I bought this 14 Cadillac ATS 2.0T with a manual transmission with 29k miles. I had the dealer change the oil at 29k, 35k, and 40k. I was a little concerned about the cars history so I did the UOA. The OLM was at 14%.
I figured there would be high Fuel dilution because the last 3k had a majority of short trips. When I do drive it I drive it pretty hard, 5k shifts at least weekly. I also try to run an "Italian tune up" every couple of months(4k rpm for 20minutes) to prevent carbon buildup. Regarding the silicon I changed the air filter 3k mile into the interval.
Now that free oil changes are finished I put in Castrol Edge.
I figured there would be high Fuel dilution because the last 3k had a majority of short trips. When I do drive it I drive it pretty hard, 5k shifts at least weekly. I also try to run an "Italian tune up" every couple of months(4k rpm for 20minutes) to prevent carbon buildup. Regarding the silicon I changed the air filter 3k mile into the interval.
Now that free oil changes are finished I put in Castrol Edge.