Hi, Interesting topic, and in our hot climate in the UAE, I would go for a full synthetic oil every time. However, some synthetic formulations are not miscible with mineral oil (or other types of synthetic oil), so make sure the label says it is miscible with mineral oil. The problem involves the raw materials the synthetic oil is made from. As a general rule, synthetics that are condensed out of methane and carbon monoxide are safe to use, since they can be mixed with almost any other oil, but some newer formulations don't mix with anything, which means that you will end up with something that looks like Jello, which will destroy your engine. Synthetic oil has the advantage that all the molecules are exactly the same size, which means that in practice, all the valleys and peaks (known as asperities) in the wear surfaces in your engine hold more oil. Thus, your piston rings have a bigger supply of oil, and since all the molecules are the same size, the entire cylinder wall surface area receives up to twice the amount of lubrication a mineral oil can supply. In addition, synthetic oil is much more thermally stable than any mineral oil. All this means is the the viscosity of the oil, which is the oil's resisance to flow, is more uniform during the entire temperature range of the engine. I am not too sure about all the available brands of oil in the UAE, but any oil that carries both the ASE, and European Auto Makers' Association seal of approval will work- provided it states on the label that it can be mixed with other oils.