Natural Gas burns so clean your oil doesn’t need changing.
I don't recommend that idea. Your oil is going to still need changing. It may be cleaner, but it is still breaking down due to the heat.
>>Natural Gas burns so clean your oil doesnt need changing.<<
In fact one in two commercial vehicles in Russia is natgas-powered since earlier 1980s, many larger guzzling family vehicles too. They are still changing oil, thus not so often, but plugs are surely eternal.