What is the best engine oil for a Ford Focus RS?

I recently bought a Ford Focus RS and I'm wondering what type of engine oil I should be using. I've heard mixed opinions on whether to use fully synthetic or semi-synthetic. Can someone with experience give me some advice on what oil would provide the best performance and protection for my engine?

I highly recommend using a fully synthetic oil for your Ford Focus RS. It provides better protection and performance for high-performance engines like the one in the Focus RS.

I've been using Mobil 1 full synthetic oil in my Focus RS for years and haven't had any issues with it. It's a great choice for this car.

I personally use Royal Purple synthetic oil in my Focus RS and have noticed a significant improvement in engine performance and fuel efficiency. Definitely worth the extra cost.