Best Oils for High Milage 5.3 Vortec Engines

by Al | Last Updated: August 15, 2021

The 5.3 liter Vortec, what an absolute unit of an engine. Plenty of power on demand, the great sound of a V8, what more could you ask for? As these Chevy Silverados get older and more become high milers the 5.3 liter Vortec needs a little extra love and care. One of the simplest ways to look after them is a regular oil service. As the miles tick upwards you need to be extra choosy when it comes to the engine oil and picking the best one. That’s where we come in, helping to show you the best engine oil for your high milage 5.3 Vortex. So read on for the tips and tricks along with the perfect oil choice.

What oil to choose

For a newer Chevy Silverado, it’s recommended to go for an SAE 0W-20, but when looking at older high milage Silverados we want to look at a good quality SAE 5W-30. You may be wondering what these numbers mean, you’re definitely not alone in this. Basically, in short, the W stands for Winter. The number before the W represents the viscosity (effectively the thickness) at cold temperatures and the second number represents the viscosity at the engine operating temperature. If you live in a state with cold winters, you may wish to buy a 0W-30 to help with cold starts.

Before buying or adding engine oil to your 5.3 Votrec engine, we recommend always checking your vehicle handbook to see what the manufacturer recommends. Different production years/series may vary.

How much oil does a Chevy Silverado 5.3 vortec require?

This depends on the age of Silverado you own, the older models have a slightly larger capacity. No matter the age and model, the capacity is going to be around 6 – 8 quarts of oil.