My '95 850T has 48k miles. Mileage seems to be down quite a bit although it had a tuneup at 30k and filter change at 39k as well as fuel injection cleaner. The O2 sensor however has never been changed. Although no code/light has turned on, could the sensor be on it's way out? Would It be a good idea to change the sensor now before it does crap out? Just want to make sure my Volvo is running at it's best.
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'95 Volvo 854 Turbo: Gold Edition K&N Air Filter, Leather, 6 disc CD-changer, Rear Spoiler tinted windows
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