whats the recommended mileage to change the oil on the 1.7ctdi astra 09 plate

imafisherman, June 2013

use full synthetic and change every 8000 miles, your engine will love it.

RM, July 2013

12 months or 20,000 miles whichever comes first.

However, I would never do 20,000 miles between oil and filter changes. An annual service is what I'd recommend, and no more than 10,000 miles before changing the engine oil and oil filter.

See
http://carleasingmadesimple.com/business-car-leasing/vauxhall/astra/service-interval-miles/

ChicksFan, June 2013