I didn't read every reply in this thread so if someone mentioned this already it just means you should pay even more attention to it.
Most of the time, even on cheap chain, excessive stretching is because the chain is run too tight. Most people run chain too tight, and that stretches it out fast. Number of reasons for it, some are trying to keep it cutting straight after it dulls or they hand filed it and got the cutters messed up. Some are runnning it too tight because their bar needs dressing, even if it looks new.
Low quality bar oil lets the rivets wear out the chain, so it really isn't stretching as much wearing the holes in an elongated shape, which makes the chain longer, so same result as if it stretched.
Mr. HE
Most of the time, even on cheap chain, excessive stretching is because the chain is run too tight. Most people run chain too tight, and that stretches it out fast. Number of reasons for it, some are trying to keep it cutting straight after it dulls or they hand filed it and got the cutters messed up. Some are runnning it too tight because their bar needs dressing, even if it looks new.
Low quality bar oil lets the rivets wear out the chain, so it really isn't stretching as much wearing the holes in an elongated shape, which makes the chain longer, so same result as if it stretched.
Mr. HE