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Practical Auto Mechanics, a free technology course on Tomo

Practical Auto Mechanics

Like Duolingo, but for Practical Auto Mechanics. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.

For the part of you with thirty open tabs that never became anything.

28 levels across 4 sections, about 56 minutes end to end, roughly 11 days at five minutes a day. It moves through Essential Routine Upkeep, Diagnosing Common Troubles, Performing Core Replacements, and Under-the-Hood Diagnostics. It starts from scratch.

28 bite-size levelsAbout 5 minutes each

Free forever · No credit card · iPhone & Android

Otto the Otter, the guide who teaches the Practical Auto Mechanics course
Practical Auto Mechanics
with Otto the Otter
28
Levels
4
Sections
5
Min/day
What you'll learn

Key ideas in Practical Auto Mechanics

  • Cars can roll unexpectedly if parked on an incline or bumped while working
  • Wheel chocks physically prevent movement even if the parking brake slips
  • Eye protection shields against pressurized fluid sprays and road grit under the hood
  • Waiting a few minutes lets warm oil drain down into the oil pan for an accurate level reading
  • The first pull must be wiped clean; only the second insertion gives a true reading
  • Healthy oil is amber to brown, while gritty, milky, or jet-black oil signals contamination or overdue changes
  • Automotive fluids expand as the engine bay heats up, requiring expansion space below MAX
  • Dropping below MIN pulls air into hydraulic brake lines or steering pumps, degrading operation
  • Clear plastic reservoirs allow visual confirmation without opening sealed caps
  • Light passing through pleated paper shows open pores for clean airflow
  • A blocked filter chokes the engine of air, dragging down fuel economy
  • Surface dust alone isn't an issue unless light is completely blocked
  • A slow, steady drop in fluid reveals a hidden leak before a dashboard warning light turns on
  • Mileage tracking helps plan maintenance before oil breaks down or parts fail
  • Written history proves consistent care and eliminates guessing when a service was last done
  • Hydraulic jacks rely on fluid pressure that can suddenly fail or bypass without warning
Why not just Google it

You've tried the other tabs

Wikipedia

Thirty open tabs. Four facts you actually kept.

YouTube

You watched. You nodded. By Sunday it was gone.

ChatGPT

One answer, then back to scrolling.

Online courses

Eight weeks. You meant to finish. You didn't.

Tomo gives Practical Auto Mechanics the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.

Try a question

Here's what playing it feels like

A real question from this course. Take your best guess.

Securing the Deck and Checking Oil

Why wedge wheel chocks firmly behind the tires if the parking brake is already on?

Get it right to open this lesson and 27 more in the app.

Course map

Where Practical Auto Mechanics takes you

Learn to maintain, diagnose, and repair your car with practical confidence. From roadside tire swaps and fluid checks to brake service, electrical diagnosis, and engine troubleshooting, build real hands-on mechanical competence.

  1. 1

    Essential Routine Upkeep

    • The Pre-Flight Check: Fluids, Filters, and Safety
    • Roadside Emergencies: Jacking, Wheels, and Jump-Starts
  2. 2

    Diagnosing Common Troubles

    • Decoding the Dashboard: OBD-II Scanners and Warning Lights
    • Reading the Clues: Noises, Vibrations, and Leaks
  3. 3

    Performing Core Replacements

    • Servicing the Brake System: Pads, Rotors, and Bleeding
    • Ignition and Electrical Health: Spark Plugs, Coils, and Fuses
    • Managing Engine Temperature: Coolant Flushes and Thermostats
  4. 4

    Under-the-Hood Diagnostics

    • Tracing Electrical Faults with a Multimeter
    • Engine Breathing and Fuel Delivery: Belts, Sensors, and Throttle

4 sections · 9 units · 28 levels. Built to play, not to enroll.

How it's taught

You pick the voice

This course
The Pirate

Practical Auto Mechanics is taught in the The Pirate style: arr, learning be an adventure!. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.

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