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Which Engine Oil should I use ?

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Chris400F:

--- Quote from: Trigger on November 30, 2016, 07:41:42 PM ---.... as long as it is to the right spec, I am happy.

--- End quote ---
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?

Bryanj:
Considering the service change of 1500 miles, when i also think the filter should be changed, there is no need for the extra expense of the "modern" motorcycle" oils which even the manufacturers like Fuchs admit to being standard oils in a more expensive can

MrDavo:
Nowt wrong with Nike trainers, Trigger. I have got through 2 pairs of black Nike Air trainers, wearing them almost every day, in nearly 20 years.

The first pair went round the world, up Vesuvius and Sydney Harbour bridge, inside the Great Pyramid at Giza, and are now the 'garage' pair though one of the soles is hanging off a bit, nothing Evostick wouldn't fix.

The second pair the wife got me for Xmas a couple of years ago, she quailed at the price, but admits no present she has ever bought me before or since gets used almost every day. I do (almost always) wear boots on the bike, though, seen a few shredded feet over the years.

As for oil, in the CB750 I use the straight forward 20/50 dinosaur oil the bike was designed for, as others have said it's not in long enough for modern witchcraft to make a difference. However why are the intervals so short? Heat in an aircooled engine, or design?

My 911 is air cooled, and that gets 12,000 miles per oil change according to my handbook (though I do it a damn sight more often than that). Apparently if you use modern fully synthetic oil it will pour out of oil seals that weren't designed to contain anything so slippery.

I thought I was saving money on the Harley by ignoring the bullcrap marketing ads that tell you only to use the expensive Genuine H-D oil and nothing else (oddly, it says in the manual to use oil designed for a diesel at a pinch, maybe it's a detergent thing) I used any old multigrade, but did change it at regular intervals. Then at 23k miles the ground and hardened bearing surface of the crankpin turned to glitter. :o It gets the real thing again now, I have other cranks to change. :)

 A wise man told me many years ago 'oil is cheaper than bearings'.

Trigger:

--- Quote from: Bryanj on December 01, 2016, 03:42:51 PM ---Considering the service change of 1500 miles, when i also think the filter should be changed, there is no need for the extra expense of the "modern" motorcycle" oils which even the manufacturers like Fuchs admit to being standard oils in a more expensive can

--- End quote ---

Are you telling me Bryan, that those 1 ltr bottles you see in dealerships on the top self at £12 is the same grade that comes in those 205 ltr blue drums is the same stuff. Well I never   ;D ;D ;D

Now it looks like the Great oil debate has moved on to the Great foot wear debate  :)

K2-K6:
That expensive stuff in lovely bottles isn't up there on the top shelf for nothing, pure oil porn, the luscious golden little beauty. ;)

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