Ok. I'd love to see a new icon for vending machine fuel too. However, to make this happen, we'll need to go through a process with OsmAnd. First, we should seek general community agreement on this matter.

Based on earlier investigations and discussions, it appears that the "amenity=vending_machine + vending=fuel" tag combination is primarily intended for detailed mapping of individual fuel pumps within a fuel station (amenity=fuel): https://wiki.openstreetmap.org/wiki/Tag:amenity%3Dfuel

OSM is all about community involvement, and with so many different renderers out there, we can't just create our own tag system and tweak data to make it look perfect on our favorite renderer. 😊