Jectron is basically the same product as Fuel Injection Cleaner sold in Europe, only it is sold under a different product name in the US market.
That said, it is quite effective and whilst Liqui-Moly recommends using it every 2,000 km (1,250 miles), adding a bottle every 5,000 km (3,000 miles) wouldn't hurt.
Alternatively, you can use Speed Tec, which is an UCL designed to improve acceleration under partial load. It also contains a cleaning agent to keep the injectors and the rest of the fuel system clean and lubricated.