gas milage help
01-20-2006, 09:08 AM
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gas mileage help ok guys i need your help i have a 99 ta and im only getting 17 miles to a gallon and lucky if i get 300 to a tank this week ill be lucky if i get 220 on this tank, i use nothing but 93 octane what could be causing my milage to be so low my car is all stock other than a few mods that shouldnt effect the milage the air filter is clean the oil is changed but still the same please help me out here and dont be afraid to talk to me like dumb *** cause i dont know much bout cars.... i read on the net that they should average bout 22/24 miles a gallon .... 
Last edited by y2k_ta; 01-27-2006 at 07:45 PM.
01-20-2006, 09:54 AM
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The obvious things need to be checked: tire pressure, clean air filter, fuel filter, and most of all... keep the rpms very low. Drive like a granny and you'll get granny gas mileage.
Plus you can actually run 87 octane if you want to. If the ecu senses detonation it pulls a bit of timing, so you might lose 5-9 horsepower, but who cares you want mileage right?
Plus you can actually run 87 octane if you want to. If the ecu senses detonation it pulls a bit of timing, so you might lose 5-9 horsepower, but who cares you want mileage right?
01-20-2006, 11:55 AM
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If you have a slushbox dont expect to get the mpg that M6's get, they just are not efficent altho lock up converters on the new cars help. I get 14mpg in the city if im easy on it, but i wouldnt trade my 4.10s for better mpg
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01-22-2006, 10:42 PM
#10
the colder it gets the worse your mileage will be too..so this time of year is no good for mileage,
might try resetting your pcm by unplugging the battery for 20 min or so.
Might want to get your alignment checked out too, that can affect mpg.
might try resetting your pcm by unplugging the battery for 20 min or so.
Might want to get your alignment checked out too, that can affect mpg.
01-23-2006, 06:54 PM
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I have a 2000 TA and usually get around 19.5 MPG on average (I check it every tank of gas). Don't run 87 'cuse it will knock like hell. When I drive like a granny (like some in this post suggest) I can get 21-22MPG, but that doesn't happen often. If you're really concerned about it, make sure that all the usualt stuff is up to snuff, then get it looked at. Sometimes it's just being a lead foot. Sometimes it might be a real problem. Track how you drive it and see if you're not lead-footing it a bit too much.
01-27-2006, 06:44 PM
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My stock 2002 WS6 M6 Gas Mileage My best gas mileage ever is 29 MPG on a highway trip. On my 2001 WS6 with my wife driving, she once got 32 mpg, but she never goes over 65 and is a demon at the cruise control game.
On my mixed city/highway drive to work (14 miles daily), I usually get 18 if I drive normally 80% / drive it like I stole it 20%. If I really take it easy, I can get 20-22 mpg in my daily drive...but ... so... much ... power... right... foot ... soooo ...Heavy....
I have found that it is usually better to shift from 1-3-5 for city driving (this prevents it from bogging) and I try to keep it under 1600-1800 at the shift point. As always, on the highway, if you go over 60, you will see an exponential decrease in fuel mileage.
Remember, at high speeds, Aerodynamic drag plays a big role in the power required to move the vehicle. HP loss to A drag = drag coefficient * Frontal area * (Velocity)^3/ 150,000.
The Frontal area of a 2002 WS6 is listed as 0.34 in some forums with a Frontal area of I think like 44 sq feet ( I left my spreadsheet with this stuff at work, I will update next week). and the HP required to go from 50 mph to 70 mph is 12.5 hp at 50, 34.2 at 70.
I have also noticed some factory tunes can be extremely rich...you might look at a retune.
Good luck.
On my mixed city/highway drive to work (14 miles daily), I usually get 18 if I drive normally 80% / drive it like I stole it 20%. If I really take it easy, I can get 20-22 mpg in my daily drive...but ... so... much ... power... right... foot ... soooo ...Heavy....
I have found that it is usually better to shift from 1-3-5 for city driving (this prevents it from bogging) and I try to keep it under 1600-1800 at the shift point. As always, on the highway, if you go over 60, you will see an exponential decrease in fuel mileage.
Remember, at high speeds, Aerodynamic drag plays a big role in the power required to move the vehicle. HP loss to A drag = drag coefficient * Frontal area * (Velocity)^3/ 150,000.
The Frontal area of a 2002 WS6 is listed as 0.34 in some forums with a Frontal area of I think like 44 sq feet ( I left my spreadsheet with this stuff at work, I will update next week). and the HP required to go from 50 mph to 70 mph is 12.5 hp at 50, 34.2 at 70.
I have also noticed some factory tunes can be extremely rich...you might look at a retune.
Good luck.
