sorry to bring up an old thread. but i do a lot of highway driving. 70km trip to work. has maybe 5km of non highway. after cleaning the front o2 sensor i have got the economy from around 10l per 100km to 8.6l per 100km. just that one highway trip. after a bit more driving around town. more trips to work and back. looking like i will average out to between 10 and 11l per 100km.
not i know. on paper we should be getting 10l per 100km as an average but i have read about a lot of people getting 6.6l per 100km for highway driving... (which some complained about)
so im curious. is there something wrong with my car? or is just dirty o2 sensors. and on that note. can i replace them with something other then a genuine one?
car is a 2001 lexus is200 auto with 25xxxxkm on the clock. recently serviced. with good tyre pressure. and down the highway its normally set to cruise at 110kmh. have done all filters, plugs, engine flush. fuel system clean (5 times in 15xxxkm) and other then this car runs perfect.