Bit confused. My 2014 petrol VRS had the coolant bottle with the ghastly Silkat bag installed. I removed it a year or so ago. I topped up the system with G13, which is what is marked on the outside of the bottle.

 

As the car is seven years old now, I am going to flush and replace the coolant. After looking round the internets, some people are saying to re-fill with G12++ spec coolant now, which is needed becasue the silicon bag is now missing. But others say to stick with G13.

 

Which is right? Comments gratefully received, ta.

 

 

G12++ or G12evo will protect for longer. If you replace the coolant every 2 years then G13 will do as well. You can mix G12++ and G13 freely.

 

I also recently removed the silicate bag, and I still have 4l+ of G13 concentrate. My compromise solution is to use G12++ mixed with G13 50:50 and then 1 part of this mix with 2 parts water.  I still am going to do a part flush of 2l / per year or so.

 

My preference would be 25% G12++ : 25% G13 : 50% H2O but it seems my 184bhp diesel vRS is cooling limited when on autobahn and above 130mph - oil temperature creeps up to 115degC after 5-10min or so. More water in coolant seems to give extra 2-3deg C headroom. I looked at fitting an additional oil cooler, but decided it's too much hassle.

 

 

On 21/04/2021 at 11:59, dieselV6 said:

G12++ or G12evo will protect for longer. If you replace the coolant every 2 years then G13 will do as well. You can mix G12++ and G13 freely etc...

 

 

 

Thanks for this V6. I'll go for the G12++, seems like the best option. Cheers!