Just an FYI
Eagalicious
04-22-2006, 10:00 AM
I am not very experienced in the car mod area. I try to read alot (research) before I ask question, like I am asked to do before I pose a question. :grinyes:
I saw a post about tricks to increase mpg. Well this isn't a trick but I believe is good info. I was reading the FAQ and I found this. Now the "experienced" guys know this but us :newbie: 's don't.
This is from the FAQ
What gas mileage is normal?
My gas mileage stinks! Is there a fix?
My gas mileage was fine, but it's going down a lot! Is there a fix?
Search for this topic now!
Most owners get around 20 MPG (11.75 L/100km). On-highway use typically results in 25 MPG (9.5 L/100 km). These numbers vary a fair amount according to season, location, altitude, type of driving, state of modifications, age of various parts, and quality of gasoline used; non-turbo owners often have the edge here. Owners have reported 'normal' mileage on both new and used cars that vary from typical by as much as 10 MPG.
Mileage in the 12-13 MPG (18-20 L/100 km) sometimes reflects a problem with the car. An old or failing oxygen sensor is a prime suspect, as this component senses the air/fuel mixture and, when bad (or even weak), can cause the ECU to supply more fuel than is necessary. According to Todd Day of Technomotive, even a slightly weak O2 sensor can knock 1-2 MPG off of the normal mileage. Since weak or dead oxygen sensors often do not trip the "Check Engine" light (see here for why), owners may not realize their O2 sensor is on the blink.
However, this is not always the case. Mileage can often be lower in the winter simply because of the widespread sale of oxygenated gasoline, which tends to lower fuel mileage. Cold weather also leads to increased idling and more congested traffic.
Another common problem occurs when upgraded downpipes are installed. Techs often forget to re-connect the ground strap from the original downpipe, leading to a poor ground for the oxygen sensor that can have the car running rich.
If you're really desparate, try replacing your thermostat - a poorly operating unit can keep the car running so cold it never leaves it's 'warm-up' mode, during which the ECU runs the car richer than normal.
For some insight into how the EPA gets their mileage estimates, read Dean's Daily Discussions #9. Those interested can also read the rest of the series.
I found this interesting. I hope this helps the new guys because it will certainly help me when I do my exhaust upgrades.:evillol:
I am going to try and install me 3rd gen lifters today if the weather permits:evillol:
John
I saw a post about tricks to increase mpg. Well this isn't a trick but I believe is good info. I was reading the FAQ and I found this. Now the "experienced" guys know this but us :newbie: 's don't.
This is from the FAQ
What gas mileage is normal?
My gas mileage stinks! Is there a fix?
My gas mileage was fine, but it's going down a lot! Is there a fix?
Search for this topic now!
Most owners get around 20 MPG (11.75 L/100km). On-highway use typically results in 25 MPG (9.5 L/100 km). These numbers vary a fair amount according to season, location, altitude, type of driving, state of modifications, age of various parts, and quality of gasoline used; non-turbo owners often have the edge here. Owners have reported 'normal' mileage on both new and used cars that vary from typical by as much as 10 MPG.
Mileage in the 12-13 MPG (18-20 L/100 km) sometimes reflects a problem with the car. An old or failing oxygen sensor is a prime suspect, as this component senses the air/fuel mixture and, when bad (or even weak), can cause the ECU to supply more fuel than is necessary. According to Todd Day of Technomotive, even a slightly weak O2 sensor can knock 1-2 MPG off of the normal mileage. Since weak or dead oxygen sensors often do not trip the "Check Engine" light (see here for why), owners may not realize their O2 sensor is on the blink.
However, this is not always the case. Mileage can often be lower in the winter simply because of the widespread sale of oxygenated gasoline, which tends to lower fuel mileage. Cold weather also leads to increased idling and more congested traffic.
Another common problem occurs when upgraded downpipes are installed. Techs often forget to re-connect the ground strap from the original downpipe, leading to a poor ground for the oxygen sensor that can have the car running rich.
If you're really desparate, try replacing your thermostat - a poorly operating unit can keep the car running so cold it never leaves it's 'warm-up' mode, during which the ECU runs the car richer than normal.
For some insight into how the EPA gets their mileage estimates, read Dean's Daily Discussions #9. Those interested can also read the rest of the series.
I found this interesting. I hope this helps the new guys because it will certainly help me when I do my exhaust upgrades.:evillol:
I am going to try and install me 3rd gen lifters today if the weather permits:evillol:
John
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