Tutoro Auto Chain Oiler

[Fazafou]

There's a large metal disc in there with a needle that blocks off the flow when stationary. When the bike hits bumps etc in normal riding, the movement makes the weight lift and allow flow.

I had one and ended up chucking it, flow eventually stopped over time.

I now use a PDOiler which is electrically pumped. No fiddling around with gravity feed and it's a controlled output regardless of temperature etc