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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil Viscosity
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<blockquote data-quote="greg brillus" data-source="post: 85310" data-attributes="member: 597"><p>Hi there Alyn, I don't believe so, It is just a HPR 30 mineral. I have been using 20/50 weight oils in all older machines for many years with no bad effects. I only chose it for its zinc content, but even using it in my oil can which i use a lot, I could tell straight away that it was a much heavier oil. Probably fine in a brit parallel twin like a Norton or Triumph, but I think the drag is more obvious in a roller bearing crank especially with four bearings. I had almost convinced my self to go to coil ignition to help the problem, but it seems the thinner oil definitely allows the engine to spin over faster. I know Diesel oils keep the insides of an engine much cleaner and I believe they also contain zinc to help with the heavy loads imposed on the reciprocating parts of a Diesel engine. Cheers................Greg.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 85310, member: 597"] Hi there Alyn, I don't believe so, It is just a HPR 30 mineral. I have been using 20/50 weight oils in all older machines for many years with no bad effects. I only chose it for its zinc content, but even using it in my oil can which i use a lot, I could tell straight away that it was a much heavier oil. Probably fine in a brit parallel twin like a Norton or Triumph, but I think the drag is more obvious in a roller bearing crank especially with four bearings. I had almost convinced my self to go to coil ignition to help the problem, but it seems the thinner oil definitely allows the engine to spin over faster. I know Diesel oils keep the insides of an engine much cleaner and I believe they also contain zinc to help with the heavy loads imposed on the reciprocating parts of a Diesel engine. Cheers................Greg. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil Viscosity
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