(CDN) Mileage Very Poor.
03-14-16, 10:46 AM
#1
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(CDN) Mileage Very Poor.
LONG STORY SHORT,
I use to have an INTAKE for my car, I reverted back to stock intake.
My mileage went from 460/km per 60L tank to ..
340/km per 60L
360/km per 60L
After 3 fill-ups I am now getting 400/km.. But barley close ..
My meters say weird things on idle and jump from 30/L per 100km tank..
The numbers in the photos attached will change as well and just keep increasing.
Its really starting to bother me I dont know much about cars so any information you guys have is greatly appreciated
I use to have an INTAKE for my car, I reverted back to stock intake.
My mileage went from 460/km per 60L tank to ..
340/km per 60L
360/km per 60L
After 3 fill-ups I am now getting 400/km.. But barley close ..
My meters say weird things on idle and jump from 30/L per 100km tank..
The numbers in the photos attached will change as well and just keep increasing.
Its really starting to bother me I dont know much about cars so any information you guys have is greatly appreciated
03-14-16, 11:39 AM
#2
What year is the car? Why did you take the intake out? Is that city driving or highway? Are there any engine codes?
Previously in my IS250 6MT I would get around 420-450km in the city for about 60L, which isn't that great either, but my 6MT is rated for worse mileage (just barely) than the AWD IS250 6AT. I've always run a stock intake and I don't hold back on the throttle.
Something seems up with your car, though I'm not entirely sure the intake would be to blame.
Jeff
Previously in my IS250 6MT I would get around 420-450km in the city for about 60L, which isn't that great either, but my 6MT is rated for worse mileage (just barely) than the AWD IS250 6AT. I've always run a stock intake and I don't hold back on the throttle.
Something seems up with your car, though I'm not entirely sure the intake would be to blame.
Jeff
03-14-16, 12:14 PM
#3
Super Moderator
I notice that you are looking at the "TANK AVG" when the tank is full. It's similarly misleading to look at the "AVG" display shortly after resetting it. Both are more of an instantaneous readout than an average until you've logged a significant amount of kilometers.
03-14-16, 01:27 PM
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90% city driving, i only drive city , rarely hwy
what do you mean by engine code?
2011 IS250 AWD
I went from TAKEDA INTAKE back into my STOCK
I was going to sell my car during this time (tradein) so I went back to stock and sold my intake
however I ended up keeping my car as the trade in value was too low
SINCE THEN my mileage has been 330- under
My last tank was 410..
But I am wondering why it is so hard to get back into the 450's+
I fill 91 octane
and do regular oil changes at 6000km
what do you mean by engine code?
2011 IS250 AWD
I went from TAKEDA INTAKE back into my STOCK
I was going to sell my car during this time (tradein) so I went back to stock and sold my intake
however I ended up keeping my car as the trade in value was too low
SINCE THEN my mileage has been 330- under
My last tank was 410..
But I am wondering why it is so hard to get back into the 450's+
I fill 91 octane
and do regular oil changes at 6000km
03-14-16, 01:47 PM
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03-14-16, 04:16 PM
#8
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it's likely the stock air filter causing this.
Aftermarket air filters have better airflow and i think this makes the engine work less harder therefore providing better gas mileage. I saw a bump in gas mileage after switching air filters.
Aftermarket air filters have better airflow and i think this makes the engine work less harder therefore providing better gas mileage. I saw a bump in gas mileage after switching air filters.
03-14-16, 07:46 PM
#10
Super Moderator
Reference from SAE website: http://papers.sae.org/2012-01-1717/
03-15-16, 12:54 AM
#11
Instructor
i get around 11-13L/100km in the city and lowest 7.9L/100km hwy driving down to seattle w/ gentle throttle on my IS350 rwd and i get roughly 450km out of a tank w/ mix driving... maybe your car is quieter w/o the aftermarket intake and you had to floor it more to hear the engine lol...
03-15-16, 05:24 AM
#12
Pole Position
Did you put back your old intake + filter or did you change the filter?
If you put back the old one that was lying around in your garage, your issue might just be here. Change your filter!
My 2011 AWD IS250 is doing 12-13 L / 100km in town right now. Was doing 14-15L in extreme cold. Highway is around 9L/100km.
Air filter was changed right before winter.
If you put back the old one that was lying around in your garage, your issue might just be here. Change your filter!
My 2011 AWD IS250 is doing 12-13 L / 100km in town right now. Was doing 14-15L in extreme cold. Highway is around 9L/100km.
