What is the most efficient oil for a Vauxhall Combo Life?

I recently purchased a Vauxhall Combo Life and I'm curious to know which type of oil is the best for prolonging the life of my engine and improving overall efficiency. I've heard different opinions from various mechanics and I'm not sure who to trust. Can someone with experience and knowledge on this subject provide some insight and personal advice?

I have been a mechanic for over 10 years and I would recommend using a synthetic blend oil. It provides better protection and lasts longer compared to regular oil. Fully synthetic is also a good option but it can be quite expensive.

After owning different types of cars, including a Vauxhall Combo Life, I've found that using high mileage oil is the best choice. It's specifically designed for older engines and offers better protection against wear and tear.

As an avid car enthusiast and owner of a Vauxhall Combo Life myself, I highly recommend using a full synthetic oil. It may cost a bit more but in the long run, it will save you money by reducing engine wear and improving fuel efficiency.