McTrucky Posted December 28, 2022 Report Share Posted December 28, 2022 On searching for "what oil...?" I expected a raft of opinions and an equal number of "not this again..!" responses. But alas no. So here goes... The manual says Bradahl 20w40. I have tubs of Shell Ultra 4t 10w40 (fully synthetic, top of the range shell bike oil) - is there any reason not to use the Shell? Hot viscosity will be as recommended, cold viscosity slightly thinner than the 20w40, but that is probably a good thing for cold starting. I can understand the logic of using a gearbox oil rather than an engine oil (such as no compromises for catalytic converters etc), but the manual does specify a multigrade. Pretty sure it is easy to over think such things, but any opinions on this? Quote Link to comment Share on other sites More sharing options...
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