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40,000 miles and bad gas mileage


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Well I think the time has come, to do a tune up....... @ 32,000 miles I changed all the fluids but did not do a tune up as recommended. Well with this last tank of gas I gone 250 miles and I'm down to less than a 1/4 tank. Wow big loss so I think its time to tune her up..... Does the dealer also change the 02 sensor or is that something I can even do?
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At 40K, there should be no need to replace the 02 sensor. Besides, if it was going bad, it would throw a code.

Not always true. I have seen AF sensors not work correctly and not throw a CEL.

[SIZE=1][URL="http://public.fotki.com/blackfang/"]Pics[/URL] [B]08 KawasakiZZR 600- exhaust and other mods 98 Camaro Z/28 HT- some mods......street/strip car 07 Legacy 2.5i- SPT exhaust...daily driver[/B][/SIZE]
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AF sensors don't usually go bad to though, more like 80k+ miles, for me anyway.

I have replaced a few under the 3/36 and a few before 8/80k. Infact we replaced one the other week, where the AF went bad and caused the converter to go bad as well.

[SIZE=1][URL="http://public.fotki.com/blackfang/"]Pics[/URL] [B]08 KawasakiZZR 600- exhaust and other mods 98 Camaro Z/28 HT- some mods......street/strip car 07 Legacy 2.5i- SPT exhaust...daily driver[/B][/SIZE]
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