Fully syn is worth if u use ur car everyday
For kapcai rider that use a car maybe once a mth, better use semi syn
Unless u got extra money to chg fully syn for every 5k km

Just now lazada flash sale Car Doctor fully synthetic RM15  (normal price RM69), did you get one?

This perception is a little dangerous. For branded semi synthetic, at least you can CONFIRM that it at least meet API spec. But for unbranded/cheapo full synthetic, you don't even know what type of oil that's filled in. Can fill recycled oil or normal mineral oil or whatever unknown blend but can just anyhow print label saying some kind of superior synthetic oil.

For branded ones, at least you have the assurance that they are not willing to mess up as it will affect their future business big time. If really got issue, can seek their technical team if you're willing to go the extra mile. Those cheapo/unbranded ones, can just produce 1 batch, then change label. No traceability. No saying that all cheapo synthetics are blended by crooks but just bear in mind that the risk is really high there.

Market price for oil nowdays not so expensive like we thought but the price eo for car rocketing high...

Who is controlling the price for engine oil in the market..?

I agree with you..have u before buy any eo from online site..example lazada?how about the packaging and ho wlong we have to wait for the parvel to arive?

will feel the difference in the fuel consumption.....

Even mazda's new car range also specify 10000km on hx7, what do you think? 
You missed out the most important one, tyre thread.

What car are you driving?

Normally, presumably timing belt type (chain type almost impossible to access), if setup properly initially, hardly need to touch it until time for next replacement.

Yes, there is difference.
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you can say most of the EO that provide wider range of protection at cold and running heat are full syn, but strictly speaking cold start viscosity got nothing to do with full syn / semi syn / mineral.

Full syn is generally more "stable" or slower to degrade/breakdown from its original condition when it was new.

lower number perform better during cold start.

only branded and full syn, i have two brand one is castrol edge for daily car and motul 8series for the car i push ....

Play safe. Just change once per year considering your very low mileage