If you are as annoyed as I am by the change of the size of the oil
bottle caps a little while back, Then you, like I, would like to spit in
the eye of the genius that decided that all major oil company bottle
mouths would be as large as the oil filler extension on the WBX engine.

There is no way to put oil into the filler neck without an absolute mess
because  the neck of the bottle no longer fits INSIDE the filler neck of
the engine, but is the same size. So, how to deal with this?

First remove the filler cap. Next, pull the filler neck extension out to
it's full length. Then stick your newly acquired piece of properly
fitted PVC-pipe-extension-with-elbow-added into the filler neck, with
the opening of the elbow turned up.  Now pour your oil into the elbow.
No more mess. Oil goes right down the filler neck. When done, store the
PVC in a plastic ziplock bag under the back seat!

Regards,

John Rodgers
88 GL Driver