The 60°C is required prior to draining to ensure that all the impurities are suspended in the oil when drained - otherwise not much point in changing it Petemoizeau wrote: 11 Mar 2020, 17:08 The initial dump of oil just needs to be nice and hot, the temperature is only necessary when setting the level.
@Iansel: You should be fine then - but a good point to keep a note to get it done in future to ensure longevity and good operation of the box Ian.