Towing temps

Step back and take a look at the big picture....factored by eras of both the
vehicle and components of that era from which they were designed...

Many...most...only take a myopic view and the bigger picture is that all things
and more so with lubrication fluids...has an optimal temperature operating range

That has a min and max temp range....plus other factors listed in their specification

Find out what your vehicle specifications are for these fluids in question and
the supplier/manufacturer of those fluids. Both will have min/max temp & other
ranges

As for dealers that some refer to as 'stealers' and other unscrupulous mechanics
all make 'extra' on ignorant (not a derogatory...just means no educated or not
knowledgeable) on the topic. In this case, automotive....find your specifications
and read up...

Also, so many take an absolute position on things...meaning that if it works for
them...it is absolutely correct for EVERYONE out there...or if it didn't work
for them...bad for EVERYONE out there...it depends...