An ICE engine needs to be run regularly and to get hot to keep it in good working order, if not the internals will get gummed up with carbon and contaminated oil.I have had a Niro Phev 3 for 3 months now. In that time I have done just over a thousand miles but used only approx 5 litres of petrol. The majority of my trips are less that 5 miles so I have been charging regularly and driving in ev mode. My question is will this harm the petrol engine and is it good practice to run in hybrid mode every so often even if your battery is charged?
The worst thing for an engine is short journeys as it never gets hot enough to get rid of condensation in oil and exhaust, also petrol degrades in left to long in tank without replenishment.