Plenty opinions here!
So I'll add mine: some manufacturers recommend premium in order to be able to advertise higher horsepower--the engine may only reach the peak hp with premium. I use midgrade in my '99 LC and if there's a difference in performance highway or city I ain't smart enough to...
I got the dreaded PO135 code on my '99 LC. "02 Sensor Heater Circuit Malfunction--Bank 1, Sensor 1." Does anyone know where this sensor is located? Is it the one with the triangular-shaped flange? Any experience with aftermarket 02 sensors? My dealer says not to, but they would...;p