Quote:
Originally Posted by v50inred
You also need to consider that if a large oil company like Mobil are happy it meets the specifications for the engine then it probably does.
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True, but it's Volvo not Mobil who are offering the warranty and they are perfectly within their rights to refuse a warranty claim if you have not used a product that meets their specification.
Quote:
Originally Posted by v50inred
There is no such thing as an engine that only works on Castrol 0w30 A5/B5.
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True again and as Ninja said nobody says there is. No manufacturer can specify another manufacturer's products be used. They can specify an industry standard which they have in this case 0w30 A5/B5.
I've never really like Castrol that much, but use in in my D5 because it is the right oil.