First off you fuel system doesn't need cleaning. The gas you run through it is clean and on top of that, filtered inside your car. Secondly, no the grade of fuel makes no difference.
On the first point here I disagree. IF you only use top tier fuel then perhaps the fuel system cleaner isn't absolutely necessary.
But even so using a good fuel cleaner like sl-1 should help keep pistons and valves cleaner than not using it.
On the original point. No you don't need to use premium fuel. It is sometimes discussed whether higher octane would make an engine run hotter or colder and whether that would help.
But there is no real consensus and it is really theoretical. Using the fuel system cleaner at the recommended octane for your vehicle is what you should do.
Edit: Sorry I see this is in Israel, and 'top tier' fuel is a US thing. The point is the name brand fuels likely are putting adequate cleaning detergents, etc in the fuel. Avoid off-name/no-name fuel stations if you can on a regular basis. But the sl-1 should still benefit you.