Re: Oil drain back/spark plugs

[David Urschel <durschel@sprynet.com>]

Yes it's necessary. The filter has an entrance and an exit—oil drains either
way when the engine is stopped. The built-in valve prevents drainback towards
the pump. The tube prevents the filter draining to the oil galleries.

David Urschel
srl31-10465

"Hall, Phillip" wrote:

> OK smart Roadster people
>
> Is the oil drain back tube necessary when using new oil filters with drain
> back valves?  My present Roadster is missing her tube.  I used to make them
> out of old ski poles.