Making The Grade

Anyone can tell you their products are the best. But do you necessarily believe them? That’s why, at Castrol, we are continually testing our products so we can show you how we stand up to the competition. Our goal is to produce products that are the best in class. But don’t take our word for it. See for yourself!

ASTM D665B is an industry-recognized laboratory test that is designed to test the ability of an oil to protect engine parts against rust and corrosion. Oils that failed this test showed pitting and corrosion that could lead to accelerated wear and premature/ expensive repair costs.

*vs. leading monogrades.

FTM3462 is a laboratory test that determines the deposit-forming tendency of a lubricant. The lubricant is intermittently splashed against a heated metal plate, and the thermal and oxidative stresses cause lubricant degradation which can result in the formation of deposits. The weight of those deposits is then measured. Low deposit formation results in better engine performance and extended life for engine parts.

The Oxidative Onset Temperature (OOT) test determines the temperature at which an oil first begins to oxidize or “break down.” A small sample of the oil (a drop) is placed on a small platinum pan. The oil is placed in a piece of temperature controlled lab equipment¹ in the presence of air. The temperature in the lab equipment is raised slowly over time. When the oil sample begins to oxidize (break down) the temperature is noted. This is the OOT. The higher the oil's OOT, the more resistant it is to oxidation.

¹Based on the DSC OOT methodology

*vs. leading monogrades.