i have been using shell helix ultra fully synthetic bought from tesco for rm99 a bottle (4L). usually bought 2-3 bottles everytime. been using for the past 70k+ km. better power compared to petronas oil. so far i am satisfied with shell ultra helix from tesco... save me rm100 from normal price.

20W50 fully syn? i think fully syn should be 0W or 5W... need to look up in wiki.. as far as i know... 0W-5W fully syn, 10W-15W semi-syn and 20W mineral multigrade thats why ur like under power... fully syn will be the thinnest while 20W will be the thickest (in 0W-20W range)

really need to look up regarding th oil

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Added on March 20, 2012, 12:04 amjust checked mobil website.... mobil 1 20W-50 full syn is for motorcycle engine

This post has been edited by mdnurman: Mar 20 2012, 12:04 AM