Hi Jim,
I believe the oils are coming from the Sumatra in the blend. Our current lot of Sumatra is slightly different than previous lots. It does oil up a bit quicker than the previous lots. There are a couple things we can do:
1) When you order write in the comments you would like a lighter roast. With our regular Morning Dew we roast the Sumatra dark and the Central American coffees medium. If you like, we can roast the Sumatra with the Centrals to a medium roast. You would need to order a minimum of 5lbs (due to roaster limitations - could be split amongst different package sizes.)
2) You may want to try Americana https://www.nectar-of-life.com/Americana.htm. It is more or less the medium roasted portion of Morning Dew.
We will be getting a new lot of Sumatra in a month or two. I won't know how it will oil up until we get it.
Thanks!