i ran 530 long life in my 1.8t to find i was using alot of oil and smoking, put it on 540 it got abit better, so went for 10.40 platinum semi and it doesnt use any, and you say cheap oil isnt poor? i have no clear proof but i all i can say is i ran my focus on cheap oil once it went black within no time then changed to proper stuff 5k later so it wasnt asif i the engine just got flushed through with the cheap stuff) ford oil which was £17 on trade and it took a good few months to go black .. why bother geting cheap crap when you can get genuine at the same price or just a quid or so more. if oil doesnt matter why dont f1 use morrisons finest ?