I dont think its called Turbo Blue but maybe it is, but its sold at Lordco and at Chevron, and DO NOT GET THE GREEN ONE, and its not 40/60 but 30/70, its the "up to -30 windshield washer fluid"
you can also mix yourself
as long as you consistently get the same stuff, when we tune the car for whatever is in the tank, once tuned and you keep the same stuff it will be fine (i.e if you want all water, fine, if you do a manual mix, fine, if you buy a product, fine, but we wont tune it with any off the shelf BC purchased product except this stuff)
the only negative to the blue stuff is you get a blui-sih intake (inside) and some minor detergents, if you want to be a purist you can buy methyl hydrate and self-mix. the blue is alot easier/simpler for most folks.