Booking on price alone
A quote well below the market range for a genuine synthetic is not a bargain, it is a disclosure. The savings usually come from decanted or counterfeit oil, an unlicensed operator with no insurance, or waste oil that will never see a licensed collector. Compare like-for-like itemised quotes and let the outlier go.
Running marketing intervals in severe-duty conditions
The 10,000-kilometre synthetic interval assumes gentle conditions UAE driving does not resemble. Heat, dust, idling and short trips are the textbook severe-duty profile, and stretching intervals here is the slowest, most expensive way to discover what sludge does to a modern engine.
Upgrading to thicker oil because it is hot
The instinct that 45-degree summers need heavier oil is decades out of date for modern engines, which rely on precise flow through tight clearances and variable valve timing. Going thicker than the manual permits can starve exactly the components the heat threatens; the GCC specification already accounts for the climate.