I heartily agree with all of the sentiments expressed by SSD. All PA28s, C150s etc should be put in a big pile and set on fire, for the general good of aviation. Their pilots should be sentenced to clean Gipsy engines with old toothbrushes.
Only one point Shaggy: Lycomings in upside downy aeroplanes don't lob oil around. Cap 10s and Slingsbys have Lycoming AEIO-360s. The oil goes glugging through the inverted fuel and oil thingy bolted onto the back. The Bulldog has basically the same engine, but without the fully inverted thing, and that doesn't throw oil about either.