The NEWER prestone they sell now works fine. Just flush 1x per year like you should with ANY coolant, it will not eat the aluminum head. If you leave it in there for 15 years, any coolant will eat the head. Flush it 1x per year, no problems.
Ditched the G11 for the Prestone 50/50 stuff a while back. Good stuff not problems and hell of a late cheaper then G12.
Of course I've only used the Prestone stuff, not the GM stuff (not sure if it's identical) but ran it on my GTI with no probs and over 100k on my Rabbit without issues.
I've had good luck with the orange Prestone stuff. It's DexCool approved.. basically the same thing as G12 as far as chemistry.
Yes i have used it in my 98jetta wheni replaced my heater core. i have had no probs yet benn 6 months they wouldent sell it if it did not work
I use the new Prestone stuff. No issues...
I've been running Prestone for a year and half, no problems with the cooling system and the engine temps are the same.
Same here, and I almost have 200,000 miles on her. According to Prestone, their green stuff will not damage the engine and or gaskets.
Regarding genuine VW antifreeze and generic...from what I understand, anitfreeze like Prestone is phosphate free but the real VW antifreeze (Pentosin) also has protectants for the plastic parts of the system, etc. The genuine stuff really isn't that expensive from the dealer.
I'm using 50/50 orange coolant (I forget if it's Prestone or Zerex, silver bottle with an orange top) same as I've always used.
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