This would appear to give the best of both worlds. 20/50 viscosity and synthetic with lots of ZDDP as well.
https://www.opieoils.co.uk/p-77374-mille...ology.aspx
However if the oil is too thick from cold then either a wider range (I think that Penrite make a 20/60) or a fan heater on the sump for 20 mins before a cold start are tw best routs.
Charles
https://www.opieoils.co.uk/p-77374-mille...ology.aspx
However if the oil is too thick from cold then either a wider range (I think that Penrite make a 20/60) or a fan heater on the sump for 20 mins before a cold start are tw best routs.
Charles