As mentioned in a couple of previous threads I changed to Mobil 1 10w 30 full synthetic oil. The car was put on full synthetic Mobil 1 at about 2k (I was late getting my 1st service). The car now has 75k & is running as good as ever, I did over a thousand km's over the weekend & got about 7.28 litres per 100km for the trip. The engine uses no oil, the oil is always clean at oil change. I have no issue with using a fully synthetic oil. my local dealers FEO oil is blended by Caltex. I think it depends on your state & the dealers choice as to what oil they use at service.
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