Can You Mix 5W30 With 5W20 – A Mechanic’S Guide To Safe Topping Off
Yes, you can mix 5W-30 with 5W-20 motor oil in an emergency, like topping off a low engine. However, this should only be a temporary fix. Mixing them will alter the oil’s final viscosity, which can affect engine performance and fuel economy over the long term, so it’s best to perform a full oil change…