1. I have poor gas mileage, but no check engine light. The exhaust smells pretty bad but isn't particularly visible or black. Is it possible I need new O2 sensors without a CEL? Will this cause an issue if I don't replace the catalytic converters at the same time? I have a very basic code reader... but could a better one diagnose poor O2 sensor function?

2. Anyone try whiteline LCA bushings? My passenger side LCA is seized up... do I just get a whole replacement for $75 with the Toyota rubber bushings or should I install whiteline bushings?