What is the recommended oil viscosity for a Ford Puma?

I just purchased a used Ford Puma and I was wondering what oil viscosity is recommended for the best performance and engine protection? The manual only states 5W-30, but I have heard conflicting opinions from different mechanics. Can anyone provide some insight?

I have been using 5W-30 for my Ford Puma and it has been running smoothly for years. Stick with the manual's recommendation.

I recommend using a slightly thicker oil like 10W-30 for better protection, especially if you live in a warmer climate.