Posts Tagged: thicker oil

Should you use a thicker oil in an older engine

Learn why you shouldn’t use thicker oil in an older engine? One of the most common questions I see is if you should start using a thicker oil as your engine racks up the miles. Their thinking is that an older engine has larger clearances and, therefore, needs a thicker oil. Plus, they think a thicker oil produces a stronger oil film to seal piston rings better. But that theory is false. Engine designers specify a certain oil viscosity for a reason, and it’s based on bearing clearances, engine cooling … Read More