Not sure why there is so much discussion over this, it will be 100% ok, a lot of cars start life at one grade then dealer revises it later on, the vw pd engines started off at 10w40 semi synthetic for example, this revision in a lot of cases due to links with oil suppliers etc,if the car is under factory warranty then better stick to dealer service etc, the dealers have trading deals with certain oil companies etc, the dealers/garages are ONLY interested in the revenue generated in the workshop, after almost 30 years in the motor trade I can guarantee that is the case, servicing generates a regular revenue stream with the bonus of hitting you for the hard sell, brake discs, pads, suspension bushes etc which in most case would last a lot longer………
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