2005 Corolla, 299,000 miles.
Bought new, have maintained it well, but never used fuel additives.
It does NOT get top-tier gas 95% of the time.
Around 270,000 miles the check engine light came on and it began idling really rough. Short on time at that point so I poured a full bottle of Si1 in from O'reilley's. After 3/4 of a tank, the light went out and it was running smooth.
Now, 30k miles and almost two years later, same exact thing...in a half-tank, the light is out and is running smooth.
These are the only two times I've used fuel cleaner in this car.
Bought new, have maintained it well, but never used fuel additives.
It does NOT get top-tier gas 95% of the time.
Around 270,000 miles the check engine light came on and it began idling really rough. Short on time at that point so I poured a full bottle of Si1 in from O'reilley's. After 3/4 of a tank, the light went out and it was running smooth.
Now, 30k miles and almost two years later, same exact thing...in a half-tank, the light is out and is running smooth.
These are the only two times I've used fuel cleaner in this car.