Angled oil funnel that i made it to fit on my 2012 Mustang GT. Ford seemed to use a larger oil up until 2018 then a smaller one from then on. I made this fit the smaller one so it works on both kinds. Little loose on the older caps but snug on the smaller ones. I used a o ring because I had one laying around. It does not actually need it but it does fit better with one. It takes a #217 o ring 1.171"ID 1.449"OD .139" Width or you could borrow the one off your oil cap while filling.