Rob wrote:

I just used engine oil in the end. ISTR the Project oil
supplied with a TT had a similar consistency.

I don't think there's one answer to the question 'what's
best' - it's always going to be a compromise between
friction and (say) evaporation. I know heavier oils have
been criticised for 'noise' - I couldn't really say.

:-)

10/40? For years, audiophiles have suffered the curse of
temperature-induced platter bearing drag variance. At last,
Rob's specially-formulated turntable oil maintains precise
viscosity even at high speed. Don't be caught out by global
warming...

Near enough, I hope. Inspect and report back in twenty
years.

Ian