[TR] Engine oil?

[John Gillis]

I have completed my first post rebuild 500 miles, quite happily, few bits and
pieces but generally a successful shake down of my TR2. I want to change out
the running-in oil. Is there a consensus on the best engine oil 10w/30, 20w/50
or a straight monograde, should I choose a classic car oil or will a modern
type do. I should avoid synthetics, right?
Regards
John
1954 TR2 (long door)