2009 BMW M3 Owner's Manual - Page 208

Under the hood Viscosity ratings Viscosity is a measure of an oil's flow rating and is categorized in SAE classes. Approved oils belong to the 10W-60 SAE class.< Checking coolant level 1. Do not open the engine hood before the engine has cooled down. 2. Turn the cap of the expansion tank a little counterclockwise to allow any accumulated pressure to escape, then continue turning to open. 3. The coolant level is correct if it is between the maximum and minimum marks in the filler neck, refer also to the diagram next to the filler neck. Alternative oil types If BMW High Performance Synthetic Oil is not available, you can add small quantities of other synthetic oils in between oil changes. Only use oils with the following specifications: > Viscosity: preferred: SAE 10W-60; alternative: SAE 10W-40, SAE 5W-50 or SAE 10W-50 > Specification: API SJ/CF, API SK/CF or higher Low ambient temperatures The oils used at BMW factories for your vehicle type are suitable for virtually any ambient temperature. However, if the vehicle is operated at temperatures below -47/-206 for extended periods, your BMW center will be glad to recommend an optimal oil. 4. If the coolant is low, slowly add coolant up to the specified level; do not overfill. 5. Turn the cap until there is an audible click. 6. If the loss of coolant is substantial, have the cause eliminated as soon as possible. Coolant Do not add coolant to the cooling system when the engine is hot. Escaping coolant can cause burns.< Coolant consists of half water and half additive. Not all commercially available additives are suitable for your BMW. Ask your BMW center for suitable additives. Only use suitable additives, otherwise engine damage may result. Because additives are harmful to your health, it is important to follow the instructions on the containers.< Comply with the appropriate environmental protection regulations when disposing of coolant additives.< 206 Online Edition for Part no. 01 41 2 600 999 - © 08/08 BMW AG