On 2/2/18 1:44 PM, David wrote:
replying to rb608, David wrote:
I needed have they said I need a oil whistleÂ* cap for outside could
you what
that mean and do I get one


They probably mean this:

https://www.homedepot.com/p/Belle-Fo...038P/202274805

It keeps leaves and small animals out of the vent, which can clog the
whistle, which is in or near the tank.

BTDT ;-)