Originally Posted by Rusty

I had a couple bottles of Castrol 4 Stroke Racing oil for the motorcycle sitting on the shelf behind a few things. Forgot all about those bottles for a couple of years. Out of sight, out of mind. Decided to start to ride the bike more, and it needed an oil change. Drain the oil and changed the oil filter. Opened up the first bottle and it poured ok. The 2nd, 3rd, and 4th bottles each had chunks of oil come out. Drain all of that out and got 5 qts of fresh Mobil1 bike oil. Couldn't get that type of Castrol oil anymore.