Hi all,I have just purchaced a Astra 1.7 Diesel CTDI 2004 mark 5 which has a full service history for my daughter whick has covered 90,0000 miles, it has been well looked after as I know the previous owner.
I am about to give it the once over and an oil change and see that Vauxhall recomends Sinthetic oil for this engine , The previous owner thinks it was a Semi -Sinthetic oil used in the service previous.
My question is If Semi -Sinthetic oil had been used previously will it be ok to run the car on Fully Sinthetic oil ?
My local auto shop have offered me AC Delco oil 5-40 . at a price of £18 per 5l which I thought was very cheep !
Has anyone used this type of oil and how did they find it ?