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Re: What Oil?
bwest- any Honda motorcycle dealer should have it on the shelf. I run Honda Pro (black bottles) 10w/40 and 20w/50 and have about 2000 hours between 2 Rotax 912 and 912S engines with no problems. The Honda Pro does have gearbox lubrication additives. I do run 100% 100LL AV-Gas so I can't use a full synthetic oil.
Also Kitfox Aircraft now carries the new AeroShell Sport Plus 4 oil that meets or exceeds all of the Rotax 4-stroke requirements. Page 40 of their parts catalog.
$86.00 a case of 12. I'm thinking of switching to AeroShell Sport Plus 4 after I run through my present inventory of Honda Pro oil.
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Re: What Oil?
I too switched to Aeroshell Sport plus 4. Another nice thing about it is you can use it with either mo gas or avgas. So on a trip with no mogas available use avgas with no concerns about oil type.
Dick