SOHC.co.uk Forums > The Black Bomber Board
M10 DOME Cylinder NUTS HEX
cbxman:
--- Quote from: K2-K6 on November 17, 2023, 08:10:50 AM ---
--- Quote from: mo goldie on November 16, 2023, 11:29:32 PM ---are ok
what do you use in the Engine of a Black Bomber or should I say what's the best to use......... if there is such a thing Now ?
--- End quote ---
I feel there's good evidence (significant thread of discussion on here) to use a modern synthetic in these engine.
Concerns about camshaft longevity, supply to that location and the heat with consequent "clagging" in the high heat crankshaft oil passages, then coupled with oil pump type, all have the potential to be helped by one of these oil types.
No its not because its more slippery, but much more about consistency of viscosity and pace of flow given the architecture within it, that's in my view :)
--- End quote ---
Nigel,
Interesting about the oil....although this tread is in danger of massive drift!
Do the 250/350/360 engines fall into this synthetic oil category that you are suggesting. They are very similar as I understand. Can you pint me to the thread please.
Jerry
K2-K6:
It's this one Jerry http://www.sohc.co.uk/index.php/topic,14515.0.html there's some intriguing and very in depth record from Jensen in running his 450 over extended period.
I do think the twins generally are in the same category with regard to oil, yes.
Bryanj:
Probably because early twins were all roller big ends not shells
cbxman:
--- Quote from: K2-K6 on November 17, 2023, 09:06:23 AM ---It's this one Jerry http://www.sohc.co.uk/index.php/topic,14515.0.html there's some intriguing and very in depth record from Jensen in running his 450 over extended period.
I do think the twins generally are in the same category with regard to oil, yes.
--- End quote ---
Nigel,
That was a long read and some of the stuff went in, but some went through!
The thread is quite old from 2017. Just wonder what the outcome was....or did I miss a link.
I do know that when I tried a 10/40 on my CBX many years ago. I had to drain it fairly quickly as to use someone's quote, it was making a bid for freedom out of every seal/gasket. Returned to dino and it all dried up. Some comment on using it with new seals and gaskets only makes sense on rebuild though.
Cheers,
Jerry
Oddjob:
"Returned to Dino" Love that quote, so descriptive.
Lots of comments about leakage using fully synth in old machinery, semi less leakage but is it worth the risk? Might as well stay with Dino oil until it's not practical anymore IMO.
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