Yes. With all due respect, what does that have to do with my asking if they'd pay return shipping if I no longer want to use their products due to their misrepresenting their oil filter (my perception, thus my reality)?
If at a restaurant and a server brings over a dessert tray, it doesn't hurt to ask for a sample.

The worst thing they can say is "No". You both laugh it off and nobody gets butt-hurt. I can then decide if I want to invest in their dessert or not... or pay return shipping.
Now I'm craving another slice of Sticky Toffee Pudding with custard from The Devonshire in London.