Bought for Alde central heating system in caravan so can't use it at moment but all info on this type of product says its what we should be using. Can't really recommend or rate it as haven't used it but no alternative if was to rate product.
The antifreeze was correct for my audi a4 petrol engine, simple just drain off a little water then add, most of all it works to the audi specs, thank you for a good product and just the right amount needed. David