I have ran into the same situation myself when I first changed the oil on my FRS lol.
I did the same exact procedures you have done and still can't accurately read where my oil level is. I had at least 2 other people with me to double check my oil level to give me peace of mind.
Add little by little, to see if there is any difference on the dip stick rather than adding too much and have to drain the oil again. I recommend having a fumoto oil drain valve for this situation and for easy oil changes.
I think following the owner's manual on how much oil should be put in should help. There is also a dipstick that ft86sf offers that they say would give the "most accurate" reading if that is what you want.
Hope this halps!
