Yuki Mori Car Mech Tricks
Launch promo ends in 00:00:00
Get the Book — $47 $27
Yuki Mori Car Mech Tricks

A shop is not in the business of fixing your car. It is in the business of selling hours.

Once you understand that one sentence, most of what happens at a service counter stops being mysterious — and a great deal of it stops happening to you. Ninety chapters on how the money is really made, the upsells one by one, the jobs you can do in your own driveway, and the exact sentence that ends each conversation.

Get the Book — $47 $27 See What's Inside →
Instant download · Yours forever
90
Chapters
7
Parts
136
Pages
Yuki Mori in the workshop

"This is not an attack on mechanics. I am one. It is an explanation of a system."

Before You Begin
Stop Getting Scammed at the Shop — Yuki Mori, First Edition
I · The Book

Stop Getting Scammed at the Shop

The repairs you can do yourself, and the ones they overcharge you for.

I trained in Japan. I have worked in dealerships, in chains, and in small independent shops, and the overwhelming majority of the people I have worked alongside were honest and skilled and cared about doing the job right. If this book leaves you distrusting every person in a set of coveralls, I have failed at writing it.

What it is, is an explanation of a system. Repair shops are businesses with a particular structure, a particular way of paying people, and a particular set of pressures. That structure produces predictable behaviour. Some of what it costs you is shops taking advantage. A surprising amount of it is customers handing money over voluntarily, out of politeness or hurry or not knowing what to ask.

"You are not billed for the time the technician actually spends on your car. You are billed for the time a book says the job should take."

Every chapter has the same shape. What is happening, and why. What is actually true about it. The specific thing to ask, do, or check — usually written as a sentence you can say out loud at the counter. And then a section called The Limits, which tells you where the advice stops working, what varies by vehicle, and when you need a professional rather than a paragraph.

Chapters are short deliberately. You should be able to read one while the kettle boils, and use it that same week.

Get the Book — $47 $27
II · The Difference

Nobody walks in wanting to overpay. They walk in without the words.

The bay is empty at two in the afternoon, the board at the back says sixty percent productivity, and your car is already on the lift for an oil change. That is where the money comes from. Here is what changes when you know it.

How the visit usually goes
  • Say "just fix whatever it needs" and find out what that meant at the till
  • Approve work over the phone with no number attached to it
  • Take the filthy air filter held up in the waiting room at face value
  • Pay for a transmission flush, an engine flush and a fuel injection service in one visit
  • Agree to an alignment because there are new tires on the car
  • Hand over $120 to be told what the check engine light says
  • Pay shop labour for a cabin filter that sits four clips behind the glovebox
  • Chase the cheapest quote and pay for the same job twice
  • Keep no records, so every shop starts you from zero
How this book has you go
  • A written symptom description in, and a written estimate out, before anything starts
  • "Please do not exceed that without calling me first" — said before the keys leave your hand
  • "Can I take the old one with me?" — then a phone flashlight through the pleats
  • Each of the three named, and the narrow cases where they genuinely apply to your car
  • Alignment when a measurement says so, not when the tires are new
  • The code read in your own driveway by a $20 dongle before you walk in
  • Sixteen driveway jobs done with about $250 of tools, bought once
  • The jobs worth every dollar of shop labour, named — so you pay properly for those
  • The folder in the glovebox that answers the question before it is asked
III · What's Inside

Ninety chapters, seven parts, in the order the money actually leaves you

How the business works, then the scams one by one, then the mistakes that are yours, then diagnosing it yourself, then the jobs you can do, then when to stop and pay, then how to find the shop worth paying. Every chapter closes with The Limits.

