Getting Only 15MPG on IS350 ?!?
Thread Starter
Driver School Candidate
Joined: Oct 2007
Posts: 8
Likes: 0
From: va
Getting Only 15MPG on IS350 ?!?
Hi Everyone, I was reading a lot of threads about mpg on an IS350, and it seems that the average is at least 25mpg.
I bought an 08 IS350 new and now I have 1200 miles on it, at 1100 miles the Control VSC light came on and I had to take it to the dealership to get it checked.
It was a Oxygen sensor ( i can look for the exact code later on today) and they fixed it under warranty.
After 40 miles I got the light again, and they said it was a second Oxygen sensor.
I really only drive in the city, but the MPG is around 15 max 17mpg...
I was reading that some people had bad mpg during their break in period, but I thought after 1k miles it would do better.
Do you guys think there is something else wrong with the engine?
Thanks!
I bought an 08 IS350 new and now I have 1200 miles on it, at 1100 miles the Control VSC light came on and I had to take it to the dealership to get it checked.
It was a Oxygen sensor ( i can look for the exact code later on today) and they fixed it under warranty.
After 40 miles I got the light again, and they said it was a second Oxygen sensor.
I really only drive in the city, but the MPG is around 15 max 17mpg...
I was reading that some people had bad mpg during their break in period, but I thought after 1k miles it would do better.
Do you guys think there is something else wrong with the engine?
Thanks!
How hard to you accel and brake? Are there a lot of stoplights on your normal route? A lot of things can come into play when doing local streets. I decided to take a local route to work today (bad decision) and I averaged 22 MPG
Thread Starter
Driver School Candidate
Joined: Oct 2007
Posts: 8
Likes: 0
From: va
If I drive on the beltway i can get 25mpg, but never better than that.
Mine is just a 250 but after the second oil change i noticed a MPG started to inch up every thousand miles. I just recently installed a JoeZ intake with a K&N drop in filter had have about a 2 MPG increase all around.
see how it does after the first oil change. FYI I changed over to synthetic oil on the second oil change.
see how it does after the first oil change. FYI I changed over to synthetic oil on the second oil change.
Thread Starter
Driver School Candidate
Joined: Oct 2007
Posts: 8
Likes: 0
From: va
Cause: Short Circuit
895131 Oxygen Sensor (one)
223 W
1 89467-30010 Sensor , Air Fuel Rat
980 REPL BANCK 2 Sensor 1 895131 1.30
Which sysntetic oil do you guys use on your IS350?
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Pole Position
Joined: May 2008
Posts: 246
Likes: 0
From: NJ
i get 19mpg on my is 250AWD... i drive with ECT on PWR and i use the paddles/semi-auto ... not ALL the time but ALOT... the ECT is always on though, if i feel it slow a little i turn it off...drive for 10 mins with stops and starts (not highway) and then turn ECT back on and it gets a JOLT... so..i know why i get 19mpg... hehehe
Pole Position
Joined: Jul 2004
Posts: 264
Likes: 0
From: Arizona
So these were very recent repairs. If the computer is anything like other Lexus products, I would disconnect the battery for 1/2 hour to clear any "learned" driving habits and codes from the ecu and give it another shot. A shorted 02 sensor probably kicked your engine into a very rich mode, which also might explain why the other 02 sensor failed.
Depending on your driving habits 15mpg city isn't out of the realm of possibility. When I first got my car i was probably getting between 16-18mpg. However given your history already I wouldn't rule out mechanical issues.
