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Here in Europe engine oil is typically always multi-grade, and often fully synthetic. I believe this is because standards are stricter here (although I can't fi

Here in Europe engine oil is typically always multi-grade, and often fully synthetic. I believe this is because standards are stricter here (although I can't find anything confirming this), and synthetic oil often leads to engines lasting longer and lower emissions. This is why manufacturers have different recommendations for Europe. The formula of the oil is completely different to the US, so it can stay in the engine a lot longer.

bluGill 9y ago
> synthetic oil often leads to engines lasting longer This is true in theory, but for most people the rest of the car will fall apart before the engine dies. All the rubber and plastic is degraded by air and sunlight which has little to do with any use patterns. (there are of course uses that put more wear on them as well) A good portion of the cars are junked with so little use that they would have made it that far without any oil changes at all. Of course the oil would be like syrup, and the engine would show other signs of the abuse, but it would still be running well enough to make that last trip before the car is destroyed for other reasons.