Thanks for posting great info Falcon_LS. Learned something. What was posted on the oil fill cap on the vehicles you are referencing?
I know for a fact there's Dexos1 on it, but I can't remember if there was a viscosity printed on the cap. It wouldn't surprise me if it says 0W-20 though; I don't see GM making special oil fill caps for the Middle East. Ford didn't back in 2001, when they switched all Modular V8s to 5W-20. Middle East dealers got TSB to continue using 10W-30, which was also recommended in the supplemental service manual.
Unlike GM, Ford did not print separate manuals for export, which was stupid. The English language version was basically what was available in the United States, along with a regional version translated and printed in Arabic. Then you had two supplemental service manuals in English and Arabic, contradicting recommendations in the owner's manual, causing a lot of confusion.
Going back to the 2000's, a lot of export GM vehicles had viscosity/temperature charts in their owners manuals, ranging from 0W-30 to 20W-50 based on anticipated ambient temperatures. This was when dealers used 20W-50 as service fill. ACEA A3 was generally the recommended specification, allowing you to use API SL in a pinch, but no mention or recommendation of ILSAC, 6094M and 4718M. Oil caps back then had 5W-30 on them, no different than USDM vehicles.
Nice information and description of the severe duty in the ME and the service recomendations. I like that they run out the filters to zero on the OLM.
Glad it was helpful!
Many folks still follow the old 5,000 km/3,000 mile rule, although instead of 3 months, they change oil every month if they don't drive that much. Others, who are more technically minded, follow the OLM and do additional oil changes in between, which is what I do personally. Those using synthetics often do a drain and refill once the OLM hits 50%, while others running conventional do a drain and refill every 25%. Regular oil changes, even without the filter, are essential here because of fuel and air quality.