Can someone please confirm that the correct oil for a 2004 Fiesta 1.4 Duratec EFI DOHC 75PS is 5W30? I checked this enough times and when he took it they told him they put 10W40 in it and were saying that 5W30 is the wrong type of oil. I am sure it is 5W30 semi synth that the zetecs and duratecs need and the fact that they put 10W40 will end up resulting in sticky valves