Uploaded a photo on the Miata 3D Printing Association on facebook (If your not a member its worth checking out!) and had a lot of interest in this so i thought I'd spend some time in thinking about what's needed and designing a couple.
After a little demand, I have made this version for a Mk3 NC / Mk4 ND Mx5.
This is designed to speed up the flow of oil and also be a sturdy platform for a funnel to fit.
This a bayonet type fitment and has been successfully tested on a Mx5 and a Fiesta 1.0 ecoboost.
I understand that NC and ND oil caps are interchangeable So this should fit a ND as well.
NC_fixed_1.stl | 148.7KB |