3 engine failures in 800 hrs of PPL flying in SEPs. 2 on the same day, same aircraft. In all 3 cases, landed at a pukka airfield that was within reach.
1 was a split crankcase - lost all the oil at 1300 feet on climbout.
the 2 were down to bad mixture adjustments on a Gipsy engine (Chipmunk). The first occurred taking it to a Gipsy expert for tuning. The second occurred on the way home from tuning !