Just change all tyres to EP 200, RM155 per donut for 175 65 R14 after some bargain. So far notice my RPM slightly drop esp running at highway as compare before (2900Rpm vs 3000 rpm @ 110kph), which suspect will give some fuel saving in long run.

As noise, quite noticeable above 80kph for me but is still okay.

I still new on this, but the observation are true for me. Might be the tyre slippage as my old tyre really in bad condition - almost lose control while driving in wet condition which is the main reason I change all tyre @@