Some more on oil for Mini autos in links below which may be of interest:-
https://autominiregi...auto-engine-oil
The selection of motor oil for classic Minis:-
https://www.widman.b...ic-mini-oil.pdf
"Automatic Transmission - The AP automatic transmission used in the Mini is very sensitive to viscosity since the grooves on the discs are very shallow. The oil must displace quickly. And it should have additives to make the discs grab each other instead of slipping or chattering. If today’s gasoline oils, meeting API SN or the latest ACEA specs are used in this transmission, the discs will slip and wear out rapidly, just like slipping the clutch of a manual transmission car. While diesel formulations do not have those slippery friction modifiers, and are therefore better, the Motorcycle MA2 oils have a special friction modifier that make them grab between 35% and 100% better than diesel formulations (depending on the brands). MA2 oils will give noticeably better shifting and less particles in the oil and filter when you change it."
Thanks for posting this - realised that I've been using the wrong oil (thankfully not that many miles at all) - and as luck happens the right oil is the same as I use in my motorbike. Score.
