Fluid Dynamics: Quenching Your Car's Thirst for Health and Performance

July 25, 2024

Have you ever wondered what keeps your car running smoothly?

It's not just the engine and tires—there's a whole system of fluids working behind the scenes to keep everything in top shape.


At David's Automotive Repair, we're here to explain why these fluids are so crucial and how they can affect your car's performance.

Engine Oil: Engine oil is like the lifeblood of your engine, keeping all its moving parts lubricated and protected. There are different types of engine oil:

- Conventional Oil: This is the traditional oil refined from crude oil. It's suitable for many older engines and offers basic protection.

- Synthetic Blend : A mix of conventional and synthetic oils, offering some benefits of synthetic oil at a lower cost.

- Full Synthetic : Engineered for modern engines, providing superior lubrication, performance in extreme temperatures, and longer intervals between changes.

Choosing the right oil depends on your car's age, driving conditions, and manufacturer recommendations. Using the wrong type or mixing different oils can reduce efficiency and potentially damage your engine over time.

Coolant: Coolant circulates through your engine to regulate temperature and prevent freezing or overheating. Mixing different types of coolant can cause chemical reactions that lead to corrosion and cooling system damage. It's important to use the coolant specified by your vehicle manufacturer and to flush and replace it at recommended intervals.

Transmission Fluid: Transmission fluid lubricates and cools the gears in your transmission system. Mixing different types of transmission fluid, like ATF and MTF, can compromise performance and lead to transmission problems. Each type of transmission fluid is formulated for specific transmission designs and operating conditions, so it's essential to use the correct fluid and change it according to your car's maintenance schedule.

Brake Fluid: Brake fluid transmits force from the brake pedal to the brake components. Mixing different types of brake fluid can lead to reduced braking performance and corrosion within the brake system. Always use the type of brake fluid recommended by your vehicle manufacturer and replace it as recommended to maintain safe braking.

Power Steering Fluid: Power steering fluid assists in turning the steering wheel smoothly. Mixing different types of power steering fluid can cause damage to the power steering system components, affecting steering performance and reliability. Stick to the fluid specified in your owner's manual and keep it at the proper level for optimal steering control.

Gear Oil: Gear oil is used in manual transmissions, transfer cases, and differentials to lubricate and protect the gears from wear and overheating. Using the wrong type of gear oil or mixing different viscosities can lead to gear and bearing wear, reduced performance, and potential mechanical failures. It's crucial to use the gear oil recommended by your vehicle manufacturer and replace it according to the maintenance schedule.

Each of these fluids is essential for your car's performance and longevity. Regular maintenance, including fluid checks and changes, ensures your vehicle operates efficiently and safely. At David's Automotive Repair, we're dedicated to helping you understand and maintain your car's fluid systems. If you have any questions or need assistance with your vehicle's fluids, feel free to contact us. We're here to keep your car running smoothly and reliably for years to come!

July 29, 2025
Whether you drive a sedan, truck, SUV, or hybrid, your brakes are your vehicle’s most critical safety system — and they need regular attention. Our ASE-certified technicians are trained to handle almost anything. We take pride in using quality parts and performing thorough testing to make sure your vehicle stops safely every time. Wondering if you need brake service? Look out for: A squealing or grinding sound when braking A soft or spongy brake pedal Shaking or pulling when stopping Brake warning lights on your dashboard Ignoring brake issues can lead to more expensive repairs down the road — and put your safety at risk. We offer brake inspections, testing and analysis, and complete brake repair services right here in The Colony, close to Frisco, Little Elm, Castle Hills, and surrounding North Texas communities. At David’s Automotive Repair, we believe in honest communication, quality workmanship, and helping families stay safe on the road. If it’s been a while since your last brake check, now’s the time to schedule one. We’ll give you a detailed report, walk you through the findings, and never upsell you on anything you don’t need. Brake Repair FAQ How often should I get my brakes checked? We recommend having your brakes inspected at least once a year, or sooner if you notice any warning signs. If you're driving in heavy traffic or stop frequently, more frequent checks are a good idea. What does it mean when my brakes squeal? Squealing often means your brake pads are worn and need replacing. It’s a built-in warning sound to let you know it's time for service. Can I drive with a brake warning light on? It's not safe. A brake warning light means something in your brake system needs immediate attention. Call us to schedule a brake inspection right away. Don’t trust your brakes to just anyone — trust the local shop that puts safety first. Call us today at 972-625-1836 to reserve your brake inspection or brake repair service. We’re proud to serve The Colony and our neighboring communities with care, integrity, and expert service.
July 24, 2025
While most people think cold kills batteries, extreme heat actually wears them down faster. High temperatures can cause fluid inside the battery to evaporate, weaken its charge, and shorten its lifespan. If your battery is more than a few years old, or if your car is slow to start, now’s the time to get it tested. Nobody wants to be stuck with a dead battery in a hot parking lot or on the side of the road. At David’s Automotive Repair, we offer quick and accurate battery testing to give you peace of mind before the next heatwave rolls in. If your battery needs replacement, we’ll take care of it with the right fit for your vehicle—installed by technicians you can trust. Call us at 972-625-1836 or book your reservation online today. Let us help you stay powered up and ready for wherever summer takes you.
July 22, 2025
Belts keep systems like your alternator and power steering working. Hoses carry important fluids like coolant and help your engine stay at the right temperature. Over time, heat and wear can cause them to crack , fray , or leak . If a belt breaks or a hose bursts while you’re driving, it could lead to engine damage or even leave you stuck on the side of the road. That’s why it’s smart to have them checked regularly—especially before long trips or hot summer days. If you’re unsure about the condition of your belts and hoses, we’re here to help with a quick check. Call 972-625-1836 to make a reservation to have your belts and hoses inspected by a certified technician.
July 17, 2025
High temperatures can cause fluids to thin out , break down faster, or even evaporate —putting your car at risk for overheating or part failure. If your coolant is low, your engine can overheat. If your oil is dirty or your transmission fluid is old, important parts may not be properly protected. The summer heat makes staying on top of fluid checks more important than ever. At David’s Automotive Repair, we’ll inspect all your fluids to make sure your vehicle is ready to take on the summer. Call 972-625-1836 or go online to reserve your visit. Let’s make sure your vehicle stays cool, clean, and reliable all season long.
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