Halfords Advanced Antifreeze & Coolant Concentrate would be the most suitable product from our range for your 2000 Audi RS4 being that it is an OAT based product similar to that recommended by the manufacturer. This is not an absolute equivalent to the VW G12 product as it does not carry the formal OEM approval but it is a very similar product and should be fine to use as an alternative. If your preference is for a coolant that is formally approved against the OEM specification then you will need to contact a main dealer for an appropriate product.

A more suitable product for your 2001 Hyundai Coupe would be Halfords Advanced Antifreeze & Coolant Concentrate which is an OAT based product similar to that recommended by the manufacturer. Comma Xstream G40 is only specified for certain VW/Audi Group vehicles and whilst it would more than likely do no harm to your cooling system it is not the most suitable product in this case.

The most suitable product from our range for a 1997 VW Polo would be
Halfords Advanced Antifreeze & Coolant Concentrate being that it is OAT
based product similar to that recommended by the manufacturer. This
product meets the requirements of the VW specification 'TL 774-D' (G12)
which is the appropriate specification for this vehicle. Comma Xstream
G40 is OEM approved for VW/Audi group vehicles manufactured from 2005
onwards and would therefore not be the product we would recommend for
this application.

This will depend on the age of the vehicle. The VW/Audi group allow for Xstream G40 to be used in all of their vehicles produced from 2005 onwards even though this product was not introduced (and therefore not
specified) until after 2008. If you are still left in any doubt then please contact your main dealer for further information.

The VW/Audi Group do allow for the use of Comma Xstream G40 in all of their vehicles produced from 2005 onwards even though the product wasn't introduced (and therefore not specified) until 2008.

Halfords Advanced Antifreeze & Coolant Concentrate would be the most suitable product from our range for your 2000 VW Passat being that it is an OAT based product similar to that recommended by the manufacturer. This is not an absolute equivalent to the VW G12 product as it does not carry the formal OEM approval but it is a very similar product and should be fine to use as an alternative. If your preference is for a coolant that is formally approved against the OEM specification then you will need to contact a main dealer for an appropriate product.

Comma Xstream G40 is suitable for all VW/Audi Group vehicles
manufactured from 2005 onwards, including those requiring a product that
meets the specification VW 774-F. If your vehicle is manufactured after
this date then G40 would be the correct product to use. If not then
please get in contact with us again with the year of manufacture to
allow us to identify exactly what product you should use in your
vehicle.

Hi, thanks for your question. No, Comma XStream G40 Antifreeze Concentrate 5 Litre is officially approved for VW-group vehicles from 2005 onwards. The most suitable product from Halfords' product range is Halfords Advanced Antifreeze & Coolant, as this product is based on OAT technology.