What Is The Distinction Between 5w30 And 5w40 Engine Oils?
Hey there, fellow motorheads! If you've ever popped the hood of your car or motorcycle, you've probably noticed the myriad of options available when it comes to engine oils. The most common questions I get asked revolve around understanding the differences between various oil viscosities, and today, I'm here to shed some light on one of the most common dilemmas: 5W-30 vs. 5W-40 engine oils . As an enthusiast and an industry expert, I've spent years delving into the intricate world of lubricants and engine oils. So, grab your favorite wrench, sit back, and let's explore the distinctions between these two engine oil grades! What Do Those Numbers Even Mean? Before we delve into the specifics, let's break down the enigma that is the "5W-30" and "5W-40" nomenclature. The numbers in these designations refer to the oil's viscosity or thickness at different temperatures. The "5W" part represents the oil's viscosity in cold temperat...