Is Dexos 2 oil necessary

[andyp]

Thanks for your reply, but the thing is, how do I know if it meets Dexos spec, also does it have to meet the actual Dexos spec, which might be a higher spec but not essential if I am doing 10,000 mile oil changes

Hi I allways change the oil once a year no matter what mileage or what Vauxhall say for what it costs its worth the piece of mind, as for oil spec if you have the owners manual see page 254/255 258 all oils have a acea or api code on them