SOHC.co.uk Forums > CB750

Which oil

(1/3) > >>

Pauarc:
Has anybody put putoline s4 mineral oil 10w40 in their CB750k2 as bike seam to be noisy compared with motul 10w40 or is it me

McCabe-Thiele (Ted):
When I had oil changes in my various cars they all seemed noisier after an oil change (probably as the old oil had thickened) with just one exception - that was when a local service garage started using Total MC 5w/30 synthetic Oil - it was ultra quiet but quite expensive.

It has mentioned here previously about high Zinc oils for the 750.

Pauarc:
They do this oil in 10w40 or 20w50 westway oil

McCabe-Thiele (Ted):
I suspect you need the high ZDPP like below - others here will know better than me.

.https://www.westwayoils.co.uk/products/10w40-mineral-classic-oil-high-zinc-zddp

K2-K6:

--- Quote from: Pauarc on July 18, 2023, 04:45:59 PM ---They do this oil in 10w40 or 20w50 westway oil

--- End quote ---

The 10W40 should be fine for these engine as it states 1100ppm zinc content.

The high zinc is focused on flat tappet cam type valve gear which these Honda engines don't use.

Flat tappet arrangements have (using American V8 type as example ) circular tappet face, usually ground slightly convex, and or skew grind on camshaft lobe that causes the tappet assembly to "walk" round incrementally from each hit with the cam. It's a swingeing regime for oil to undergo with a high pressure and skewed skurfing action, hence the particular focus from those users on this oil aspect. High mileage with inadequate oil specification usually has them ground out into quite significant concave pattern on tappet surface.

These Honda on std cam etc don't need those elevated levels to be OK.

Navigation

[0] Message Index

[#] Next page