My toyo got 21mpg in all driving conditions until a few months ago. I know because I reset the trip meter at every fill-up. The fuel light came on at
320 and I added ~16gals by 340. Suddenly, a few months back, the light started coming on after 250 and I had to stop by around 270. That's only about 4mpg, but it's still 20%!! I've replaced the following trying to fix the problem but still no luck: * spark plugs * air filter * pcv valve- fuel filter *
Now I'm thinking it may be the O2 sensors and am considering getting an OBD link like the following:
Thanks for your help, JJJ.