Part One

How A Shop Makes Its Money

Chapters 01–12 · 12 chapters
  • The number that explains everything: labour hours sold
  • Book time: why you pay three hours for a one-hour job
  • The service advisor is a salesman, not a mechanic
  • How technicians get paid, and why it matters to you
  • Where the real profit lives: fluids, filters and add-ons
  • Why the free inspection is never free
  • The warranty trap and the Magnuson-Moss Act
  • Shop supplies, hazmat fees and other line items
Part Two

The Scams, One By One

Chapters 13–30 · 18 chapters
  • The dirty air filter trick
  • The milky dipstick show
  • The transmission flush you almost certainly don't need
  • Engine flush: the bottle that can cost you an engine
  • "Your brakes are metal on metal"
  • The alignment upsell after every tire job
  • The leaking shock photo that isn't your car
  • "While we were in there": the bill that grew
Part Three

The Mistakes That Cost You

Chapters 31–41 · 11 chapters
  • Saying "just fix whatever it needs"
  • Not asking for the old parts back
  • Approving work over the phone without a number
  • Ignoring a noise until it becomes a tow
  • Chasing the cheapest quote
  • Skipping the test drive before you pay
  • Trusting the oil life monitor blindly
  • Being difficult with the only people who can help you
Part Four

Diagnose It Before You Go

Chapters 42–54 · 13 chapters
  • The $20 scanner that changes the conversation
  • How to read a trouble code without panicking
  • Listening to your car: a noise vocabulary
  • Where the leak is coming from: the cardboard test
  • Checking your own brake pads in five minutes
  • Reading tire wear like a mechanic
  • Testing a battery and alternator without tools
  • Writing the symptom down properly
Part Five

The Jobs You Can Do Yourself

Chapters 55–70 · 16 chapters
  • The tools that cover ninety percent of home jobs
  • Jacking a car up without killing yourself
  • Changing your own oil
  • Engine air filter in four minutes · cabin air filter
  • Battery replacement and terminal cleaning
  • Spark plugs · brake pads and rotors
  • Serpentine belt · coolant · tire rotation
  • Plugging a tire, and when not to
Part Six

When To Pay, And How To Pay Less

Chapters 71–80 · 10 chapters
  • The jobs worth every dollar of shop labour
  • Timing belts and chains
  • Transmission work · air conditioning
  • Airbags and safety systems
  • Alignment and suspension geometry
  • How to ask for aftermarket parts and save 40 percent
  • The used part that is better than new
  • Negotiating a repair bill without a fight
Part Seven

Finding An Honest Shop And Keeping The Car

Chapters 81–90 · 10 chapters
  • How to find a good shop before you need one
  • The ten questions that reveal a shop in two minutes
  • Reading a written estimate line by line
  • The words to say at the counter
  • What to do when the bill comes back higher
  • Disputing a repair: the ladder
  • The maintenance schedule that actually matters
  • The six-minute monthly check · the folder in your glovebox
In Every Chapter

The Limits

Ninety of them
  • Where the advice stops working
  • What varies by make, model, year and market
  • Which figures are orders of magnitude, not quotations
  • When the upsell in front of you is the real thing
  • Which jobs should not be improvised in a driveway
  • Which other chapters this one depends on
And at the back — the pages you actually carry
  • The Glovebox Card — your car's numbers on one page
  • The Counter Script — every sentence, ready to say
  • Quick Reference: the scam, and the question that ends it
  • A glossary of every shop term used in the book
  • Cross-references between chapters, written out rather than hidden
  • Laid out as pages you can print and keep in the car
Get the Book — $47 $27
Instant download · Yours forever
IV · Reader Results

From the first readers

What people write in after their first visit to the counter with the book behind them.

★★★★★

"They came out with the filter and I said the line from chapter 13 — can I take the old one with me. He put it back in the car. That was $60 saved on a book that cost $27."

Dave R. · Ohio · 2014 Camry
★★★★★

"Bought the $20 scanner the day I read part four. The code was a loose gas cap. The dealer had quoted me a diagnostic fee to tell me the same thing."

Marilyn T. · Retired, Arizona
★★★★★

"What I did not expect was the chapters telling me when to stop and pay. I gave the timing belt to a proper shop and did the brakes myself. Both were the right call."

Steve K. · First driveway oil change at 58
Yuki Mori
V · About

I have stood in front of that board with my name on it.

I am Yuki Mori. I run Car Mech Tricks, where I take apart the things that happen to people at a service counter — what the estimate really says, why the quote on the phone is never the final bill, which noise means stop driving and which one means book it in next month.

I trained in Japan, where shaken inspection makes a car's whole life a paper trail, and where a shop that cuts corners does not stay open. Then I worked in dealerships, in chains, and in small independents. I have been the technician the manager pointed at on the productivity board, and I have been the one who had to tell a customer that the last shop sold them a service their car does not have.

