Use anything to keep moving and decide how soon to change it afterwards IMHO. Any motorcycle oil goes to the next oil change, most diesel oils will too. It's chainsaw and petrol car stuff you want out within hundreds rather than thousands of miles. Don't get all Ewan and Charlie about it either, anything that doesn't make the clutch slip is taking life off the end of things not now, chances are if you do it once now some bloke who buys a rat in 2020 will neither notice nor care.
Andy