Stop clicking the gas pump!
Stop clicking the gas pump!
3:33

Stop clicking the gas pump!

Cars
[MUSIC] [BLANK_AUDIO] Hey, folks. Cooley here with another one of your questions about high tech cars and modern driving. This one's about the gas tank and what you put in it. And how much. Jacob L. in Pittsburgh says, I've been hearing from friends that putting more gas in your car after the first click of the pump can damage your vehicle over time. Is it true? Also, thanks again. Because of your YouTube video review of the 2014 Mazda3, I actually bought one. Good going. We love our Mazda3s, and the new one just came out, by the way. I hope you saw those videos as well. Now, let's get down to over filling your tank. Or, is it over filling? This is the question you're asking about. Topping off is controversial stuff. And, there are four reasons why I think people argue over it. Four reasons that give me pause to not do it. What we're talking about here is click, click, click, over and over. After the first click when the pump says I'm full, many will tell you it's a waste of money if you keep pushing past the first click you could be overfilling at the top of your fuel fill port, and that just runs down the little drain there at the bottom of that port and to a tube underneath your car. A lot of folks don't realize they're peeing gas on the ground and under their car. Not a lot, but why throw that away? Also on some pumps that fuel may be sucked back in to the nozzle that handles evaporative recovery hardware, taking it back into the tank. So you're paying to give the gas station their own gas back. It's not a ton of money, but why waste it, right? The next concern, and the big one to me, is damage to your evaporative fume recovery system on your vehicle. The evaporative recovery system has been in all U.S. destination cars since 1971 and what it does is make sure that the gas in the tank does not just evaporate fumes out into the air. Those fumes have to be controlled and recovered in a system of tubes, valves, sensors, and this canister that charcoal in it. That system can be damaged if it is forced to drink some liquid fuel, that an overfill could cause. Now, not every car runs that risk Depending how the system's designed. But why risk it? If you **** that thing up, you're gonna get a check engine light, start failing emissions tests, and be facing a few hundred to a thousand dollar or so bill to repair it. That's the one that keeps me awake the most. Overfilling also has the potential to pollute the environment again a little bit. But why do it all of that evaporative recovery stuff in your car and built into the fuel filler handle is meant to capture just about any Vapors and fumes that come off the fueling process. But when you start over filling and splashing fuel around, or dumping it on the ground, you've defeated the purpose. And the last thing to think about is a lot of folks use the first click as their benchmark for refill to do MPG measurements, because they don't trust the car's MPG gauge. I can't tell you how many folks write into me and tell me, I don't trust that thing, I do my own numbers. So they refill each time to the first click as they're standard benchmark and then compare the amount of fuel that dispensed versus the number of miles on the trip odometer. But if you keep forcing fuel in there, I'm convinced you don't get a good benchmark of how much fuel you used since the last time. So bottom line, be satisfied with the first click. I don't think most cars get you a whole lot more range if you force feed them a whole lot more gas and run into all these potential issues. [SOUND]

Up Next

Seen the New 2023 Prius? Here's Why It's Turning Heads
2023-prius-reveal-b-roll-toyota-mp4-00-00-39-19-still001

Up Next

Seen the New 2023 Prius? Here's Why It's Turning Heads

The Bestselling EVs of 2022 So Far
best-selling-evs-2022-00-02-00-17-still233

The Bestselling EVs of 2022 So Far

Best Dash Cams: A Buying Guide
cnet-buyers-guide-dashcams-2022-00-00-27-07-still086

Best Dash Cams: A Buying Guide

GM's Electric Pickups Head On: Comparing the Sierra EV to the Silverado EV
b-roll-gmc-sierra-ev-denali-edition-1-gmc-mp4-00-03-33-14-still003

GM's Electric Pickups Head On: Comparing the Sierra EV to the Silverado EV

Meet a Mind-Bending Hybrid: The Sono Sion Solar-Grid EV
sono-sion-00-09-01-10-still220

Meet a Mind-Bending Hybrid: The Sono Sion Solar-Grid EV

These Are the Cars That Qualify Now for the New Tax Credit
large-15747-2023-id-4-volkswagen

These Are the Cars That Qualify Now for the New Tax Credit

Don't Buy an EV Until You See the Most Important Ones Coming in 2023
221007-yt-electrified-best-evs-coming-in-2023-3

Don't Buy an EV Until You See the Most Important Ones Coming in 2023

I Don't Own an Electric Car and Here's Why
15851-id-buzzdrivingfootageeuropeanmodel-volkswagen-mp4-00-02-04-02-still002

