It could also be that different markets use coolant sourced from different suppliers, and suppliers for the US aren’t yet capable of producing the G13. What I suspect is that VW isn’t yet able to produce enough of the G13 to supply markets outside of Europe. So there is a difference in manufacture, but it may not matter in actual use, and the final product may be identical. In comparison with the manufacture of traditional coolant additive, it is estimated that G13 production will produce 11 per cent lower CO2 emissions. Glycerin, a bi-product of biodiesel production, is much less harmful to the environment than glycol-based products, which are produced from mineral oil.

G13 coolant additive provides the same exceptional cooling and antifreeze performance as G12++, but is manufactured in an environmentally sustainable way, using glycerin instead of glycol. Here’s some interesting info from a site: Anyway, other than the little things like replacing the. Some punk kid owned it before me and obviously didnt know how to take care of a VR properly (whatevers in the cooling system is definitely not g12. It seemed to start out as Europe-only and Skoda brand only. Hi All I recently purchased a 2001 VW GTI VR6, 12v of course, with 120k miles and bone stock. It appears that they are really the same thing, but G13 is produced in a slightly more 'environmentally friendly' manner. Disconnect the fourth connector on the other side, show here by the blue arrow. Disconnect three of the connectors to the intake shown by the red arrows below. This will depressurize the coolant lines. I did quite a bit of research on G12++ vs G13. Remove the cover to the coolant reservoir.

Using g13 coolant mk4 vr6