Over 50 years in aviation and 12500 hrs worldwide.
Engine Shutdowns
2 Engines nil
3 Engines 1
4 Engines 2
Based on my experience I would say that twin engine aircraft are very reliable, engine wise.
SRM
There you go, Your experience shows the folly of believing that 4 engines are always going to be safer than two, and if old mate engineer drives to and from the airport, then his argument is null and void.