Hi, I want to use the 5w30 long life oil but dealers I have spoken to insist on using the 5w40. The car is used basically as a family used car, so it gets driven short distances within town and on weekends it is usually taken on dual carriages/ motorways and mileage wise the it does about 6-8k per annum.
So do you think I should just go with what the dealer says and using 5w40 or perhaps buying my own 5w30 quantum oil and providing them with this, I hope they dont get annoyed about it though
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