Exactly Max and this is the guy that I helped put his garage together when I was recouping from my damaged knees. I have tried to get him to wear clean overalls and use disposible gloves, clean handtowel etc but it now appears he cannot change. Not only that, but all old the Jap bikes I have ever owned use 10/40 semi sinth oil, even my little Honda CB250 which is 30 yrs old uses that oil!
But lets face it a mechanic is just that, replace broken bits with new bits, whats so hard about that. My background in engineering was to
make the bits that the mechanic replaced! So I generally take the mick when it comes to mechanics!
