OAT antifreeze was formulated to have a much longer life than IAT antifreeze. You can check the specific gravity and color of your coolant to see if it is time. You'll need a test kit to do it yourself. Most of the time, coolant is good longer than the estimate in the owner's manual, but sometimes it breaks down early and you lose performance. Summit Racing™ Performance Fit Aluminum Radiator and Fan Combos SUM-384031-KIT1 Radiator and Fan Shroud Combo, Performance Fit, 4-Row, Aluminum, Polished, Chevy, Corvette, 5.7L, Each Part Number: SUM-384031-KIT1 Aluminum radiators are manufactured using a controlled atmospheric brazing or CAB process to join the parts. we launched Delo® ELC Advanced extended life coolant, an ethylene glycol-based NOAT formulation containing nitrites, with a patented passivation technology that controls the nitrite reaction with aluminum - eliminating the need A 2-row radiator with 1-inch tubes will cool more quickly than a 3-row radiator with ⅝-inch tubes. In terms of surface area, sometimes a two-row radiator can cool more quickly than a three row. One downside to adding rows is that it can make a radiator thicker, which restricts air and reduces cooling capability. Vay Nhanh Fast Money.

do aluminum radiators require special coolant