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...
lineaway Posted December 28, 2022 Report Share Posted December 28, 2022 Always ran ATF in my Beta`s for the last 32 years. The lighter, the better due to clutch action. Quote Link to comment Share on other sites More sharing options...
lsv Posted December 29, 2022 Report Share Posted December 29, 2022 On 12/28/2022 at 9:14 AM, McTrucky said: Pretty sure it is easy to over think such things Spot on................ 1 Quote Link to comment Share on other sites More sharing options...
totty79 Posted December 29, 2022 Report Share Posted December 29, 2022 Might as well try the Shell since you've got it. It's partly a matter of preference with how the clutch feels. If you get to much drag with the Shell then Putoline Nano Trans, Motul 300v and ATF all get recommended, I've tried all three and prefer to use Nano Trans in my 2012 250. Quote Link to comment Share on other sites More sharing options...
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