[singpilot]

Mike;

I have several (LOL) air and water cooled bikes. Wet clutches mostly. So that means the motorcycle oil, SG I think. I have been using the Valvoline 4 stroke stuff 20-50. It is reasonably priced in quantity to make early changes (2K miles) easy.

I have often wondered about the cold change. After the drain is down to a drop or so, I usually pour half a quart in with the drain open to 'flush' the remains out of the pan, and it seems to work; there is half a quart or so of black stuff comes out before the new oil drains, hot or cold. I always drop the filter first, in case the check valve was to allow the old oil to drain back. All of my filters (except for the beemers) are wrapped with the magnetic band.

There are times I cannot run the bike to warm it up, and figured by leaving it to drain for a long time, and tilting the engine to get it all out, along with the above, I had to 'be there' compared to the warm oil change.

How much does the oil analysis cost, and would the layman be able to interpret the results?