None of this is written to make you suspicious of your mechanic. Find a good one and pay them properly — two whole parts of this book are about exactly that. What it is written to do is give you the vocabulary, so that the conversation at the counter happens between two people who both know what is going on.

Some of what is in the book has appeared on the channel. Most of it goes further, because a video has to be about one thing and a chapter does not.

Yuki Mori
First Edition · 2026
VI · Order

Stop Getting Scammed at the Shop — First Edition

One file. Ninety chapters. Yours the moment you pay.

Launch Promo · First Edition

The repairs you can do yourself, and the ones they overcharge you for

  • The complete 136-page illustrated PDF
  • 90 chapters across seven parts
  • The Limits section closing every chapter
  • The Glovebox Card — your car's numbers on one page
  • The Counter Script — the sentences to say, on one page
  • Quick Reference — every common upsell and the question that ends it
  • A glossary of every shop term used in the book
  • Reads on phone, tablet or laptop — and the cards print
$47 $27
Launch promo
Get the Book — $47 $27
Instant download · Yours forever
Secure checkout by Gumroad
Visa · Mastercard · Amex · PayPal
VII · Questions

Before you buy

Are these real, or is this just a book telling me all mechanics are crooks?

Every practice in here is one I have watched happen, been asked to perform, or had to undo afterwards — and the book says plainly which of them are outright dishonest, which are grey, and which are legitimate services sold to the wrong car. The first line of the introduction is that this is not an attack on mechanics, because I am one. Two of the seven parts are about paying a shop properly and finding one worth paying. A book that only taught self-reliance would cost you more than it saved.

Your videos are free — why would I buy this?

A video has to be short and has to be about one thing. The book is all ninety in the order the problems actually arrive, with the reasoning underneath each one and The Limits at the end of every chapter. The chapters also lean on each other, which a playlist cannot do: chapter 2 on book time comes back in chapter 83 on reading an estimate, because they are the same idea at the two ends of a transaction.

I am not handy. Is Part Five going to be over my head?

The sixteen jobs in Part Five were chosen because they carry the largest markup and the smallest skill requirement. An engine air filter is four minutes and no tools. Wiper blades, cabin filter, bulbs and battery terminals are the same evening. Oil, plugs, brake pads and a serpentine belt take longer to read about than to do. Nothing in that part needs a garage or a lift or twenty years of experience — it needs about $250 of tools, bought once, listed in chapter 55. And the jobs that should not be improvised in a driveway are in Part Six instead, named as such.

Why only $27?

Because it is worth more to me that a lot of people walk into a shop knowing the questions than that a few pay a premium for them. $27 is the launch price against $47. It is less than a single air filter upsell, and a very long way less than one transmission flush you did not need.

What format is it, and how do I get it?

A single illustrated PDF, 136 pages, delivered by Gumroad the moment you pay. It opens on a phone, a tablet or a laptop, and the Glovebox Card, the Counter Script and the Quick Reference table are laid out as pages you can print and keep in the car. No app, no login to remember, no subscription.

Does it only apply to American shops and American cars?

The business model is the same wherever labour is sold by the hour, and so are the upsells — the flat-rate guides, the free inspection, the filter in the drawer travel everywhere. What varies is the money and the law: dollar figures are indicative US prices at the time of writing, and the consumer protections cited are American. Every chapter that turns on a legal right tells you to check the rule in your own state, province or country, and chapter 12 is specifically about what Japanese shaken inspection does differently.

My car is under warranty. Does the dealer have to do the work?

Chapter 9 is that question in full, including the Magnuson-Moss Warranty Act and what a dealer can and cannot require of you. The short version is that the answer is more in your favour than most people are led to believe, and the paperwork you need to keep in order to rely on it is one line in the folder from chapter 90. It is a general explanation, not legal advice — verify the position where you live before you rely on it in a dispute.

Get the Book — $47 $27
Instant download · Yours forever
Stop Getting Scammed at the Shop
Wait — one thing

Less than one air filter you did not need.

Ninety chapters on how the shop makes its money, the upsells one by one, and the jobs you can do in your own driveway — $27 during launch instead of $47. Most of what happens at that counter is not a mystery. It is a business model.

Get the Book — $47 $27
Instant download · Yours forever
or see what's inside →