I love it (especially on youtube) where people say you must use xyz super oil from unicorn poop (that's why it is purple i guess). My "newest" car is 17years old (190Kmiles), my mowers are from the 80's, had snowblowers from the 60's, had a 70's bobcat - all using plain dino oil in original motors.
The people who tell me im using the wrong stuff have a 2 year old car and new riding mower...
Moral of the story- any respectable oil brand name and you can't go wrong.
ps- boobala, do u have Theresa's phone #???