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<blockquote data-quote="acbc" data-source="post: 965541" data-attributes="member: 1619"><p>There is no absolute perfect way to get rid of the tappet noise. It is by design. After all, hydraulic tappets were technological wonders in the 70s n 80s. Even now, the latest Volks GTI (5th Gen) uses hydraulic tappets.</p><p></p><p>After going through various type of oils... the only conclusion is to follow Mitsu's recommendation... which is 20W50. I've tried thinner oils b4... as low as 0W30 n now using thicker 15W50. The thinner the oil, engine runs smoother and feels lighter but burns up faster (I had to top up every 2 weeks or 2000km - missing 1L) and costs more (OUCH!). With thicker oil, engine feels heavier n less responsive but maintainance cheaper (I only top 1L when reaching 4000km). I even tried addictives (Tufoil included) with thicker oil such as Motul 4100 Power 15W/50 but makes no diff except some minor (less than 2% fuel savings - yes, my right foot is kinda heavy, mostly 70% on throttle)</p><p></p><p>After 2 months of using Motul, the tappet noise went away and only comes back when it is time to top up (almost reaching 4000km).</p></blockquote><p></p>
[QUOTE="acbc, post: 965541, member: 1619"] There is no absolute perfect way to get rid of the tappet noise. It is by design. After all, hydraulic tappets were technological wonders in the 70s n 80s. Even now, the latest Volks GTI (5th Gen) uses hydraulic tappets. After going through various type of oils... the only conclusion is to follow Mitsu's recommendation... which is 20W50. I've tried thinner oils b4... as low as 0W30 n now using thicker 15W50. The thinner the oil, engine runs smoother and feels lighter but burns up faster (I had to top up every 2 weeks or 2000km - missing 1L) and costs more (OUCH!). With thicker oil, engine feels heavier n less responsive but maintainance cheaper (I only top 1L when reaching 4000km). I even tried addictives (Tufoil included) with thicker oil such as Motul 4100 Power 15W/50 but makes no diff except some minor (less than 2% fuel savings - yes, my right foot is kinda heavy, mostly 70% on throttle) After 2 months of using Motul, the tappet noise went away and only comes back when it is time to top up (almost reaching 4000km). [/QUOTE]
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