Ours is a 19' Denali.. 2.0 Engine.. Always top tier gasoline (usually mobil and always premium). The car has 3,850mi. on it and I put a bottle of techron concentrate in the tank after the first oil change which was done with Dexos synthetic at 3,000mi. Most of our driving is shorter trips, less than 10mi.. We did drive it about 80mi.(40mi. each way) today and I noticed less soot than what the chrome tips usually have on them so perhaps it's short trip related. It's still a PITB to keep them clean and I understand this is somewhat inherent to having DI.... The only engine that has dual chrome tips is the 2.0 so I assumed which engine I had would be obvious. I'm not 100% sold on the techron being of any value after researching but I'll continue to throw a bottle in the tank at each oil change (which I plan to do at 5,000mi. intervals)
Last edited by tic; 10-30-2019 at 10:37 PM.