**5. Conclusions**

As a result of the experimental work carried out with a single-cylinder engine operating in single-fuel (methane) and dual-fuel methane (MC) + propane (PC) modes, it was found that


The advantages of a single-fuel methane (MC) + methane (PC) system over a dual-fuel methane (MC) + propane (PC) system are as follows:


The positive aspects of burning propane in a prechamber are as follows:


**Author Contributions:** Conceptualization, I.P. and F.S.; methodology, I.P. and F.S.; software, I.P. and F.S.; validation, I.P. and F.S.; formal analysis, I.P. and F.S.; investigation, I.P. and F.S.; resources, I.P. and F.S.; data curation, I.P. and F.S.; writing—original draft preparation, I.P. and F.S.; writing—review and editing, I.P. and F.S.; visualization, I.P. and F.S.; supervision, I.P. and F.S.; project administration, I.P. and F.S.; funding acquisition, I.P. and F.S. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Data Availability Statement:** Not applicable.

**Conflicts of Interest:** The authors declare no conflict of interest.
