Price of fully-syns vary greatly, from RM80/4L for Bardahl 5W-40 to RM200/2L for Motul 300V! But most of them are in the RM130~160/4L range.

Motul stuff has good feedbacks, that's probably why it sells quite $$$, due to better quality.

U can get Mobil 1 stuff cheaper from me, ~ RM150-160/4 quarts

To me, a brand means a certain level of quality. Like for a famous brand, even if the product is not the best in quality, it is at least of a certain acceptable level. Less famous brands can be of better quality than established, bigger brands too, just maybe not as often.

Wah, Torco lubes, $$$ stuff!

Yes, even locally, I know BMW & Peugeot recommend around 20k km/1-yr oil-change intervals, whichever comes first. European manufacturers emphasise a lot on minimising waste oil and pollution.

10k km/6 mths, whichever comes first lor.

Hey, how come no supporter of the "nonid change oil one, mechanic cheat money oni, just top up oil when level is low enuf adi" here ha?

I know that some turbo car owners just use some cheap semi-syn that they can get their hands on, as the oil will be evaporated easily, so, no point wasting their $ on $$$ fully-syn oil. Frequent top-up is probably also needed.

NA means naturally aspirated, no forced induction like turbocharging or supercharging.

That's what the spare part shop staff and mechanics have been telling me too! But I still use it w/o any problem.

It depends on the condition of yr engine, if it's good then it's possible that you can use ?W-30. What viscosity oil are u using now? Let's say you're using ?W-40 now and there's no noticeable oil consumption, then u can try ?W-30 and monitor the oil level. If there's still no oil consumption, then yr engine is in good condition and suitable for ?W-30 grade oil.

Lube technology has advanced a lot over the years, so now, even ?W-30 can withstand heat better. FYI Honda SC also uses ?W-30 oil on the new Accords (2.0 & 2.4L), according to my mechanic friend working for them.

Lighter oil actually make pumping them around the engine easier, so the power losses is reduced, and in some cases, FC may improve slightly.

You can't really tell whether an oil is mineral, semi- or fully-syn from the viscosity rating alone... maybe except those 0W-? ones, which I haven't seen any mineral ones. We need to read the label to know whether it's mineral, semi- or fully-syn.

Just afraid that the overwhelming amount of info may confuse more than inform!