Because it's not as "dry" as it should be, particularly after a long lay up. You can either try and scavenge the excess oil in the sump back to the tank on start up, hopefully without it all ending up down the front of the engine, or drain it out before starting and put it back in the tank. The other hazard of starting the engine with all (or most of) the oil in the sump and a pair of big pistons thrashing up and down is hydraulicing and blowing the engine seals. Some X-Wedge engines do not drain the oil tank into the sump, mine is pretty good fortunately, but others are not good in this way.
Last edited by planenut; 20/10/22 05:54 PM.
