Skyking:
What did the dipstick read after you added 7 quarts and ran the engine a little while? My dipsticks read a quart lower than what's actually in the engines. If I have seven quarts in the engines (stick reads 6) oil use is about 1 quart per 9 hours. If I run at 7 on the dipstick, I get oil out the breather, and lose that top quart very quickly. You should check the stick right after changing the oil and doing a runup. Let it stand overnight and check it again, as you'll probably see at least half a quart more after standing overnight. Now you'll have a better idea in any given situation how much oil is actually in the engines.
Mitch
N5251Z (O-2A)
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