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Quote from: Trigger on November 30, 2016, 07:41:42 PM.... as long as it is to the right spec, I am happy.Trigger, I think you could have unwittingly struck the metallic pin squarely on the cranium here.What is the right spec? Oils have changed vastly since the bikes were new 40+ years ago.The original specifications for my 400/4 call for an SAE 10W-40 oil of Service SE Grade. Nowadays this is referred to as the API specification; in 1977 SE was the highest specification available. My understanding is that within reason the later higher specifications supersede the earlier ones.The Millers oil I referred to has a 'Performance Profile' of API: SG, SH, SJ and JASO: MA / MA2. The JASO classifications seem to be for motorcycle-specific oils. The Millers oil is suitable for off-road, on-road and track motorbikes, and is for use in motorbikes fitted with oil immersed 'wet' clutches. I am happy it is right for my bike.If I look at the Triple QX oil in Greebo's link I see it is classified A3 B3 B4. These specifications are for car and light van petrol and diesel engines. They may be perfectly suitable for use in bike engines but I can't link between the different sets of standards.So my choice is to stick with a motorcycle-specific oil. It doesn't cost me a great deal more, and as I only run the one bike the difference isn't multiplied several times. as it would be for others on here.So, bottom line (literally), what standard/specification would you be looking for in your 'Trade' oil?
.... as long as it is to the right spec, I am happy.
So there doesn't seem to be a definitive answer as to which is the best oil for the cb750, should we use part synthetic or non synthetic, premium priced or economy, i'm just as confused now as when i first started to read this thread , and i was hoping there was a consensus as to the best oil to use,
Quote from: adespin on August 06, 2018, 07:16:45 PM So there doesn't seem to be a definitive answer as to which is the best oil for the cb750, should we use part synthetic or non synthetic, premium priced or economy, i'm just as confused now as when i first started to read this thread , and i was hoping there was a consensus as to the best oil to use,You will get at least 28 different answers on what oil to use and at least 100 different reasons why to use a certain type. We use Trade Tec Premium 10w40 Mineral and Trade Tec Premium 10w40 semi synthetic, not mixed together !!. Its as cheap as chips but does the job just fine. We find both are good, the mineral needs changing every 1000 miles, the semi, yearly. It is the frequency of changing the oil that saves these engines. Expensive motorcycle engine specific oil is a waste of money, its just oil companies advertising their wares hoping that motorcycle riding muppets will fall for it.