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Engine oil

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adrian58:
Looking to change the oil on my K2 soon and was wondering whats the best. Stick with mineral or go for full/semi synthetic. I know I put semi in my old Beema and it went straight past the rings, but kinda like the thought of engine being better protected with newer oil technology. Any thoughts experiences ?

Seamus:
Whole can of worms there. Everyone and their dog has a view. Believe it has been done a few times before. I tended to use a 20/50 oil as recommended and change frequently. Halfords 20/50 or morris or any other classic oil would be fine.

Bitsa (Ralph Wright - RIP):
Agree with Seamus.They were designed in a time when engine oils were of  that caliba.
Cheers
Bitsa

Lobo:
Agreed with above... only because my neighbour is an AA retiree, having done 33 yrs with them in their Tec / training department, and owns both a Douglas Classic + modern Triumph.

He recommends to stick with what the machines were designed to use, and pointed me to a Halfords 'Classic Oil' for my '750K2 - basically re-labelled good old Duckhams 20/50 Green stuff. If you change it often in accordance with the manual you presumably can't go wrong....

 This message will self destruct in....(!)

K2-K6:
It's funny that everyone has quite a strong opinion about it.

I'd hold with the the others in that if you use oil of the type originally intended, you're unlikely to run into problems.....but can see your point of synthetic potentially offering an advantage.

One thing that is very clear to me is when looking at problems in engines related to oil, then by far the biggest I've come across is dillution with petrol on air cooled motors from too much running on choke...I think this is far more of a risk than the oil you choose......so if you do many short runs or start and no riding then you need to be very diligent in looking after oil changes.

Some of these engines have done very high mileage on original type oil, so it's clearly not the oil spec that is in any real way questionable.

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