I think there is more clearance for right knee on 2020 vs my old 2016. I also think it is quieter, maybe a bit better gas mileage with CD and I love the stuff in premium - ventilated seats and key fob auto position seats, folding mirrors, walk away locking and radar cruise. I think the...
I had a 2013, a 2016 and now a 2020, all GT+s. My current year long mileage is 31.5 mpg on the dash. The 2020 2.5 NA has cylinder deactivation which for me works great and is not noticeable and gets about the same mpg as my 2.0 did. It is much quieter and I love the radar cruise stop and go on...
I never used the word proprietary. What I said was if you use an additive not compatible with the seals it could shorten the life. The water pump manufacturer probably told Mazda what coolant formula to use for best seal life. I used the special GM Dextrose coolant in my 2000 Corvette and after...
Water pump seal material and other seal material is matched with coolant additives. If you get the wrong additive it can shorten the life of the seals and you will be repalcing the water pump and it might affect the head gasket...
Coolant is matched to the content of the seals on the water pump and other sealers so if you chose to use non OEM to save a few buck it may cost you with an early water pump leak/replacement.
Stability Control will brake the inside of the curve rear (and maybe the front) if you are turning and the front is sliding to help get the car going the direction you are steering.
Radar will go through plastic, paint and glass just fine. I mounted a remote radar detector inside the painted plastic bumper on my Corvette to protect it and it worked fine. Military radar receivers have plastic covers.