In many instances these modern `one size fits all` oils are not suitable. My experience with a large British owned oil company who sent a rep along to our museum claiming alsorts of wonderful things with their oils, we trialed their recommended multi grade oil in our Swift the results were virtually no oil pressure when hot and a tendancy to consume oil like it was going out of fashion- this same rep also stated the oil would ok in the older 7.7 and fluid flywheels , I recall him quoting lubricants for the axles and gearboxes stating that EP 80 w would do every thing , really ?What about the additives and the effects on bronze crown wheels etc etc? No problems he said.
My opinion from that experince was that the Swift works fine with a straight 30 HD SAE (used after a thorough flushing out) oil no severe pressure drop and little or no consumption as does the 7.7, using a multigrade oil in a flywheel would probably destroy the Llewelyn gland and centrifugal action with any detergent oil would cause hot spots( so I`m told) and as for the EP oils in the axle and gearboxes the additives are corrosive to bronze. When I later challenged the rep his reply was as the mileage would be so low it would not make no difference!
My advice to any one check very carefully with your manual / lubrication chart and purchase straight gears oils such AG types (non additives) of the correct viscous , engine use a straight 30 dertergent type oil but flush the engine through first) or what ever sae your manual states, in a fluid flywheel use only a straight non detergent oil usually 30 grade.Buy your oil from a specialist oil supplier who have specialists who will freely advise and want you to have the correct lubricant.
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