

Hot Shot's Secret Adrenaline R4 15W-40 is a 100 percent synthetic racing engine oil formulated for the toughest racing applications. Its blend of PAO and polyester base oils needs very little viscosity improver, leaving room for patented FR3 Nano Technology and a high-zinc, extreme-pressure additive package with antimony levels over 400 ppm. The result is a racing oil with strong oxidation and thermal stability, reduced breakdown and shear, high wear resistance and horsepower gains of up to 3 percent. R4 15W-40 is the Adrenaline grade for high-horsepower diesel and heavy-duty race engines.
Part number R4-2.5G is the 2.5 gallon jug.
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