Pre-WW II oil embargo on Japan

I’m looking for some kind of specific reference as to exactly what petroleum products FDR prohibited the sale or export of to Japan in the run up to WW II. I ask because I nurture some vague memory that it was not a blanket ban.

Any help’s appreciated.

Try this:

http://www.historybookshop.com/articles/commentary/pearl-harbor-energy-war-ht.asp

Thanks, GIGObuster!

Salient points garnered on a first read:

I’m still looking for more.