Again put in some Mobil 1 Super S semi synthetic 10W40 oil and swapped the old oil filter for a new halfords one. This time tried some new stuff, Wynns Hydraulic Valve Lifter Treatment, supposedly cleans out the tappets and various engine components and also aids with engine noise.
Initial thoughts were that it had quietened the engine down a bit, runs smooth so seems good so far.
Stuff used
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