I had my #1 engine FOH this past spring. After every flight, the underside of the cowling, exhaust, gear doors, etc. are an oily mess. The #2 side leaks to an extent as well, but not nearly as bad. I go 25-35 hours between oil changes, with no measurable oil loss. I do my own oil changes, and clean the engines up as close to spotless every time. However, the #1 engine is leaking more than I think a recently FOH engine should. I've taken it back to the shop that did the FOH once to try to correct it, to no avail. I'm of the mind that the "new" engine basically shouldn't leak a drop of oil. Is this something I just need to live with, or am I within my rights to hold the shop's feet to the fire? I've put about 150 hours on the engine since the FOH. Thanks.