lml@lancaironline.net Mailing List Archive

Adam, I was intrigued with your air lack of filtration tradeoff so I forwarded it to a young friend for interest. It happens he's worked in a aircraft shop the last two summers. In that time they have had two instances of having to remove birds or bird parts from inside the cowling. In once case there was stuff in the rear-facing carb inlet. e.g. 180 degree turn. I'm wondering if a little finer screen would be in order?

On Jan 20, 2014, at 2:13 AM, Adam Molny wrote:

Bill -

>Curious though, do you know why the silicon dropped by almost half over the last 100 hours?

>The extra 2 quarts of oil might explain it.

I just read an article by Mike Busch saying that the silicone in many sealants can find its way into the oil and silicone level will drop after a few oil changes. My engine was freshly rebuilt before the first flight, so that makes sense. Also, I installed a new prop shortly before my last oil change. I had to add a quart to make up for the oil that filled the prop hub. Adding fresh oil dilutes the dirty oil, bringing my numbers down. However, I think Blackstone takes that into account since they ask for the amount of make-up oil added between changes. BTW, I change my oil and filter at 50-hour intervals and typically add 3 quarts between changes. That works out to 1 quart every 17 hours.

-Adam Molny