Is the Fox 1.0t throttle related to oil products?

The throttle is before the engine mixes air, so the gasoline can't reach that place, so the dirty throttle has little to do with the quality of gasoline, even using American gasoline will be dirty. A dirty throttle will increase fuel consumption.

In fact, there are many reasons why the throttle is easy to get dirty: engine oil problems, air quality, careless general maintenance, timely replacement of gasoline filter elements and carbon deposition in spark plugs!