How many miles before changing oil on ford fiesta (petrol) 1.2?

How many miles before changing oil on ford fiesta (petrol) 1.2? - 1

Normally every year.12,000 miles seem to be average mileage inbetween. But check on your service book ford are known to be a bit lower

Every 4 to 6k miles, under normal driving conditions.

Depends…
for non-synth oil 4k to 6k miles between changes…
for synthetic oil you can go MUCH longer (with the premium high end synth oil you can go up to 15k miles between changes)

Check you service manual or Ford's website. Here in the UK it would be 10,000 miles or so.