SOHC.co.uk Forums > CB750

Which Engine Oil should I use ?

<< < (9/10) > >>

Green1:
Doesn't Honda say 20w 50 for the 750.  ;)

I do run both the 550 & 750 on Semi 10w 40

K2-K6:
The viscosity for all of these Honda engines is 30 when hot, and most other petrol engines from the 1960s until well into this century.

All the multigrade specs do is cover ambient heat range.  As an example 0C degrees ambient would be served by 20w in Honda's own published data.  15w will take you down to minus 5C and 10w will get you down to about minus 15C.

The "w" viscosity (well I don't think it's eventually viscosity at all,  more the ability to crank the engine at a certain temperature at starting speed) and the hot viscosity are nothing like the same measurement so that when you delve deeper it all gets quite weird.

As already stated though,  oil condition trumps virtually everything on these engines.  It really has no impact what the oil costs originally if it's diluted/contaminated to a point it doesn't maintain component separation.

Trigger:
You old boys worry toooo much. A change is the most important thing, I can't tell you what i use, its a Trade secret ;) . W stands for Winter  ;D ;D ;D

Green1:
I thought W was for wallpaper paste Iv been adding 10% to 40% oil  ;D ;D

Trigger:
Yours sounds like it is running on wallpaper paste  ;D ;D

Navigation

[0] Message Index

[#] Next page

[*] Previous page