I use PEAK Global LifeTime Coolant. It meets the Mercedes Benz DBL 7700 specs and still has the "yellow" color like the $22/gallon stuff.

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"B. What is an Organic Acid Technology (OAT) coolant and how is it different than conventional coolants?

Conventional antifreeze is formulated with inhibitors composed of neutralized inorganic acids, such as phosphates and silicates, to protect a cooling system against rust and corrosion. Over time, however, inorganic inhibitors deplete and may no longer provide maximum cooling system protection. This is why it is generally recommended that conventional coolants be changed every 2 years or 24,000 miles.

In contrast, OAT coolants are formulated with neutralized organic acids to form a highly effective corrosion inhibitor system that provides maximum cooling system protection. Organic inhibitors do not deplete as quickly as the inorganic inhibitors used in conventional coolants. This is why properly formulated OAT coolants typically provide up to 150,000 miles or 5 years of cooling system protection between service intervals. The superior OAT formula in PEAK Global LifeTime uniquely provides a LifeTime of cooling system protection - for as long as you own your vehicle."

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F. My owner’s manual instructs me to use a particular brand of antifreeze/coolant. Will my new car warranty automatically be voided if I use an aftermarket antifreeze/coolant that is different than the antifreeze/coolant brand identified by the manufacturer?

No. Federal Law, the Magnuson-Moss Warranty Act, prohibits a manufacturer or dealer from voiding your warranty just because you have chosen to use an aftermarket antifreeze/coolant in your automobile.

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J. Can I use PEAK Global LifeTime Antifreeze & Coolant in European and Asian manufactured automobiles?

Yes, PEAK Global LifeTime Antifreeze features an advanced patented technology that provides maximum rust and corrosion protection for cooling systems found in European and Asian automobiles. Additionally, the patented technology found in PEAK Global LifeTime Antifreeze meets the silicate-free coolant requirements of Asian car manufacturers and the phosphate-free requirements of European car manufacturers.