After the service, I took a look at the fluids in the car. There is a tank marked coolant with F and L marks on it, and the the level of fluid in this tank was (significantly) below the L mark - it looks like there are about two cups total at the very bottom.
This means that you can book a round-trip ticket to Hawaii from anywhere Delta flies in the US, Canada, Mexico, Puerto Rico, or US Virgin Islands using Korean Air miles for only 25,000 miles in coach or 45,000 miles in Business Class.
Data point on Delta since you book awards on them: I was looking to book an award from DC to Johannesburg. When I plugged in date pairs for the dates I wanted (and used IAD to JNB), it showed 255,000 miles in business (which is weird, since 255,000 isnât even on the DL chart that I saw).