Is it necessary to use 20-50 wt oil in classic or can a lower viscosity oil be used? Would lower wt oil make trans hard to shift and grind when putting in gear?

 

20w-50 should be just fine!

http://www.minimania.com/part/5492GF...Semi-synthetic




Drive Hard. Drive Safe. Keep Grinning.

 

I ran 10-40 for a while in the winter, but the car prefers 20W50. The more important thing is to find oil with the right quantity of zinc in it to protect the camshaft.


I buy Brad Penn oil from my local oil distributor, I pay about $6.50 qt in a case of 12, that gives me two oil changes and 2 spare bottles.

 

the classic mini Aseries and A+ engine is designed to only use 20/50w oil because of the engine and gearbox share the same oil thinner oils will only cause faster ware in mains and bigend and oil pump

 

Like I said, when I ran it it was COLD out - as in 20-30 degrees F (-6 to 0 C), when it warmed up I changed over to 20W50 and ran that from then on.

 

The more important thing is to find oil with the right quantity of zinc in it to protect the camshaft.

you can by "regular" oil and get a zinc additive

I use this