Standard Test Method for Evaluation of the Ability of Engine Oil to Emulsify Water and Simulated Ed85 Fuel

Nov 16, 2002

"At the end of the day, the motor oil circulating in your engine drains back into your oil pan and sits there," says Warholic. "Water is heavier than oil, so if it separates from the oil, it sinks to the bottom of the pan. When you start your car in the morning, the first thing your oil pump sees could be water, which is a terrible lubricant."

Original Equipment Manufacturers (OEMs) have identified the critical need for a motor oil to properly manage water, fuel and ethanol. A mandatory performance test is included in the widely utilized API SP and ILSAC GF-6 oil specifications. The test is formally known as ASTM D7563 and measures the ability of an oil to emulsify a mixture of water and fuel for a prescribed length of time.

Through a series of exhaustive in-house tests at Valvoline's New Product Laboratory and complementary testing at an independent third-party laboratory, Valvoline's scientists were able to demonstrate a 24X improvement in emulsion stability versus the leading synthetic."

*Doubt it matters much but I learned something new today which was that there is a test called ASTM D7563.