AMSOIL® Tech Tips are short how-to videos filmed at Motorhead Garage. In each episode, host John Gardner, an ASE Master Certified technician, and AMSOIL Director of Product Marketing Len Groom explain how a vehicle system works, what goes wrong and how to keep it in good shape. Every video below appears in a blog article with a full transcript.
Who hosts AMSOIL Tech Tips?
John Gardner
John Gardner is the host of Motorhead Garage and co-host of AMSOIL Tech Tips. An ASE Master Certified technician with Advanced ASE Engine Performance certification, he has taught automotive technology at Chipola College since 2000, covering engine performance, transmissions, brakes, electrical systems and alternative fuels. He previously worked as a shop manager and lead technician and helped develop ASE- and NATEF-aligned training curriculum.
Len Groom
Leonard “Len” Groom is Director of Product Marketing at AMSOIL. He supports product strategy, technical positioning and market development for automotive, powersports, commercial and original-equipment applications, and works with product-development, legal, marketing and communications teams to translate test results into accurate customer guidance. Read his author profile.
Tech Tips by topic
Motor Oil & Fluid Education
- Understanding Oil Viscosity
- The Science of Multigrade Oils
- Advanced Protection for Hybrid Vehicles
- Two-Stroke vs. Four-Stroke Engines: Key Differences
- Why Does Motor Oil Turn Black?
- Do I Need to Change Oil Every 3,000 Miles?
- Why Do I Need To Change My Oil?
- Synthetic vs. Conventional Oil: The Differences That Matter
- 5W-20 vs. 5W-30 vs. 10W-30: What’s the Difference?
- Do Oil Additives Work? What the Testing Shows
- Are all Synthetic Oil Groups the Same? Group III vs IV vs V
- AMSOIL 100% Synthetic High-Mileage Motor Oil Attacks Sludge
- Is High-Mileage Motor Oil a Gimmick?
- How Do I Know Which AMSOIL Products To Use?
- What is Fuel Dilution (and Why is it Bad)?
- Motor Oil Explained: A Beginner’s Guide to Grades and Types
Engine Fundamentals & Protection
- What Are Piston Rings?
- What Does Motor Oil Do? The 12 Functions of a Lubricant
- How to Test Engine Compression
- The Art and Science of Engine Break-In
- What is Assembly Lube?
- Low Oil Pressure Symptoms and Causes
- Does Synthetic Oil Cause Leaks?
- Low Engine Oil? This Might Be the Problem
- AMSOIL Hybrid Motor Oil Protects Hybrid Vehicle Engines
Fuel Systems & Engine Performance
- Fuel-System Maintenance is Essential in Modern Engines
- A Closer Look at Diesel Fuel Systems
- What Do Spark Plugs Do?
- Why Does Diesel Fuel Need Additives?
- How to Fight Ethanol Problems in Small Engines
- Turbocharger vs. Supercharger: How Each One Works
- Fuel Filters Require Regular Service
- How to Clean Fuel Injectors: Gas and Diesel
Transmissions, Differentials & Drivetrain
- Why Change Transmission Fluid?
- How Does an Automatic Transmission Work?
- How Often to Change Transmission Fluid (By Type)
- The Best Performing ATV & UTV Oil?
- Limited-Slip Differential: How It Works and Which Gear Oil to Use
- Why Upgrade Your Differential Cover?
- Manual vs. Automatic Transmission Fluid: The Difference
- How Often Should I Change Differential Fluid?
- Which Automatic Transmission Fluid Do I Need?
- Premium Valve-Body Protection
- How Does a Dual-Clutch Transmission (DCT) Work?
- How to Use a Grease Gun
Brakes & Braking Systems
- DOT 3 vs. DOT 4 Brake Fluid: What’s the Difference?
- Neglected Maintenance: Brake Fluid
- Brake Fluid: The Most Overlooked Vehicle Maintenance
- What’s ABS in a Car?
- How to Bleed Brakes
Cooling & Temperature Management
- Why is there Sludge/Slime in my Radiator?
- Do Coolant Additives Work?
- Outstanding Cooling-System Protection
- Why is My Engine Overheating?
- What’s the Best Motor Oil for High Heat?
Maintenance, Car Care & Vehicle Longevity
- How to Change Air Compressor Oil, Step by Step
- 9 Motor Oil and Car Maintenance Myths, Busted
- An AMSOIL Aerosol for Almost Anything
- Long-Term Vehicle Storage Tips
- How to Use a Torque Wrench Correctly, Step by Step
- How to Repack Trailer Bearings
- Power Steering Fluid: How to Check It and When to Change It
Powersports, Motorcycle & Marine
- How Exhaust Power Valves Improve Two-Stroke Performance.
- Two-Stroke Mix Ratios: 50:1 vs. 40:1 Explained
- When and How Often Should I Use Dirt Bike Chain Lube?
- ATV Maintenance: Tips to Make Your ATV or UTV Last
- The 5 Approaches to Vehicle Maintenance: Which One Fits You?
- How to Perform a Harley-Davidson Oil Change
- What’s the Best Motorcycle Oil?
- How to Improve Dirt Bike Clutch Feel
- Service Marine Lower Units to Prevent Water Damage
- 10 Expert Boat Maintenance Tips
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