Tom said:I'd never heard the term 'Oxford comma', and had to look it up. We were taught not to use it but I tend to insert it.
It sometimes serves to eliminate possible confusion if you do insert it. Lists like (Red, White and Blue) are obvious, and I wouldn't use it, but there are instances where leaving it out appears to show an unintended relationship between the items (as pointed out by an earlier post) rather than a simple list.