Yes, DL doesn't collect fuel surcharges for redemptions on KE. However, KE collects fuel surcharges for those using SkyPass miles. To check KE's fuel surcharges on revenue tickets, price out the ticket on ITA and look for something like Q295.00 in the fare details line. This is a Q surcharge of 295. You'll have to research how the currency units work out, and I have no idea if this is the amount they'd collect on an award ticket, but it's a starting point.