On 3/10/2015 2:41 PM, Dallas wrote:
Why do reciprocal engines burn so much oil?

I've always wanted to know...



It's mostly air-cooled recips that burn the oil.

The temp range experienced by an air cooled cylinder is large; the
piston is aluminum alloy, the cylinder steel.
Aluminum expands more with temperature than steel, so a sufficient gap
between piston and cylinder is needed when cool to avoid jamming when hot.

Brian Whatcott Altus OK