Hi all,

Maybe everyone else already knows this, but it apparently took a while for me to figure it out.

It's seems to be true that burping the engine oil system when it is cold (like zero F or thereabouts) takes a lot of revolutions to push all the relatively thick oil back into the oil tank.

If I check the oil level right after shutdown...it is definitely down the dipstick so some of the oil is not in the oil tank at that point.

But...it takes very few revolutions of the prop to burp it when it is warm after shutdown.

I found that by burping the engine not too long after shutdown, the oil appears to stay mostly in the oil tank afterwards; and, it only takes one or two revolutions to be sure the burp is complete after the engine is stone cold a day or more later. The oil level appears to stay up in the oil tank after a warm burp.

Wondering if this is similar to the experience of others; or, if this works only in certain installations?

Thanks,

Dave S
KF7 Trigear Flying
912ULS, Warp Drive