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Another "my gas mileage stinks" thread.

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Old 12-03-07, 08:34 AM
  #46  
forcefed86
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With the check engine light on I'm getting 25mpg highway.... I just make sure all my tires are aired up and everything is in good running order. Also if yu have a wideband w/ a new sensor U can just run the narrow band signal wire off of that to the ecm's NB sensor wire and you don't have to go buy new sensors....

Just a thought....
Old 12-05-07, 10:42 AM
  #47  
CyBorG
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Originally Posted by Koma
The SC's have a 20.6gallon tank completely dry. The gas light I think comes on at around 18gallons. In the city I'm getting about 16mpg... highway I get around 20. I baby the throttle too. I can't complain though, the car was handed down to me, at least I have a car to drive around in.
I'm not so sure about that, the lexus handbook for my 1993 says its ~16 for the gas tank. Maybe alot of people are getting drastic different ranges for mpg because they are dividing by the wrong number?
Old 12-05-07, 03:28 PM
  #48  
TheMole
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Originally Posted by CyBorG
I'm not so sure about that, the lexus handbook for my 1993 says its ~16 for the gas tank. Maybe alot of people are getting drastic different ranges for mpg because they are dividing by the wrong number?
Says ~20 gallons on my 93 owners manual. There is a second number right beside it that says ~17, but that is in imperial gallons, which is from the metric system.
Old 12-05-07, 04:55 PM
  #49  
CyBorG
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Originally Posted by sc300max
Says ~20 gallons on my 93 owners manual. There is a second number right beside it that says ~17, but that is in imperial gallons, which is from the metric system.
Ahh, yeah I just looked at my manual and it says ~20. Musta got mixed up with my other camry
Old 12-16-07, 05:35 PM
  #50  
atx
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I felt like reviving this thread to refute some of the VVTi claims of better gas mileage... I have a '98 SC4, and I'm getting some crappy city mileage (of course, living in hilly Austin doesn't help). After I first purchased the car, one of my O2 sensors went out and I was getting around 15mpg city, but 20-22 highway. I replaced said O2 but am only getting 17mpg city (actually, just under 17) with the same highway.

This is starting to irritate me. Hell, my friend's V8 camaro gets well over 20 mpg in the city! I know I know, luxury V8. But still!

Does anyone know where I can find information on testing my current O2 sensors? I recently bought an RMS tester from Sears (voltage, resistance, etc.) so if I could test these before simply replacing them... :P

I think I will also try to find a K&N filter or something. Anything that helps!
Old 12-17-07, 09:29 AM
  #51  
Luke_in_SD
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just curious did they throw a check engine light before?
Old 12-17-07, 01:01 PM
  #52  
Luke_in_SD
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did anybody gain any mpg by changing the 02 sensors?
Old 12-17-07, 01:21 PM
  #53  
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i got 22mpg if i shifted at 2k rpms the whole tank haha.
Old 12-17-07, 04:40 PM
  #54  
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which 02 sensor was it? need to know....
Old 12-17-07, 04:50 PM
  #55  
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My check engine light came on for the O2 sensor before the CAT on the driver side. I changed it a month or so ago and haven't seen any improvements in MPGs, etc., and my CE light hasn't come on again. If they were cheaper I would just replace the other 3 as a test, but everyone knows how expensive they are...
Old 12-17-07, 05:26 PM
  #56  
over40driv
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A 98 SC400 has 4 O2 sensors?
Old 12-17-07, 05:33 PM
  #57  
Luke_in_SD
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A 95 has 4 sensors. 2 before each cat and 2 after each cat.
Old 12-17-07, 05:34 PM
  #58  
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I don't have a check engine light on. But I am getting 14 mpg, used to get 21 mpg, so i am debating on changing them
Old 12-17-07, 07:34 PM
  #59  
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Originally Posted by over40driv
A 98 SC400 has 4 O2 sensors?
Yes, same setup as Luke described.
Old 12-18-07, 10:24 AM
  #60  
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I get 12-15 mpg city on my 98 sc4.

I got 26 highway once. That was going on a 600 mile road trip though. Empty, gas station, highwway till empty....


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