I needed a gasoline funnel for my Mazda MX5. Most of the relatively big funnels are centered hole, but due to to the fuel door at the left, I could only use a very small funnel while refuelling the car. This would create a mess and would spill gasoline outside. So I designed this big funnel, with offset center.

I printed it in PLA and have been using it 50+ times for more than 5 months now without a problem. I printed it initially in a 310x310 bed printer, but I included the solidworks project so you can resize it down as you need. If you don't have/know how to use solidworks, just put it in the slicer large side down, and dip it downwards until it fits your printer.