Bad Gas Mileage, Need Help

stang300a · November 7th, 2007, 12:00 AM

alright im getting around 15 mpg and that is bad. i was getting 17-18 a couple months ago. i changed my oil 2 weeks ago (which is fully syn), fuel filter was changed 10,000 miles ago, cleaned air filter 2 weeks ago, cleaned maf like 1 month ago, the iac was cleaned 2-3 months ago, i checked the air pressure in all the tire two weeks ago too. i dont kno what else to do to get better gas mileage. it seems like all of sudden my car started getting crappy gas mileage. any recommendations? btw the weather got cooler here so i should be getting even better gas mileage but thats not happening.

Onemanzu · November 7th, 2007, 12:02 AM

change your tune ?

seafoam in the gas tank?

nba1341 · November 7th, 2007, 12:09 AM

Originally Posted by Onemanzu

seafoam in the gas tank?

are you saying this is something he should do or its bad if he has left over seafoam in his gas tank?

bossman2kgt · November 7th, 2007, 12:11 AM

change your 02 sensors

Avaric3 · November 7th, 2007, 12:15 AM

02 sensors, or fuel filters, fuel injectors

is your cel light on?

stang300a · November 7th, 2007, 12:35 AM

no my cel is not on and u think my 02 senors are bad with only 53k miles.

Onemanzu · November 7th, 2007, 12:42 AM

its a number one suspect for poor gas milage... helped on my old fc3s ...

im saying put seafoam in the gas tank you would be amazed how much it can help after a simple stroll around the block

bossman2kgt · November 7th, 2007, 01:00 AM

Originally Posted by stang300a

no my cel is not on and u think my 02 senors are bad with only 53k miles.

Its just not as efficient.

stang300a · November 7th, 2007, 01:41 AM

Originally Posted by Onemanzu

its a number one suspect for poor gas milage... helped on my old fc3s ...

im saying put seafoam in the gas tank you would be amazed how much it can help after a simple stroll around the block

how do i do that? like how much do i put in there and how much gas should be in the tank and will it mess anything up?

nba1341 · November 7th, 2007, 01:50 AM

how much will sea foam help because i honestly went 100 miles on 9 gallons of gas which is bull shit

Onemanzu · November 7th, 2007, 01:54 AM

i put seafoam in about a week ago ... and im sitting at about 250 at a quarter tank left... its a little lower then normal but thats okay cause i also got so much increase in the smoothness of the engine... it accelerates and sounds better...

1 oz per gallon is the rule on that

nba1341 · November 7th, 2007, 01:56 AM

how much is it for a bottle and do they got it at pep boys? auto zone?

Onemanzu · November 7th, 2007, 02:00 AM

they should ... i know they have it at walmart and the tractor supply store... they should have it at a mainly auto part store...

i think its either 16 oz or 13 oz something weird

nba1341 · November 7th, 2007, 02:19 AM

is this what makes that white smoke come out in the exact or is that people pouring it in their oil?

Onemanzu · November 7th, 2007, 02:20 AM

the smoke is coming from the vacuum dealio... what happens there is the seafoam burning in the cylinder causes the seafoam to break up the carbon faster

stang300a · November 7th, 2007, 05:00 AM

alright well ill fill my tank tomorrow and put 15ozs of seafoam in there and let u guys kno in a couple days if my gas milage has gone up. btw right now im at 1/4 tanks left and i have gone <140miles. which is crappy compared to before.

stang300a · November 7th, 2007, 05:25 AM

actually i forgot to ask. should i do it when the gas is low in the tank or when its full??

Averlus · November 7th, 2007, 07:09 AM

I'm having a similiar problem, except my ride is brand new. I have about 1,200 miles on it. I'm wondering if maybe I'm driving in the wrong power-band. I usually try to keep it in the 1,500 RPM range, and I drive in 5th gear as much as possible. Which is sometimes when I'm doing maybe 45-50 mph.

