Oil what type how much how much should I pay, very good questions.
Oil comes in various different grades and quantities, always ensure you check the correct grade that your vehicle should take and you use that in the vehicle or you could end up damaging the vehicle.
Semi synthetic, fully syntceltic just 2 differentypes other vehicles will require semi synthetic.
Your vehicle manual should be able to tell you the grade and quantity and type of oil you need please ensure you refer to your a qualified garage to get what you should use in the vehicle.
How often should you check the oil at least once a week would be my suggestion yeah it takes maybe 5 minutes but it could say you endless amounts of pounds fixing the vehicle.