I own an Opel Astra H 1.6 Caravan 2005 with a manual transmission (from Hamburg, Germany)
I'm driving it in a post-soviet with low fuel quality. As there is no fuel filter in the system (I checked several times, even "professionals" in my country are in shock) I have to "wash injector" couple times a year.
Would just adding a simple filter to the fuel system be OK?