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Message: <blockquote data-quote="Schwepps" data-source="post: 375535" data-attributes="member: 3592">Yes, but specifically Syntium 3000 LL 5W-30, which again you can't buy in the Petronas stations. It's only supplied to dealers. You can buy 1l top-up bottles from the spare parts counters of any dealer to keep in the boot.If you absolutely need to mix, then mix with another fully synthetic. But here's the rub: what's labeled as fully synthetic out there on the shelves can actually be a highly refined mineral oil. Long discussions on this before. On whether you should top up, read this first:  <a href="http://www.ssht.com.au/sludge_lowres.pdf" target="_blank">http://www.ssht.com.au/sludge_lowres.pdf</a>A surprise visit from the sludge monsterYou may also be surprise to learn that running an engine running low on oil for a prolonged period can cause sludge. The detergent and oxidation inhibitors are important components of the additive package that prevent sludge from forming. When an engine is run low on oil, these additives have to work overtime to do their job. There is simply less of the additive package available to do the work of suspending particles and preventing oxidation (thickening) of the oil. Here is a surprising fact, running an engine just one litre low on oil for 55 hours can increase the viscosity of the oil by over 1000%. This is like running really, really, really thick oil in your car’s engine.</blockquote>