
#25
Plugs make alot of difference in my mpg, changing the differential oil also made a big difference on performance, i can chirp with my 5at with vdc off now. also, when i was changing my plugs i threw some marvel mystery oil in each cylinder and let it sit overnight. when i threw the plugs in and cranked it in the morning, a whole bunch of white smoke came out, but it idles at like 100rpm less than before, and runs amazing, Im yet to test my mpg for sure, but im pretty sure its much better.
#28
Plugs make alot of difference in my mpg, changing the differential oil also made a big difference on performance, i can chirp with my 5at with vdc off now. also, when i was changing my plugs i threw some marvel mystery oil in each cylinder and let it sit overnight. when i threw the plugs in and cranked it in the morning, a whole bunch of white smoke came out, but it idles at like 100rpm less than before, and runs amazing, Im yet to test my mpg for sure, but im pretty sure its much better.
#29
Have you actually calculated your miles based on your total miles and how many gallons you're putting in? Everyone is suggesting things to help improve mileage that usually have a marginal effect. Poor maintenance shouldn't cut your mileage nearly in half without at least a check engine light. You would be pouring tons of smoke or driving like you're on a track constantly. Even when I drove my car hard I got 15mpg city with my overall avg at 18.4mpg.
There is an issue with some cars where the tank actually doesn't fill all the way. Mine occasionally will only fill half the tank and the pump refuses to pump any more as well as the light coming on when there is still 5-6 gal left in the tank, but it hasn't been a terrible hassle as it comes and goes. I don't know how relevant that info is if you have calculated your mpg. Sites like gasbuddy.com have a fuel logbook to track over time.
There is an issue with some cars where the tank actually doesn't fill all the way. Mine occasionally will only fill half the tank and the pump refuses to pump any more as well as the light coming on when there is still 5-6 gal left in the tank, but it hasn't been a terrible hassle as it comes and goes. I don't know how relevant that info is if you have calculated your mpg. Sites like gasbuddy.com have a fuel logbook to track over time.