Originally Posted by vroooom ptssssh
so its a toss up between:
15/50 mobile 1
SILKOLENE PRO S 10/50
Millers 10W60
Originally Posted by SafeChav
Tapping shows that something has worn past tolerance, oil is there to lubricate, NOT sound deaden
Correct yes, BUT if the oil is too thin, then it does make the tappets 'tappety'
15W40 isn't any thicker than 5W40 once it's warmed up. 5W40 is only thinner when it's cold and therefore reaches all parts of the engine faster after a cold start.