Now that my Astra Sporthatch 1.9 CDTi has done nearly 7000 miles I think its time to change the oil......
The question I have is what oil to use.....I am pretty useless when it comes to this and the last thing I wanna do is put the wrong oil in......lol
The service book says its comes with 5w-40 as standard. Is this fully synthetic? Is fully synthetic better?
Cheers for your help