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Message: <blockquote data-quote="yintk" data-source="post: 438754" data-attributes="member: 2876">Hi Loaf, thanks for sharing but at times I got a little bit puzzle of which one to use RON95/ 97 or even which brand to use when we reach a place where there is no RON,than would Petronas, Shell, Esso, Caltex as they had different grades and spec which would suits our engine, I suppose... Eg Petronas - go for XXX     Shell - go for XXX     Esso - go for XXX Knocking would be one of the cause, but what if we do not stick to one brand...wud tis also occur...Lets hear from Sifus' as I believe it would help us in maintaining our engine better...</blockquote>