Hourofpain · November 7th, 2007, 09:24 AM

decarbon yur intake and ijectors by running seafoam through your vac line.

replace the spark plugs.
clean your IAC
reset your adaptive memory
check your tire pressure

And get your codes read even if its something minor.

you dont always get a cel light

Onemanzu · November 7th, 2007, 12:26 PM

you can put the stuff in right before you fill it so that way it can mix if you want or w.e it doesn't matter as long as it goes in ...

new car dude... don't be in 5th if you accelerating ... its not very helpful... but cruising in 5th is just fine

November 7th, 2007, 12:00 AM	#1
stang300a Regular 2004 Mustang V6 Join Date: Jul 2007 Posts: 247 iTrader: 0 reviews	Bad Gas Mileage, Need Help alright im getting around 15 mpg and that is bad. i was getting 17-18 a couple months ago. i changed my oil 2 weeks ago (which is fully syn), fuel filter was changed 10,000 miles ago, cleaned air filter 2 weeks ago, cleaned maf like 1 month ago, the iac was cleaned 2-3 months ago, i checked the air pressure in all the tire two weeks ago too. i dont kno what else to do to get better gas mileage. it seems like all of sudden my car started getting crappy gas mileage. any recommendations? btw the weather got cooler here so i should be getting even better gas mileage but thats not happening. __________________ 2004 Mustang 3.9L V6 with K&N intake, Dual Flowmaster Super 40s, Motoblue 42% Pulley, GT rear sway bar, drilled and slotted rotors, SCT tuner, Black FR500's 17 by 10.5 and 17 by 9, 4.10 motive gears and FRPP T-Lock.

November 7th, 2007, 12:02 AM	#2
Onemanzu ¡ʇsnq ɹo uʍop ǝpısdn Join Date: Oct 2006 Location: Looking for free hand jobs in poland springs nebraska... silly gooses Posts: 12,514 Blog Entries: 1 iTrader: 0 reviews	change your tune ? seafoam in the gas tank? __________________ My Foz

November 7th, 2007, 12:15 AM	#5
Avaric3 Hardcore Enthusiast 2002 Ford Focus slow as fuck Join Date: Apr 2007 Location: M-Pan, NJ Posts: 2,561 iTrader: 4 reviews	02 sensors, or fuel filters, fuel injectors is your cel light on? __________________ 99 V6 Mustang-sold 02 Ford Focus-sold 98 Camaro Z/28-lid, catback

November 7th, 2007, 12:35 AM	#6
stang300a Regular 2004 Mustang V6 Join Date: Jul 2007 Posts: 247 iTrader: 0 reviews	no my cel is not on and u think my 02 senors are bad with only 53k miles. __________________ 2004 Mustang 3.9L V6 with K&N intake, Dual Flowmaster Super 40s, Motoblue 42% Pulley, GT rear sway bar, drilled and slotted rotors, SCT tuner, Black FR500's 17 by 10.5 and 17 by 9, 4.10 motive gears and FRPP T-Lock.

November 7th, 2007, 12:42 AM	#7
Onemanzu ¡ʇsnq ɹo uʍop ǝpısdn Join Date: Oct 2006 Location: Looking for free hand jobs in poland springs nebraska... silly gooses Posts: 12,514 Blog Entries: 1 iTrader: 0 reviews	its a number one suspect for poor gas milage... helped on my old fc3s ... im saying put seafoam in the gas tank you would be amazed how much it can help after a simple stroll around the block __________________ My Foz

November 7th, 2007, 12:11 AM	#4
bossman2kgt Hardcore Enthusiast Join Date: May 2007 Location: Wichita, Ks Posts: 1,287 iTrader: 0 reviews	change your 02 sensors

November 7th, 2007, 01:50 AM	#10
nba1341 Banned 1965 Mustang Fastback Join Date: Apr 2007 Location: Los Angeles, Cal Posts: 24,982 Posts: 2,197 iTrader: 0 reviews	how much will sea foam help because i honestly went 100 miles on 9 gallons of gas which is bull shit __________________ I'm a good boy now. [COLOR=red][B]slow car club - crew member 7 of 9 [COLOR=White]Mood: Cool :cool: [/COLOR][/B] [/COLOR]

November 7th, 2007, 01:54 AM	#11
Onemanzu ¡ʇsnq ɹo uʍop ǝpısdn Join Date: Oct 2006 Location: Looking for free hand jobs in poland springs nebraska... silly gooses Posts: 12,514 Blog Entries: 1 iTrader: 0 reviews	i put seafoam in about a week ago ... and im sitting at about 250 at a quarter tank left... its a little lower then normal but thats okay cause i also got so much increase in the smoothness of the engine... it accelerates and sounds better... 1 oz per gallon is the rule on that __________________ My Foz

November 7th, 2007, 01:56 AM	#12
nba1341 Banned 1965 Mustang Fastback Join Date: Apr 2007 Location: Los Angeles, Cal Posts: 24,982 Posts: 2,197 iTrader: 0 reviews	how much is it for a bottle and do they got it at pep boys? auto zone? __________________ I'm a good boy now. [COLOR=red][B]slow car club - crew member 7 of 9 [COLOR=White]Mood: Cool :cool: [/COLOR][/B] [/COLOR]

