Did an oil change today and I found a cheap and easy funnel that screws onto filler neck. I usually dont use a funnel at all but I think I might now.
1. Get an empty PENRITE oil bottle (some others may fit)
2. Cut off the bottle just below the bottom of the handle
3. Cut off handle (it gets in the way when screwing it on)
4. Block the hole up where the handle was with something (otherwise oil will leak out the hole where the handle was) See pic 2 there is a hole.
5. Thread matches the filler neck thread so you can screw it on and off all day and fill car with oil painlessly lol
Oil will leak out the handle hole if you dont plug it \/