cheapest name brand synthetic and a K&N/mobil filter.
Repeat every 10 000 KM.
10 000km=6000miles (aprox)? .....I don't know if I'm "over protecting" my car, but it has now 190,000 miles and I'm starting to change the oil every 2500 instead of 3000 miles because I see that my oil starts getting a little dirty at 2000