Why Gas Mileage is SO bad?
01-16-13, 06:06 AM
#31
Lexus Test Driver
GaryZhao, I notice you are in Ontario (Canada).
What are you getting in metric ( Liters / 100 km)?
I have a 97 ES300.
In the summer, I get about 8-10 L / 100 km combined city / hwy.
In the winter, I get about 10-11L / 100 km combined.
My dad has a 2006 ES330.
He gets around the same.
What are you getting in metric ( Liters / 100 km)?
I have a 97 ES300.
In the summer, I get about 8-10 L / 100 km combined city / hwy.
In the winter, I get about 10-11L / 100 km combined.
My dad has a 2006 ES330.
He gets around the same.
01-16-13, 06:12 AM
#32
Lexus Test Driver
GaryZhao, I notice you are in Ontario (Canada).
What are you getting in metric ( Liters / 100 km)?
I have a 97 ES300.
In the summer, I get about 8-10 L / 100 km combined city / hwy.
In the winter, I get about 10-11L / 100 km combined.
My dad has a 2006 ES330.
He gets around the same.
What are you getting in metric ( Liters / 100 km)?
I have a 97 ES300.
In the summer, I get about 8-10 L / 100 km combined city / hwy.
In the winter, I get about 10-11L / 100 km combined.
My dad has a 2006 ES330.
He gets around the same.
01-21-13, 04:50 AM
#33
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come on folks 10-12mpg is not normal at all.
V8 Gelenvagen gets better mpgs and thats an all terrain vehicle lol.
anyway, it sounds like you are running rich air fuel mix. Air fuel sensor controls the mix ratio and it is getting information from oxygen sensor after the cat converter. If one of them or both are not working properly then you get messed up air / fuel ratio, in your case too much gas hence gas smell hence low mpg.
How many miles on your car? If you are over 100K on all original sensors i'd test and replace them if needed.
V8 Gelenvagen gets better mpgs and thats an all terrain vehicle lol.
anyway, it sounds like you are running rich air fuel mix. Air fuel sensor controls the mix ratio and it is getting information from oxygen sensor after the cat converter. If one of them or both are not working properly then you get messed up air / fuel ratio, in your case too much gas hence gas smell hence low mpg.
How many miles on your car? If you are over 100K on all original sensors i'd test and replace them if needed.
Air fuel sensor is MAF sensor?
Gary
01-21-13, 04:56 AM
#34
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GaryZhao, I notice you are in Ontario (Canada).
What are you getting in metric ( Liters / 100 km)?
I have a 97 ES300.
In the summer, I get about 8-10 L / 100 km combined city / hwy.
In the winter, I get about 10-11L / 100 km combined.
My dad has a 2006 ES330.
He gets around the same.
What are you getting in metric ( Liters / 100 km)?
I have a 97 ES300.
In the summer, I get about 8-10 L / 100 km combined city / hwy.
In the winter, I get about 10-11L / 100 km combined.
My dad has a 2006 ES330.
He gets around the same.
To convert it to km, would be - 17 to 18 litres per 100 km.
it's really bad, i do believe something wrong with my car.
01-21-13, 08:04 PM
#35
no. air fuel sensors control air fuel mix ratio, they are located before catalytic converter. MAF - controls air flow, its located in your air box. Dont touch MAF, unless you get engine code that tells you MAF is bad.
Download factory service manual for your car model there is a testing procedure there for air fuel and oxygen sensors, you'll need some basic physics knowledge and voltmeter to test your oxygen and air fuel sensors BEFORE ordering replacement sensors, otherwise you are running a chance of replacing perfectly good sensors and still not resolving low mpg issue.
Download factory service manual for your car model there is a testing procedure there for air fuel and oxygen sensors, you'll need some basic physics knowledge and voltmeter to test your oxygen and air fuel sensors BEFORE ordering replacement sensors, otherwise you are running a chance of replacing perfectly good sensors and still not resolving low mpg issue.
01-22-13, 07:21 AM
#36
It's a bad mileage, but not necessarily because there's something wrong with your ES. If you're getting such numbers while driving in the city, with lots of traffic jams, stops and goes, short rides, engine temp increasing and decreasing several times a day, A/C on full time, well, I'd say that even 20 l/100 km is acceptable.
01-22-13, 09:30 AM
#37
Lexus Test Driver
Why are you converting to km? I thought you are in Ontario (Canada) and our cars are already in metrics (km). Unless you have an USA car imported into Canada.
