Diminishing MPG's
#1
Diminishing MPG's
Hi guys,
another day another problem. been noticing im getting less and less miles out of my tank before the light comes on.
fill up 1 - 313 miles filled up 14.6 gal (when light comes on)
fill up 2 - 245 miles filled up 14.5 gal
Fill up 3 - 210 miles filled up 15 gal
driving style is consistent (pretty spirited), and i noticed my MPG fell after i changed the trans and diff fluid, which i cant imagine would affect the mpg that much, plus with the z-tube i should be able to pick up a mpg or 2...
car has new air filter, cleaned TB, fresh oil, new pcv valve, new trans fluid, diff fluid, z-tube
still on the list to change is spark plugs...
any advice is appreciated, would like to catch any potential problem is theres one
another day another problem. been noticing im getting less and less miles out of my tank before the light comes on.
fill up 1 - 313 miles filled up 14.6 gal (when light comes on)
fill up 2 - 245 miles filled up 14.5 gal
Fill up 3 - 210 miles filled up 15 gal
driving style is consistent (pretty spirited), and i noticed my MPG fell after i changed the trans and diff fluid, which i cant imagine would affect the mpg that much, plus with the z-tube i should be able to pick up a mpg or 2...
car has new air filter, cleaned TB, fresh oil, new pcv valve, new trans fluid, diff fluid, z-tube
still on the list to change is spark plugs...
any advice is appreciated, would like to catch any potential problem is theres one
#3
#4
Registered User
iTrader: (10)
Big6, the mileage we get depends on where we drive and under different conditions! Driving around town don't expect even good mileage, on roads where you can use your cruise control is where you'll do the best! I've never been a fan of driving until the light come on, anything below 1/2 tank I'm looking for a Chevron station. Having your G serviced won't effect your mileage in a negative way! About every second oil change I always drop in a bottle of Redline injector cleaner, AMSOIL also makes a great injector cleaner...either one will get the job done!
Gary
Gary
#5
Big6, the mileage we get depends on where we drive and under different conditions! Driving around town don't expect even good mileage, on roads where you can use your cruise control is where you'll do the best! I've never been a fan of driving until the light come on, anything below 1/2 tank I'm looking for a Chevron station. Having your G serviced won't effect your mileage in a negative way! About every second oil change I always drop in a bottle of Redline injector cleaner, AMSOIL also makes a great injector cleaner...either one will get the job done!
Gary
Gary
#6
Registered User
iTrader: (10)
Gary
#7
Trending Topics
#8
Registered User
iTrader: (10)
#9
That would come as soon as it fails completely. O2 sensors actually wear out progressively and one of the tell tale signs that it's on its way out is that your MPGs get cut by about half.
#10
I drove ttrank's car solo
iTrader: (50)
Join Date: Mar 2009
Location: By the sea, Tx
Posts: 18,301
Received 1,486 Likes
on
1,221 Posts
G35 sedan w/ too much money in mods
It's my experience people get varying results from different brands of gas. My G and my GTO for some reason prefer Valero over all others for mileage and performance and I've tried a lot of brands of gas over the years. Might be a regional thing.
#11
He also had a 2700lb 67 Dart swinger that ran 9.9 1/4 miles, so he new a thing or two. One of those older guys who keeps up on tech cuz he's been doing it that way all his life. I miss that guy. Haha
#12
Join Date: Mar 2011
Location: Central NJ
Posts: 2,605
Received 196 Likes
on
177 Posts
Front and rear cameras, tire pressure for all four tires can display on screen,folding side view mir
Hi guys,
another day another problem. been noticing im getting less and less miles out of my tank before the light comes on.
fill up 1 - 313 miles filled up 14.6 gal (when light comes on)
fill up 2 - 245 miles filled up 14.5 gal
Fill up 3 - 210 miles filled up 15 gal
driving style is consistent (pretty spirited), and i noticed my MPG fell after i changed the trans and diff fluid, which i cant imagine would affect the mpg that much, plus with the z-tube i should be able to pick up a mpg or 2...
car has new air filter, cleaned TB, fresh oil, new pcv valve, new trans fluid, diff fluid, z-tube
still on the list to change is spark plugs...
any advice is appreciated, would like to catch any potential problem is theres one
another day another problem. been noticing im getting less and less miles out of my tank before the light comes on.
fill up 1 - 313 miles filled up 14.6 gal (when light comes on)
fill up 2 - 245 miles filled up 14.5 gal
Fill up 3 - 210 miles filled up 15 gal
driving style is consistent (pretty spirited), and i noticed my MPG fell after i changed the trans and diff fluid, which i cant imagine would affect the mpg that much, plus with the z-tube i should be able to pick up a mpg or 2...
car has new air filter, cleaned TB, fresh oil, new pcv valve, new trans fluid, diff fluid, z-tube
still on the list to change is spark plugs...
any advice is appreciated, would like to catch any potential problem is theres one
Any junk in the trunk?
I'm sure if you fill your tank and drive 300 miles 65-70 MPH you will see much better results. I use WaWa gasoline and fill up before the light comes on usually at the 1/4 mark.
Telcoman
#13
Is your car a 6MT or auto and what year is it? What oil are you using in the motor?
Check your brakes to make sure there's no dragging and that your parking brake is completely disengaging. You could also have worn wheel bearings adding drag to your rolling efficiency. The front wheel bearings aren't known to be terribly durable on these cars.
Check your brakes to make sure there's no dragging and that your parking brake is completely disengaging. You could also have worn wheel bearings adding drag to your rolling efficiency. The front wheel bearings aren't known to be terribly durable on these cars.
#14
i'd think better airflow would help it run a litte more efficient but i get that its most likely not the solution or problem.. i am too starting to suspect the 02 sensors, gotta find my o2 sensor socket haha
#15
i'd guess its regional, some poeple swear by valero and delta, the worst gas in my experience was costco, my RX and my gf's ecoboost mustang saw a crazy drop in mileage and the car felt dull and sluggish