Do I need to add a fuel injector cleaner during maintenance?

Where do I add urea?

Do I need to add AdBlue?

I have a 2007 Touran, automatic 1.8t. It jerks noticeably during acceleration. When idling while parked, the RPM intermittently drops by 100-200, and the car lights dim. What should I do? (I've previously cleaned the fuel injectors and throttle body.)

Will driving 5,000 kilometers without adding a cleaner clog the fuel injectors? Do you need to clean the turbo blades at 20,000 kilometers?

What needs to be replaced during the second maintenance, folks?

Car enthusiasts: If one fuel injector is broken, can I just replace that one, or do I need to replace all four?

Do any of you RDX 2.0T owners add fuel cleaner every 10,000 km? The dealership strongly recommends it.

Where can I buy a single fuel injector for the RDX 2.0T engine?

Hey guys, do I need to add a fuel cleaner to my Subaru? 😊

Has anyone experienced this? I went to the 4S shop for the second maintenance of my GS8 fuel version, and they required adding a fuel system cleaner. They said it's mandatory according to manufacturer regulations.