TL;DR
Burner inserters change their swing speed based on the fuel grade.What?
Burner inserters should swing faster based on the fuel that's used to power it. Using wood to power a burner inserter would be slower than a burner inserter powered by nuclear fuel. Quality should affect this as well. For example, quality wood should allow the inserter to swing faster than normal wood used to power the inserter.Fuel consumption would be respective to how fast it actually moves. Burners at higher grade fuels will consume fuel at the same time rate as lower grades, but complete more operations than lower grades within the same timeframe.
Why?
- Thematic: More power available means greater intensity of the machine if assuming a crude combustion engine. One that cant conserve the energy through longer duration is instead forced to expunge said energy in more intense movements.- Balancing: Burner inserters tend to fall off by mid game due to electric ones providing more capabilities and an overall faster swing speed. Builds that rely on burner inserters are at a disadvantage to the electric ones as a result. Giving the burner inserters a way to compete with the other inserters by adjusting its swing speed via fuel grade allows for more interesting setups utilizing burner inserters, and a greater need for the production of those types of fuels. For example, a burner inserter powered by rocket fuel might be faster than a regular fast inserter but comes with the stipulation of setting up some way to fuel that and produce it for that purpose.