Air filter was changed right before winter.
03-15-16, 08:20 AM
#13
Super Moderator
Did you put back your old intake + filter or did you change the filter?
If you put back the old one that was lying around in your garage, your issue might just be here. Change your filter!
My 2011 AWD IS250 is doing 12-13 L / 100km in town right now. Was doing 14-15L in extreme cold. Highway is around 9L/100km.
Air filter was changed right before winter.
If you put back the old one that was lying around in your garage, your issue might just be here. Change your filter!
My 2011 AWD IS250 is doing 12-13 L / 100km in town right now. Was doing 14-15L in extreme cold. Highway is around 9L/100km.
Air filter was changed right before winter.
Here is another reference (conclusion posted below), this one from research done by the department of energy: https://www.fueleconomy.gov/feg/pdfs...02_26_2009.pdf
The goal of this study was to explore the effects of a clogged air filter on the fuel economy of vehicles
operating over prescribed test cycles. Three newer vehicles (a 2007 Buick Lucerne, a 2006 Dodge
Charger, and a 2003 Toyota Camry) and an older carbureted vehicle were tested.
Results show that clogging the air filter has no significant effect on the fuel economy of the newer
vehicles (all fuel injected with closed-loop control and one equipped with MDS). The engine control
systems were able to maintain the desired AFR regardless of intake restrictions, and therefore fuel
consumption was not increased. The carbureted engine did show a decrease in fuel economy with
increasing restriction. However, the level of restriction required to cause a substantial (10–15%) decrease
in fuel economy (such as that cited in the literature3,4
) was so severe that the vehicle was almost
undrivable. Acceleration performance on all vehicles was improved with a clean air filter.
operating over prescribed test cycles. Three newer vehicles (a 2007 Buick Lucerne, a 2006 Dodge
Charger, and a 2003 Toyota Camry) and an older carbureted vehicle were tested.
Results show that clogging the air filter has no significant effect on the fuel economy of the newer
vehicles (all fuel injected with closed-loop control and one equipped with MDS). The engine control
systems were able to maintain the desired AFR regardless of intake restrictions, and therefore fuel
consumption was not increased. The carbureted engine did show a decrease in fuel economy with
increasing restriction. However, the level of restriction required to cause a substantial (10–15%) decrease
in fuel economy (such as that cited in the literature3,4
) was so severe that the vehicle was almost
undrivable. Acceleration performance on all vehicles was improved with a clean air filter.
03-15-16, 08:55 AM
#14
Pole Position
Thanks for the link! Very good information.
OP's issue might be solved by doing the learning procedures.
Also, I would recommend not to rely on the dashboard's MPG and calculate it manually (way more precise).
If you top off your gas tank every time, it'll work. Restart the trip meter every time you fuelup as well. Divide the liters you put by the KMs you did since last fuelup.
Example : I put 45 liters and my trip meter indicates 350kms. 45 liters divided by 3.5 = 12.85L/100KM
I know by fact that my car always reads below the ''real'' consumption. For instance, it was doing 15.9L/100km during extreme cold this winter while my car's TANK MPG was showing 14-15. It's a big gap.
OP's issue might be solved by doing the learning procedures.
Also, I would recommend not to rely on the dashboard's MPG and calculate it manually (way more precise).
If you top off your gas tank every time, it'll work. Restart the trip meter every time you fuelup as well. Divide the liters you put by the KMs you did since last fuelup.
Example : I put 45 liters and my trip meter indicates 350kms. 45 liters divided by 3.5 = 12.85L/100KM
I know by fact that my car always reads below the ''real'' consumption. For instance, it was doing 15.9L/100km during extreme cold this winter while my car's TANK MPG was showing 14-15. It's a big gap.
Last edited by Eduskator; 03-15-16 at 09:12 AM.
03-15-16, 09:40 AM
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Did you put back your old intake + filter or did you change the filter?
If you put back the old one that was lying around in your garage, your issue might just be here. Change your filter!
My 2011 AWD IS250 is doing 12-13 L / 100km in town right now. Was doing 14-15L in extreme cold. Highway is around 9L/100km.
Air filter was changed right before winter.
If you put back the old one that was lying around in your garage, your issue might just be here. Change your filter!
My 2011 AWD IS250 is doing 12-13 L / 100km in town right now. Was doing 14-15L in extreme cold. Highway is around 9L/100km.
Air filter was changed right before winter.
hey! yes It was in my garage and I will look into changing my filter my most recent tank is 420km..
still not happy as I was gettign 460+ before
