Mechanic in a Bottle Fuel System Fix All Fuel Additive, 4 oz bottle
Mechanic in a Bottle Fuel System Fix All Fuel Additive, 4 oz bottle
Hero image 0 of Mechanic in a Bottle Fuel System Fix All Fuel Additive, 4 oz bottle, 0 of 5

Mechanic in a Bottle Fuel System Fix All Fuel Additive, 4 oz bottle

4.7 stars out of 114 reviews
(4.7)|
114 ratings
Car
Check if this fits your vehicle

Key item features

  • Engine Restoration: Fixes poor or non-running engines by revitalizing stale fuel and cleaning carburetors without removal.
  • Ethanol Solution: Addresses ethanol issues and cleans carburetors and injectors without requiring their removal.
  • Fuel Revitalization: Revitalizes marginal gasoline and removes accumulated water, allowing it to pass harmlessly through the fuel system.
  • Component Rejuvenation: Revives rubber and plastic parts within the fuel system and removes hardened deposits and residue.
  • System Cleansing: Removes all varnish and carbon deposits, replaces Octane, and rejuvenates old fuel for efficient starting and optimal operation.
  • Alcohol-Free Formula: Features a no-alcohol formulation, making it suitable for power equipment with two- and four-cycle engines.
Generated by AI
Current price is Now $5.94
You save $3.05
was $8.99
$1.49/fl oz
Price when purchased online
  • Free 90-day returns
Subscribe, Your usuals, on your schedule, Save time and stay stocked!, $5.94
One-time purchase $5.94

How do you want your item?

Try 30 days of Free Shipping with Walmart+! Choose plan at checkout.
How do you want your item?
Columbus, 43215
Arrives by Tomorrow
Sold and shipped by Walmart.com
Free 90-day returns
This item is gift eligible

More seller options (3)

Starting from $12.75
walmart plus

Get free delivery, shipping and more*

*Restrictions apply
Try Walmart+ now

About this item

Product details

Specifications

Directions

Warranty

Warnings

Frequently bought together

Mechanic in a Bottle Fuel System Fix All Fuel Additive, 4 oz bottle $5.94 Was $8.99 $1.49/fl oz

Mechanic in a Bottle Fuel System Fix All Fuel Additive, 4 oz bottle
current price Now $5.94, Was $8.99
$1.49/fl oz
You save $3.05

Mechanic in a Bottle Fuel System Fix All Fuel Additive, 4 oz bottle

4.7 out of 5 Stars. 114 reviews

Best seller Venom Steel Premium Industrial Black Nitrile Gloves, One Size Fits Most, 50 ct $17.97 $17.97/count

Best seller
Venom Steel Premium Industrial Black Nitrile Gloves, One Size Fits Most, 50 ct
current price $17.97
$17.97/count

Venom Steel Premium Industrial Black Nitrile Gloves, One Size Fits Most, 50 ct

4.7 out of 5 Stars. 653 reviews

Rollback Great Value Lemon Scent Disinfecting Wipes, 1 Lbs, 5.5 oz, 75 Count $2.98 Was $3.77 $3.97/100 ct

Rollback
Great Value Lemon Scent Disinfecting Wipes, 1 Lbs, 5.5 oz, 75 Count
current price Now $2.98, Was $3.77
$3.97/100 ct
You save $0.79

Great Value Lemon Scent Disinfecting Wipes, 1 Lbs, 5.5 oz, 75 Count

4.8 out of 5 Stars. 20980 reviews

Rollback Rechargeable LED Work Light 12000mAh, 10000LM Portable Magnetic Work Light 320 LED, 4 Modes, Adjustable Stand for Mechanics, Camping, Fishing, Car Repair, Emergency Light for Power Outage $26.99 Was $79.99

Rollback
Rechargeable LED Work Light 12000mAh, 10000LM Portable Magnetic Work Light 320 LED, 4 Modes, Adjustable Stand for Mechanics, Camping, Fishing, Car Repair, Emergency Light for Power Outage
current price Now $26.99, Was $79.99
You save $53.00

Rechargeable LED Work Light 12000mAh, 10000LM Portable Magnetic Work Light 320 LED, 4 Modes, Adjustable Stand for Mechanics, Camping, Fishing, Car Repair, Emergency Light for Power Outage

4.6 out of 5 Stars. 262 reviews
Current price is
$53.88
was $110.72
Items may be delivered on different dates

Customer ratings & reviews

4.7 out of 5 stars
stars114 ratings56 reviews
How item rating is calculated

Reviews summary

Pros
  • : Easy to use with straightforward fuel tank filling.
Neutral
  • : Can be affordable, but also steep for certain features.
Generated by AI

Customer images

Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 56 reviews

Aug 14, 2025
ThatJerk
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

DONT BE SKEPTICAL! IT WORKS!

This product came "recommended" by a family member, but I was skeptical at first. I found that Walmart had it in-stock locally, and I ordered it. My John Deere riding mower (L120 with 20hp Briggs) was only firing on one cylinder. I thought I needed extensive engine repair, but it turns out that I only needed Mechanic In A Bottle. It was easy to use because you just pour the bottle into your fuel tank. I now suspect that I had a clogged carburetor jet or stuck valve, but whatever it was, it's fixed now! I'll now be adding this to my fuel system regularly for preventive maintenance. WORTH EVERY PENNY!

Helpful?1V7G4OKVKDUD38450707
Jul 30, 2025
anonymous
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

This is amazing!

I learned of this product while researching a way to fix my lawnmower. When I followed the simple directions for use in the gas, combined with a separate process that used a complimentary product to free up the cylinder, my frozen lawnmower came back to life! Whatever makes it renew the tubing in the fuel system definitely works, because the mower also stopped leaking gas!! Thank you Mechanic in a Bottle, you saved me money!!

Helpful?1V7G4OKVKDUD38450707
Sep 6, 2025
James
Item details
Multipack quantity: 1
Sold and shipped byAftermarket Direct
5 out of 5 stars review

Verified Purchase

Mechanic in a bottle

I have just recently heard about this Mechanic in a bottle product. I have a lawn mower that was not running well would run very slow and eventually stop. Put MIb with some new gas in the tank, tried after about 4 hrs, , no better. The next day one rip on the cord and runs like new. Will always keep this product on my shelf.

Helpful?1V7G4OKVKDUD38450707