Here’s an example sentence to help show why I think the Oxford comma should always be used, wherever possible: -
- I like Ziggy Stardust and The Spiders from Mars, and Tom and Jerry.
This could be ordered, as suggested above for non-advocates, to:-
- I like Tom and Jerry, and Ziggy Stardust and The Spiders from Mars.
But may not be reordered to: -
- I like Ziggy Stardust, Tom, Jerry and The Spiders from Mars.