Screw on Funnel for Pouring Oil into the Engine

UPDATED!

I have went back to the drawing board and updated the original design.

1. I found the threads were hard to insert into the valve cover of my Acura.  So I made the threading slightly smaller, more flat at the tip end and tapered it at the end.
2. Original design had a wall thickness of 1mm.  Found this to be too flimsy.  So I increased the thickness to 3mm and it's much thicker and much less prone to breaking.
3. The original STL files were made from an STL I made directly out of Solidworks.  The new STL files are made from a STEP file and it's a much higher resolution 3D model.  No more octagonal lines printed up and down.  It's more circular.  I have also included the orignal STEP file if you want to set it up in your slicer yourself.  If you want the short cone, just use cut in your slicer to your desired range.

Ever had that issue where the funnel moves around on you too much while doing your oil change?  Well this is for you!

This fits a WIDE range of cars from Hondas to Hyundais.  Pictured are the cars this funnel is confirmed compatible with (an Acura TL and a Veloster N).

To avoid a bubble from forming and popping, spraying oil everywhere, there is a breather tube that runs along inside the funnel.  Don't pour anything into that tube or it defeats the purpose of it being a breather tube.

There is a large funnel that stands 213mm tall and has a 200mm diameter funnel opening.  It's great if you're the type of person to extract every bit of oil out of the bottle so you can just toss the whole bottle in the funnel for that.

Then there is a small funnel that stands 113mm tall with a 114mm diameter funnel opening.  Good for a quick job.