Quote:
Originally Posted by Clan
Volvo work with Castrol from the very start of the project on the dynamometer , extended running periods under full loads and conditions , stripping engines checking for wear etc , No volvo cant be expected to make engine oil but they now have their unique specification for their engines since 2015 (RBS0-2AE 0w-20 Fully Synthetic Engine Oil) anyway where are all these failed prematurely worn old D5 engines ? They will be the ones which have been using the wrong oil , neglected oil changes and on their 3rd or 4th owners .
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Why do you think vehicle manufacturers work with oil companies? Their obligation to protect the environment far outweighs their desire to obtain maximum engine life. It's not in their best interests to produce cars that can last 15 years+ or 200k miles+. Volvo like any other vehicle manufacturer are in the business of selling cars. Why would they want to squeeze every last mile out of their engines using premium oil that actually offers maximum engine protection? It's just not in their interests.
When Volvo are working with Castrol, they're trying to find a happy medium between lubricity, engine wear rates, exhaust emissions and engine efficiency. All of these factors need to be considered to satisfy Volvos legal team. They don't want engines failing during standard warranty periods, nor do they want an onslaught of dissatisfied customers complaining that the mpg is nothing near what was advertised at the time of purchase. Using such thin long life oils allows Volvo to satisfy their efficiency and environmental obligations, but at the expense of engine wear.
The point has been made before asking where all the failed D5 engines are that have been using the incorrect spec of oil. We would hardly hear about them on here, as the vast majority of Volvo owners aren't forum members. As reliable and sound as the older D5 engine is, it's simply a reciprocating amalgamation of metallic compounds that requires suitable lubrication to prevent wear, and thinner oils that have been manufactured to increase efficiency and reduce emissions are simply not the best choice when it comes to maximising engine protection. You can even hear the difference at tickover between an engine using 0W/30 and one using 5W/40. It's night and day.