SOHC.co.uk Forums > CB750

should I use synthetic oil in my 750?

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1884dale:
i have heard not to run synthetic oil in these old bikes (i have a k8)  is that true?

Dave M:
It's too good for them.

They were designed to run on good old 10/40 with frequent oil changes and that's what I use in mine and it's fine even after 30 years.

Whether synthetic would do any damage I don't know but I'm sure there's someone on here who knows...

hector2800:
Didn't help my f2 much so I would stick with the 10/40 as recommended

Bryanj:
Not worth the cost as you still have to change it every 1500 miles

1884dale:
thanks for the help

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