2015 Outback 2.5i Premium
Went to Goodyear to have my tires rotated and they called to say I have carbon buildup and they recommend their 3-part fuel and induction system cleaning. Cost would be $109. I declined until I learn more. He said he removed some hose and there was black carbon that shouldn't be there. I have no idea where in the engine area he did this so cannot verify his observation. Not finding much on google so looking for feedback. I've got 72K on my '15 with 4 high mileage RT trips this year from the midwest -CO 2x, TX, WA.