try checking the valve clearence, on the 1.3 turbo the inlet should be 0.35 to 0.45 mm and exhaust 0.45 to 0.55 mm
Can you adjust them?
There engines are quite tappy sounding. The injectors can be noisy, sounding like loose tappets
nice quality oil, i use a semi synth 10/50, works well, maybe stick an additive when topping oil up after, i seem to do, Ant!