I have my car from new and have clocked up 17 200 miles. The past oil changes were done by the dealerships and I have to assume they did not use the expensive oil. So, is a change over to, say, Mobil-1 at this stage too risky, or is it OK? If it is almost risk-free, naturally my next question is where can one source Mobil-1 cheaply?
I read the hype put out by Amsoil. It seems it is fairly convincing that the Amsoil Synthetic Oil is superior than Mobil-1 (both of 0W-40). But then, Amsoil is so much more expensive. Does any one here use Amsoil? And, if so what benefits have you seen with this hard to come by (in the UK) engine oil?