OK, I’ve been using Mobil 0-40 fully synthetic in the 'P' car for years. Can I use it in my Fulvia 1600 instead of the recommended 10-40? I assume it should be just fine because it has an even wider viscosity range, but thought I should check with you experts, just in case.
Also, what do people use to bring back some lustre to hard black plastic parts, such as dash panels, that have oxidized. There seems to be huge controversy over whether the product should, or should not, contain silicone.
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