You mustn't have an OEM filter that says "this side out" which is no big deal, I have used Fram, Emgo (Emglo??) IDK, etc etc. Just make sure the spring goes in the motor first (I keep it in by using grease or laying the trike flat on it's side) and make sure the pictures look correct in the book as far as how it was installed. Spring in 1st, small seal goes out so it forces the oil through the filter.
All our government does is distract us while they steal from us, misspend our tax $ and ruin our country