I have a 2010 Cadillac CTS 3.6L. OEM oil is Mobil 1 5W-30, says so in the manual and on the cap. Brought it to Cadillac dealer assuming they would put Mobil 1 in. Reading invoice after the fact, it said, "dexos syn blend oil." Presumably it was GM's own ACDelco. Dealer said that was now the recommended oil.
I called another Cadillac dealer and asked what they would put in and he said Mobil 1 and that the dexos syn blend was a money saving alternative ($60 vs $80).
While I understand that dexos is fine, I want what's best, not just OK. Intuitively, it seems to me that fully synthetic Mobil 1 is better than GM's syn blend. On the other hand, if they're equal, wouldn't mind saving a few dollars either. Interestingly, if that same 3.6L engine is in a Chevy or a Buick, it did not call for Mobil 1 in 2010. Any thoughts out there?
Second question. I drive low miles, maybe 5,000 per year. When I hit the one year mark, the OLM still said I had about 70% life left but I changed it anyway at about 2,000 miles (first oil change). Any other recommendations other than changing it yearly regardless of OLM life left? Same for Mobile 1 or dexos syn blend?
In my low mileage cars (2k-3k per year) with conventional oil, I change every six months. Is that OK? Thank you.
I called another Cadillac dealer and asked what they would put in and he said Mobil 1 and that the dexos syn blend was a money saving alternative ($60 vs $80).
While I understand that dexos is fine, I want what's best, not just OK. Intuitively, it seems to me that fully synthetic Mobil 1 is better than GM's syn blend. On the other hand, if they're equal, wouldn't mind saving a few dollars either. Interestingly, if that same 3.6L engine is in a Chevy or a Buick, it did not call for Mobil 1 in 2010. Any thoughts out there?
Second question. I drive low miles, maybe 5,000 per year. When I hit the one year mark, the OLM still said I had about 70% life left but I changed it anyway at about 2,000 miles (first oil change). Any other recommendations other than changing it yearly regardless of OLM life left? Same for Mobile 1 or dexos syn blend?
In my low mileage cars (2k-3k per year) with conventional oil, I change every six months. Is that OK? Thank you.