Jack, When I hit the send key, I knew I should have stated my RPM's for my oil burn. Usually I cruise at 2350 to 2400 rpm, because the engine really smoothes out and sings at this point. Below 2350 things just seem rough and laboring... not to mention that airspeed dwindles. Flat out in level flight, I am pitched to barely turn 2500 rpm. 2350 rpm on an 80 mph climb out with Wide Open Throttle. BTW.... NOTE: NEVER, NEVER THROTTLE BACK IN CLIMB. Wide Open Throttle allows extra fuel through special carb jetting to cool the valves\cylinders on SUSTAINED climb out. If you have an EGT, you can see observe this for yourselves.
N99784 leaks very little oil and blows next to nothing out the breather pipe. You are aware there is a NOTCH at the exit end of the pipe\hose? NOTE: This keeps any SIPHONING EFFECT under control. One cylinder's spark plug has noticeable oil residue. I too have been staying below 4 quarts thinking that had some effect. Others have told me that reducing RPM's would help, but THIS MUCH?!?! If I can discipline myself to 2300 rpm, I will report back with my findings, Jack. As an aside.... Just got finished with an owner assisted annual, so now I have a whole year or a actually a day shy of 13 MONTHS to blunder through the sky! Yes, 13 months if you play your cards right! Get your annual at the first of the month and run until end of month expiration and then annual the beginning of the next month. Got it? Paid the IA 5 hours @ $40 hr for his time while I did most of the work. Flew 100 hours for a cost of $2 per hour for the annual. Not bad. $5 hour gas. 70 cents per hour for oil. $9.60 hour for hangar. $2.30 hour for full coverage insurance. Say 40 cents\hr for tires, etc rounding out about $20\hr at 100\hr per year including hangar. Outside tiedown on concrete is $45 a month so giving up the hangar could save $420\yr or $4.20 an hour. Of course outside storage will run up maintenance costs like paint, Plexiglas, interior, etc. Of course covers could defray those costs. Difficult to justify hangar rent. But those pesky birds....... Thanks for the input. Bob Urban > >++++++++++++++++++++++++++++++++++++++++++++++++ > Bob > My C-85 used to use more than a qt of oil in an hour and always had an > oily belly. Now I keep the RPM's less than 2400, try to keep it at 2300 and > I actually get about 10 hrs on a qt. So far I have 9 1/2 hrs and have not > had to add a qt yet, since the last oil change. My compression is not that > good either: #1=73/80, #2=63/80, #3=75/80, #4=74/80. > I used to only fill it to 3qts but now I fill it to 4qts. Don't have near > as much oil on the belly either. THAT'S THE TRUTH. > > Jack G.(U42)Utah > N103JF, SN:745
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