The capacity varied a little depending on exact model and year but should be between 8.5 and 9 litres.

Basically it is 2 years in the car. I'm afraid I am not familiar with the Astra Mk 4 so I can't help with the draining of the system, please refer to your manual.

Between 5.5 and 6 litres

You can't rely on the colour of antifreeze to tell you anything about its chemistry unfortunately. The fluid that would have been used in the factory is based on Organic Acid Technology which is what our Advanced Antifreeze uses so is the correct type of fluid despite the fact that the mixture may end up being a funny colour.

We believe that L250 is a Nissan specification for coolant for which we can find no detailed information unfortunately. Contact your vehicle manufacturer for further advise on what type of coolant they recommend.

Halfords Antifreeze contains a silicate based corrosion inhibitor. It contains no Methanol, Nitrates, Amines or Phosphates. It meets the requirements of BS6580 which is a minimum industry standard for antifreeze of this type.

Halfords Ready Mixed Antifreeze & Coolant is probably a more suitable product with which to top up the cooling system of your 2001 Nissan Micra being that it as an OAT based product similar to that recommended by the manufacturer. If you are unsure what type antifreeze is currently in your vehicle then it would be best to drain and refill the system completely as you shouldn't mix antifreeze of different types.

Halfords Advanced Antifreeze & Coolant Concentrate would more than likely be the most suitable product from our range for this vehicle however if you are in any doubt as to what type of coolant is already in the system then you should drain, flush and refill to ensure proper protection. Antifreeze of different types should not be mixed as this can compromise performance.

Halfords Antifreeze & Coolant Concentrate would be the most suitable product from our range for the cooling system of your 2001 BMW 318. This product is of a similar type to that which is recommended by the
manufacturer however it is not the approved product in this case. If you wish to use the manufacturer approved product then you need to look for Comma Xstream G48 which should be available from your local Halfords
store.

Halfords Antifreeze & Coolant Concentrate would be the most suitable product from our range for your 1976 Hillman Hunter being that it is very similar to what would have been available at the time your vehicle was manufactured. It is not advisable to use only water in the cooling system of any vehicle as this can cause corrosion of the metal components and hence damage your engine.