SOHC.co.uk Forums > CB350/400

Engine oil

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Bodd:
I'm now at the stage of filling up my engine with oil so decided to do a little research about what the best oil is to use, as far as it goes I know nothing about oil types and properties and usually use the manufacturer's recommendation which my research tells me is 3.5 litres of 10w 40 mineral oil, but I have seen elsewhere and also on this forum 15w 40 diesel oil from Tesco (Carlube) being recommended, can anyone shed any light on this ? I have read this article but past experience tells me other people's experience will give me a better idea.

matthewmosse:
I just cleared the shelf at our Tesco of that particular oil, they had it reduced to £2 a bottle (2l) from £8.

Bodd:
They have 4.55L for £12 but is it the oil to use in my bike ?

Dan:
I've always been under the impression that you should use bike specific oil as it is formulated to withstand the shearing effects of also lubricating the gearbox.  I use Rock Oil Gamma 10W 40, but it's a bit dearer than Carlube diesel oil.

I'm guessing you can get away with using car oil if you change it frequently?

Bryanj:
The Tesco stuff has exactly the same sae spec as the original requirements, and being for diesels has additives ideal for the gearbox. The original change interval of 1500 miles also takes account of the gearbox use. Personally I always change both oil and filter every time as I don't believe in putting clean oil through a dirty filter and if you buy a few at a time they ain't expensive

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