Quote:
Originally Posted by Dancake
Volvo doesn't make their own engine oil, so you'd expect the companies who do make engine oil to know a lot more about its capabilities. Send an email to Castrol asking them what oil they recommend for the D5 engine. Volvo recommends Castrol oil, but Castrol will tell you to use a different oil to Volvos' recommendation of 0W/30 A5/B5 because of its inability to properly protect the D5 engine.
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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 .