I noticed in my area, the car with fuel injection will drop fuel mileage and lost acceleration after 6-7.5k which will be restored with half tank of fuel mixed with Redline SI-1. This happens with all the common Top Brand Fuel like Mobil, Shell and Caltex.
SO I am wondering if that is normal to add those fuel system to maintain system performance ?
SO I am wondering if that is normal to add those fuel system to maintain system performance ?