you do these from the dealership or somewhere else?...I did my SS in Jan of '17 at about 22,000 miles, and my miles are mostly city miles. We do the 3 part service with throttle body cleaning,injector service and induction system which cleans the backs of the intake valves and piston tops. I think it's good to do, if you hate carbon build up like I do. Plus, I've seen these engine with the heads off,...every engine could use it every now and then.
I did it on my Cadillac SRX after I bought it with 43,000 miles on it about a year ago and plan to do that one every year, because that one has a DI engine. DI engines have a real problem with carbon build up on the valves due to it's design. In our engines, it's not that critical.
Might be time to start visiting the other gas station down the road.Just as an FYI...My 3rd injector has just failed!! I had 2 fail at about 40K miles and this 3rd one failed at 54K miles. None covered under warranty. The first 2 were with a stock setup. This 3rd one failed after having headers/tune setup for about 500 miles. Changing all 8 out now.
I'm guessing that it's a combination of sorts...fuel injectors are "finicky" and/or the fuel filters need to do a better job, fuel quality, and driving characteristics (mostly stop and go).So.....what happens to the injectors? Clog up, coil short, open, stick?? Anyone know ?