November 7th, 2007, 02:00 AM	#13
Onemanzu ¡ʇsnq ɹo uʍop ǝpısdn Join Date: Oct 2006 Location: Looking for free hand jobs in poland springs nebraska... silly gooses Posts: 12,514 Blog Entries: 1 iTrader: 0 reviews	they should ... i know they have it at walmart and the tractor supply store... they should have it at a mainly auto part store... i think its either 16 oz or 13 oz something weird __________________ My Foz

November 7th, 2007, 02:19 AM	#14
nba1341 Banned 1965 Mustang Fastback Join Date: Apr 2007 Location: Los Angeles, Cal Posts: 24,982 Posts: 2,197 iTrader: 0 reviews	is this what makes that white smoke come out in the exact or is that people pouring it in their oil? __________________ I'm a good boy now. [COLOR=red][B]slow car club - crew member 7 of 9 [COLOR=White]Mood: Cool :cool: [/COLOR][/B] [/COLOR]

November 7th, 2007, 02:20 AM	#15
Onemanzu ¡ʇsnq ɹo uʍop ǝpısdn Join Date: Oct 2006 Location: Looking for free hand jobs in poland springs nebraska... silly gooses Posts: 12,514 Blog Entries: 1 iTrader: 0 reviews	the smoke is coming from the vacuum dealio... what happens there is the seafoam burning in the cylinder causes the seafoam to break up the carbon faster __________________ My Foz

November 7th, 2007, 05:00 AM	#16
stang300a Regular 2004 Mustang V6 Join Date: Jul 2007 Posts: 247 iTrader: 0 reviews	alright well ill fill my tank tomorrow and put 15ozs of seafoam in there and let u guys kno in a couple days if my gas milage has gone up. btw right now im at 1/4 tanks left and i have gone <140miles. which is crappy compared to before. __________________ 2004 Mustang 3.9L V6 with K&N intake, Dual Flowmaster Super 40s, Motoblue 42% Pulley, GT rear sway bar, drilled and slotted rotors, SCT tuner, Black FR500's 17 by 10.5 and 17 by 9, 4.10 motive gears and FRPP T-Lock.

November 7th, 2007, 05:25 AM	#17
stang300a Regular 2004 Mustang V6 Join Date: Jul 2007 Posts: 247 iTrader: 0 reviews	actually i forgot to ask. should i do it when the gas is low in the tank or when its full?? __________________ 2004 Mustang 3.9L V6 with K&N intake, Dual Flowmaster Super 40s, Motoblue 42% Pulley, GT rear sway bar, drilled and slotted rotors, SCT tuner, Black FR500's 17 by 10.5 and 17 by 9, 4.10 motive gears and FRPP T-Lock.

November 7th, 2007, 07:09 AM	#18
Averlus Regular 2006 Grand Prix GXP 0.0@000.00 Join Date: Nov 2007 Location: Fort Riley, KS Posts: 462 iTrader: 0 reviews	I'm having a similiar problem, except my ride is brand new. I have about 1,200 miles on it. I'm wondering if maybe I'm driving in the wrong power-band. I usually try to keep it in the 1,500 RPM range, and I drive in 5th gear as much as possible. Which is sometimes when I'm doing maybe 45-50 mph.

November 7th, 2007, 09:24 AM	#19
Hourofpain Hardcore Enthusiast 2005 Torrid Red GTO m6 Join Date: Mar 2007 Location: Virginia Beach Posts: 1,526 iTrader: 0 reviews	decarbon yur intake and ijectors by running seafoam through your vac line. replace the spark plugs. clean your IAC reset your adaptive memory check your tire pressure And get your codes read even if its something minor. you dont always get a cel light __________________ 1996 Cobra To be sold... 2005 M6 Twin Turbo GTO Torrid Red Fully Forged LS2 Block Built to handle 1000RWHP. Fully ported Dart Heads. Edelbrock Jr Intake. Custom cut upper intake plenum. APS twin Turbo System with APS twin Fuel pumps.

November 7th, 2007, 12:26 PM	#20
Onemanzu ¡ʇsnq ɹo uʍop ǝpısdn Join Date: Oct 2006 Location: Looking for free hand jobs in poland springs nebraska... silly gooses Posts: 12,514 Blog Entries: 1 iTrader: 0 reviews	you can put the stuff in right before you fill it so that way it can mix if you want or w.e it doesn't matter as long as it goes in ... new car dude... don't be in 5th if you accelerating ... its not very helpful... but cruising in 5th is just fine __________________ My Foz

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