Ever wonder what the numbers on your motor oil mean? 10W30 isn’t random…it’s all about viscosity, aka how your oil flows when it’s cold vs. hot. The ‘W’ stands for Winter, not weight! Using the right oil keeps your engine protected in all temps, a so always check your owner’s manual before topping off. #MotorOil #CarTips #SummitRacing | Summit Racing Equipment

Quick, simple video on what those numbers mean on a bottle of oil! The single most important factor of a lubricating oil is its viscosity. There’s a long list of industry standard tests that an oil goes through to certify this rating (for anyone curious, this includes ASTM D5293, D4684, D445, and D4683) at both cold (-10°C to -40°C) and hot (100°C to 150°C) temperatures. Yep, even your uncle that’s always talking about how it’s -40°C, waaayyy colder than where *you* live, is considered. And thos