Volkswagen G12 coolant - ~$20/gallon Prestone Extended Life coolant - ~$8/gallon Distilled water (preferably reverse-osmosis/deionized water)
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I've had zero issues using green prestone for the past 100k on my 16v. Just change it every 2-3 years. Car never has any white build-up or any build-up in the hoses, so there's no real reason to not use it. Ph level stays neutral. Engine even has the original water pump at 180k :laugh:
Pros: zero issues, ph neutral
Mileage: 100000 km
I bought a 3/8ths 8 inch long copper tube, 4 screw tightening tube clamps and Prestone Antifreeze...I jammed 3 inches of that beast of a tube in one end and 3 inches into the other and put two clamps on each side to hold that baby in. There were flares on each end so I know the thing can't slip out at either end. It was a perfect fit. I then dumped that Prestone Antifreeze into the car and went for a test drive. NO LEAKS!
Pros: no leaks, perfect fit
Vehicle:
Volkswagen
I've used G12 and Prestone in one of my Corrados. No noticeable difference in performance or running temps. I did 100% complete system flush when changing over. I like the Prestone for availability.
Pros: no performance difference
Vehicle:
Volkswagen Corrado
You can regualr coolant as long as COMPLETELY flush out the system. I ran Prestone in my Jetta with regular flushes for 3 years with no problems...an no pitting of my cyl. head
Pros: no problems, no pitting
Vehicle:
Volkswagen Jetta
i run prestone in my 1.8T and have ran it for 6 months now ever since i put a new radiator in bc my old one cracked so my g12 was completely flushed out. no problems for me.
Pros: no problems
Vehicle:
Volkswagen Jetta
Installed a new Coolant Temperature Sensor Flushed cooling system Changed thermostat from 87C to 80C Installed new Radiator Fan switch 85-95C Installed new heater control valve as old valve was seeping coolant Replace all hoses
Vehicle:
Volkswagen
I think you should be fine. If it was the Prestone that you can add to all makes and models, that coolant is compatible with a wide variety of coolants. I have mixed that stuff with Dexcool and green stuff with no issues.
Pros: compatible with wide variety
Cons: mixed with Dexcool, green stuff
I've been using prestone in my 2.0 for 5 years with no problem. The heater will make you sweat and the cooling system works flawlessly.
Pros: cooling system works flawlessly
Cons: no problem for 5 years
Vehicle:
BMW
I can testify that the green stuff is not that bad. my buddies 92 was getting so warm, so we decided to do a complete flush on the system. we bought the prestone system flush, and flushed it twice. when we flushed it, all this crap came out, and the fluid that came out was a MUD color. after the prestone system flush, and 3 flushes with distilled water, we put the 5/150 prestone pure coolant/antifreeze into the 92, mixed 50/50 with distilled water. the 92 ran much cooler after that. on the highway, it was about 170, and in town, it averaged under the half way. so, buy whichever you like, but either way ou do go, make sure to fully flush the system. you will see better results either way.
Pros: ran much cooler
Cons: mud color fluid
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