I Don't Own an Electric Car and Here's Why

Where and When You Should Charge Your Electric Car
title-00-00-06-19-still001

Where and When You Should Charge Your Electric Car

Tech Shows

The Apple Core
apple-core-w

The Apple Core

Alphabet City
alphabet-city-w

Alphabet City

CNET Top 5
cnet-top-5-w

CNET Top 5

The Daily Charge
dc-site-1color-logo.png

The Daily Charge

What the Future
what-the-future-w

What the Future

Tech Today
tech-today-w

Tech Today

Latest News All latest news

Rad Power Bikes Addresses Gap in Micro-Mobility With the RadTrike
radtrike-00-01-12-05-still001

Rad Power Bikes Addresses Gap in Micro-Mobility With the RadTrike

Best Streaming Devices of 2022
best-streamers-2022-thumb

Best Streaming Devices of 2022

Forget the Kids. These Toys Make Great Adult Gifts
bridgetnerf

Forget the Kids. These Toys Make Great Adult Gifts

See Why the Semi May Be Tesla's Most Important Vehicle
tesla-semi-00-02-40-12-still001

See Why the Semi May Be Tesla's Most Important Vehicle

How to Create Holiday Greeting Cards Using Keynote
ipadgreetingcard-site-thumb

How to Create Holiday Greeting Cards Using Keynote

Watch Elon Musk's Semi Event in 9 Minutes
tesla-sb-v1-00-00-02-01-still001.png

Watch Elon Musk's Semi Event in 9 Minutes

Most Popular All most popular

Forget the Kids. These Toys Make Great Adult Gifts
bridgetnerf

Forget the Kids. These Toys Make Great Adult Gifts

Elon Musk Shows Latest Neuralink Demo of Monkey Typing with its Mind
neuralmonkey

Elon Musk Shows Latest Neuralink Demo of Monkey Typing with its Mind

Watch Elon Musk's Semi Event in 9 Minutes
tesla-sb-v1-00-00-02-01-still001.png

Watch Elon Musk's Semi Event in 9 Minutes

EVs vs. Gas Engines: We Do the Math on Carbon Emissions
evs-exposed-still

EVs vs. Gas Engines: We Do the Math on Carbon Emissions

Best Android Phones of 2022: Samsung, Google, OnePlus and More
1203459317449832-laz1jqjqlhclzhrpcncs-height640.png

Best Android Phones of 2022: Samsung, Google, OnePlus and More

2022 Ford Bronco Raptor: This Big Bronco Is Here
ford-bronco-raptor-still-v1

2022 Ford Bronco Raptor: This Big Bronco Is Here

Latest Products All latest products

Rad Power Bikes Addresses Gap in Micro-Mobility With the RadTrike
radtrike-00-01-12-05-still001

Rad Power Bikes Addresses Gap in Micro-Mobility With the RadTrike

See Why the Semi May Be Tesla's Most Important Vehicle
tesla-semi-00-02-40-12-still001

See Why the Semi May Be Tesla's Most Important Vehicle

First Look at Archer's Midnight Air Taxi
midnight

First Look at Archer's Midnight Air Taxi

Holoride Hands-On: VR in the Car Is Like a Disney Ride
holoride-00-00-03-12-still003

Holoride Hands-On: VR in the Car Is Like a Disney Ride

Hands-on With All of Microsoft's New Surface Devices
surfacepro9-event-00-00-04-05-still004

Hands-on With All of Microsoft's New Surface Devices

Microsoft Introduces Surface Studio 2 Plus
surfacestudio

Microsoft Introduces Surface Studio 2 Plus

Latest How To All how to videos

MacOS Ventura Continuity Camera Turns Your iPhone Into a Webcam
1203246975312353-pnmdl8bwygpxcjffhlcf-height640.png

MacOS Ventura Continuity Camera Turns Your iPhone Into a Webcam

How to Clean Your Keyboard's Sticky Keys
3keyboards

How to Clean Your Keyboard's Sticky Keys

How to Play Games from PlayStation Plus on PC
psstill

How to Play Games from PlayStation Plus on PC

How to Delete or Disable Your Instagram Account
phoneonorange

How to Delete or Disable Your Instagram Account

Fix Your iPhone Screen With Apple's Self-Service Repair Kit
dsc00641

Fix Your iPhone Screen With Apple's Self-Service Repair Kit

How to Buy a Budget Laptop in 2022
budgetlaptops-00-08-35-15-still001

How to Buy a Budget Laptop in 2022