Join Date: Nov 2010
Location: United Arab Emirates
While I dont dispute the 'High Mileage Oils' might be good/better, some of it is a marketing ploy by the oil companies, after all, they aren't in it for the charity, but they do need to maintain some integrity.
The reason i PREFER (<---- not a recommendation) to use a higher viscosity oil is simply for the reasons I stated above about the tolerances on older engines, coupled with the fact that we live in a hot climate, and the low temperature viscosity requirements of the oil is negated, but the high temp requirements are critical.
I have not noted higher temps of the engine with the thicker oil, but it seems to run a lot smoother. The water temp and oil temp/pressure guages may not show minor differences, so my deduction is not conclusive....
What I DO know is that the engine is old, built on lower tolerances and does not like heat build up, as such, I throw Castrol Edge 20W60 in it, and she purrrrs (apart from the clattery valve lash which is currently being attended to). :-)
I dont know what Gargash uses, but I believe it is Valvoline...they dont stock Selenia, or if they do, the dont sell it in retail packs....