Does anyone have any advice please? I've recently bought an 05 Astra SRI 1.7Cdti x pack (love it!), and there seems to be a 'pinking' noise from the engine when going uphill, or if labouring slighty. Does anyone know what this could be? Also, when I first start it in a morning there is a loud rattle from the right hand side of the engine for a few minutes (I know it's a diesel and it's supposed to rattle but this is not normal engine noise.) Any ideas anyone?
Also, I'm having an oil change this week, any ideas on the best type of oil to put in, I do quite a bit of mileage each week.