Mazdaspeed MZR 2.3L oil funnel

This is a vented oil funnel for 2.3L MZR DISI Mazdaspeed engines (like my 2012 3).

I could never find a funnel that sat well in the oil filler, so I made this one. It is rock stable on the engine.

It fits snugly inside the filler hole, has slots for the oil cap lugs, and vents so it won't glug if you manage to pour fast enough to plug the 1" throat.

All angles are 45° or less, so it requires no supports.