01-28-13, 06:06 AM
#38
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01-28-13, 06:07 AM
#39
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no. air fuel sensors control air fuel mix ratio, they are located before catalytic converter. MAF - controls air flow, its located in your air box. Dont touch MAF, unless you get engine code that tells you MAF is bad.
Download factory service manual for your car model there is a testing procedure there for air fuel and oxygen sensors, you'll need some basic physics knowledge and voltmeter to test your oxygen and air fuel sensors BEFORE ordering replacement sensors, otherwise you are running a chance of replacing perfectly good sensors and still not resolving low mpg issue.
Download factory service manual for your car model there is a testing procedure there for air fuel and oxygen sensors, you'll need some basic physics knowledge and voltmeter to test your oxygen and air fuel sensors BEFORE ordering replacement sensors, otherwise you are running a chance of replacing perfectly good sensors and still not resolving low mpg issue.
Gary
01-28-13, 06:13 AM
#40
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It's a bad mileage, but not necessarily because there's something wrong with your ES. If you're getting such numbers while driving in the city, with lots of traffic jams, stops and goes, short rides, engine temp increasing and decreasing several times a day, A/C on full time, well, I'd say that even 20 l/100 km is acceptable.
Gary
01-28-13, 09:29 AM
#41
Lexus Test Driver
Hey Gary, I am in Toronto.
During the winter, I notice my fuel economy drops quite a bit....especially if I drive a lot on the city streets.
When I filled up last night, I only traveled 380 km and put in 48 L of gas. That is almost 13L/100km or 18mpg.
In the summer and on mostly highway, I get 8L/100km or 29mpg.
During the winter, I notice my fuel economy drops quite a bit....especially if I drive a lot on the city streets.
When I filled up last night, I only traveled 380 km and put in 48 L of gas. That is almost 13L/100km or 18mpg.
In the summer and on mostly highway, I get 8L/100km or 29mpg.
01-28-13, 09:31 AM
#42
Lexus Test Driver
And FYI, I don't idle to warm up the engine.
I start the car, wait 5 seconds, and then drive away slowly.
If you idle to warm up the engine, expect worst fuel economy....
I start the car, wait 5 seconds, and then drive away slowly.
If you idle to warm up the engine, expect worst fuel economy....
01-28-13, 09:35 AM
#43
Lexus Test Driver
Also, check if your brakes are seized...or air in the brake line.
Dragging brakes can also affect your fuel economy.
Is there check engine light? Maybe the CEL light bulb burnt out and you don't know if there is a CEL.
Are the fuel injectors stuck open? Try running seafoam or other fuel injector cleaners.
Are the oxygen sensors working?
Are the spark plugs good?
Are the tires the right size? Are they inflated as per the sticker?
Does your wife, girlfriend, mistress, kid, housemate, etc take it out for a ride without you knowing?
There are so many factors that can impact it....
Dragging brakes can also affect your fuel economy.
Is there check engine light? Maybe the CEL light bulb burnt out and you don't know if there is a CEL.
Are the fuel injectors stuck open? Try running seafoam or other fuel injector cleaners.
Are the oxygen sensors working?
Are the spark plugs good?
Are the tires the right size? Are they inflated as per the sticker?
Does your wife, girlfriend, mistress, kid, housemate, etc take it out for a ride without you knowing?
There are so many factors that can impact it....
Last edited by BDSL; 01-28-13 at 09:38 AM. Reason: Additional Info
01-29-13, 10:55 AM
#44
My es300 is rated 19mpg city and 27mpg highway. It is normal for mpg to drop in the winter, just the way it is. 18-19 in stop and go in snow is all you should expect anything higher is a bonus IMO. Mixed/highway driving should bump your mpg into the 20's. Summer/highway is when i can actually reach and even exceed a little factory mpg rating.
02-04-13, 06:17 AM
#45
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The thing is. based on your hiway mileage, which appears to be 26-27 mpg based on your reporting that you are getting 400+ miles from a tank on the hiway, there just doesn't seem to be anything seriously amiss with your engine once it reaches operating termperature. If you had a major problem with the engine, you'd expect that it would get lousy mileage on the hiway too. 26-27 is dead normal for these things, so you can pretty much rule out bad compression or slipped timing, which would cause bad mpg all the time. You're not throwing any error codes, so the engine computer is not detecting any problems. So, either you're spending an inordinate amount of time with the engine running but not moving, you make a lot of short trips where the engine never warms up fully, or something is keeping your engine from warming up quickly so it's running richer than normal.