Hello all,
My service contract on my 2012 Mazda CX-9 (3.7L V6) is over. Dealer used bulk Castro GTX conventional (5w-30) every 6 months or 6,000 miles (every 6 months...don't put too many miles on it). Car has 48,000 miles on it. Don't sit in a lot of traffic. Owner's manual has non synthetic oil OCI intervals. Question is...should I switch to Castrol Synthetic or (NAPA synthetic...is on sale now) and run 12,000 miles or 1 year OCIs?
Anyone have any advice on oil brand for this engine? Appreciate it.
My service contract on my 2012 Mazda CX-9 (3.7L V6) is over. Dealer used bulk Castro GTX conventional (5w-30) every 6 months or 6,000 miles (every 6 months...don't put too many miles on it). Car has 48,000 miles on it. Don't sit in a lot of traffic. Owner's manual has non synthetic oil OCI intervals. Question is...should I switch to Castrol Synthetic or (NAPA synthetic...is on sale now) and run 12,000 miles or 1 year OCIs?
Anyone have any advice on oil brand for this engine? Appreciate it.