changed my opinion on oil other last couple days,here is what i mean,all the subarus i have had i have always used shell helix and was happy with it,when i bought this blobeye i gave it a oil change as i do with all my car so i no its done,so the oil as been in about 2 weeks now,today i was finishing doing my gauges and i was going to use a sandwich plate for oil sensors but not now,diffrent story that,but any way i decided to change oil again but try something diffrent,so decided on castrol magnetec 5w/30w 5A fully synthetic and have to say what a diffrence it has made,when your under bonnet the car sounds quieter and much smoother and when driving it seams much smoother,before if i was coasting down hill in 3rd at about 3000rpm the car sounded rough no it sounds nice no bad sounding noises and even the noises from the turbo which i was told was the turbo on its way out have gone,car picks up lovely now,the big test will be in 2 week when i change oil again to see if their is a diffrence in the condition of the oil to the 2 weeks runing shell helix which was black when i drained it,so will let you no in 2 weeks.oh and the magnetec was cheaper to buy