If you’ve been to an automotive store, you’ve probably noticed that there are dozens of motor oils to choose from. Each one is engineered for specific purposes using additives to boost aspects of durability, performance, heat-resistance, evaporation, and more. Austin’s Automotive Specialists in Cedar Park, Texas understands all of these factors and keeps them in mind when selecting the right motor oil for our customers. When you visit us for an oil change, ask us about the additives that are in your vehicle’s fluid!
As the oil heats up, it tends to thin out. That can be a problem for certain vehicles, which is why viscosity-index improvers are used. They reduce the oil’s tendency to thin as temperature increases.
Unlike household cleaning agents, detergents used in motor oils don’t scrub engine surfaces, but they do prevent the formation of deposits, rust, and corrosion at high temperatures. They also remove solid deposits from the system.
Solid particles that enter the motor oil can clump together to form sludge, acids, or varnish. Dispersants keep them separate in the solution to prevent this.
Motor oil can’t always lubricate 100%. That’s why oil changes are needed to replace it when lubricating films wear out. Anti-wear agents are also used to protect metal surfaces from friction.
Graphite, molybdenum, and other compounds are used to reduce engine friction and its harmful effects.
Even oil with a low viscosity rating may not flow easily at low temperatures. Wax particles may harden to reduce flow, so pour-point depressants are used to prevent congealing.
Today, emissions control is more important than ever. Antioxidants prevent oxidation and thickening of oil to keep the engine running smoothly and efficiently. Thicker oil takes more energy to move around.
Movement from the crankshaft can cause foaming, which makes the oil less effective as a lubricant. Foam inhibitors stop this problem by causing foam bubbles to collapse.
These compounds protect metal parts in the engine from harmful rust and corrosion-causing acid and moisture.