I have been doing some searching but still am a little unsure to what oil to use!
This will be the 1st oil change iv done on the coupe, im also unsure what oil was used on its last change.
choices are semi syn 10w 40 (iv always used this in previous vauxs) or fully syn 5w 30, both are from vauxhall. my car has covered approx 45k if tis helps.
If fully syn was used previously is it ok to go back to a semi syn?
Id like to by the oil in the morning so quick replies invited!