Page 6 of the Q3 report states the following at the bottom of the page concerning Dilbit:

"Bitumen produced at Great Divide Pod One is mixed with purchased diluent and sold as “dilbit.” Diluent is a light hydrocarbon that improves the marketing and transportation quality of bitumen. For the reported volumes, diluent purchased represented approximately 28 percent of the dilbit barrel sold, with bitumen the remaining 72 percent."

And as sydneyB stated it is NAPTHA.

Cheers; Scott