Hi everyone, I am in the midst of trading in my 2014 Mazda 3 because of the factory welds rusting and because it is currently in the shop being dismantled for carbon related buildup. I so hopped for Mazda to be innovative with its SkyActiv Petrol engines, but they are Junk. The outgoing MZR motor, albeit was less fuel efficient was far more robust and reliable. I am currently in talks with a Subaru Dealership about a 2015 BRZ. I've gone from thread to thread that state that there aren't any carbon buildup issues. I think this is primarily due to Toyota's implementation of the D4S GDI system which has port injection to alleviate the carbon buildup issues. I'd like some thoughts on the Subaru FA20 for BRZ/FR-S I realize there is an all new FA20 for the WRX and Forrester XT, but those and both Turbo.