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what weight are you running?

10w40 would be the go, Gulf western oils are pretty detergent heavy so running some of that at 5000km intervals should eventually free it up

otherwise you can do what i did to my 31

4 litres of cheapy GW 20w50 (~$13)

2 x Nulon engine oil flush

Dump current oil (save it if you want and put it back in after)

Insert cheap oil + both oil flush bottles

Run for 5 mins at idle, do not drive it!!!

lift the revs to 2-3000 rpm for 20-30 seconds

idle for 5 mins

lift the revs

etc... do it so its running for around 20 mins

dump the flushing oil, change the filter, put new/previous oil back in

party

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Nulon make a tappet quieting product

The retail version is different to the one supplied to mechanics tho, if the 31 needs it I go to an ultra tune and ask them to get a bottle in for me, usually works out at about $10 anyway but the bottle says "not for retail sale" or something like that

Glad to hear you got it sorted tho

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