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Mechanic In A Bottle

Mechanic in a Bottle Fuel System Fix All Fuel Additive, 8 oz bottle

4.6 stars out of 237 reviews
(4.6)|
237 ratings
Mechanic in a Bottle Fuel System Fix All Fuel Additive, 8 oz bottleMechanic in a Bottle Fuel System Fix All Fuel Additive 8 oz bottle3 pack Mechanic in a Bottle Fuel System Fix All Fuel Additive 8 oz bottle
Pack Size:Single
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Key item features

  • Synthetic Additive: Synthetic fuel additive that works in power equipment with 2 and 4-cycle engines
  • Alcohol-Free: Product does not contain alcohol, ensuring safe use in various engines
  • Ethanol Solution: Fixes ethanol issues, preventing engine problems caused by ethanol-blended fuels
  • Cost-Effective: Stops costly repairs by maintaining and cleaning the fuel system
  • Comprehensive Cleaning: Cleans carburetors and injectors without the need to remove fuel, removing all varnish in the fuel system
  • Fuel Revitalization: Revitalizes stale gasoline and rejuvenates old fuel, ensuring efficient engine performance
  • Component Revival: Revives rubber and plastic parts, extending the life of engine components
  • Water Removal: Removes water by absorbing it, allowing it to pass harmlessly through the fuel system and burn in the engine
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Current price is $7.8498.0 ¢/fl oz
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About this item

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Customer ratings & reviews

4.6 out of 5 stars
stars237 ratings107 reviews
How item rating is calculated
  1. 5 stars79% (187)
  2. 4 stars10% (23)
  3. 3 stars5% (13)
  4. 2 stars3% (7)
  5. 1 star3% (7)

Reviews summary

Pros
  • : Works well with gas containing ethynol.
  • : Provides improved engine performance and cleaning.
  • : Offers similar value to other stores.
  • : Restores functionality in struggling lawn mowers.
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Showing 1-3 of 107 reviews

Oct 26, 2025
Rex
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Mechanic in a Bottle fuel additive: Works

This is the only fuel additive I ever used that actually worked. My motorcycles 1990 Honda Shadow 1100 and 1985 Shadow 700 had set for year and they wouldn't idle smoothly and were hard to start. I started to clean the carburetor, but when I last cleaned the carburetors I had them set and running perfectly and It is a big job. I also needed a fuel additive to deal with Ethanol in gas…which causes most of the noted problems as the fuel ages. I tried the additive and it actually worked great. Now I treat all the gas vehicles I have ( power washer, ATV..) with it with the result: It works. Note: Don't get the undiluted additive on paint on bike it will damage the paint; doesn't harm fuel lines. Very happy with Mechanic in a Bottle as well as fuel stabilizer to protect against Ethanol additive to fuel.

Helpful?20YMSQO2DS0J51471688
Jan 14, 2026
Vern
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Mechanic in a bottle is a good name

I ran across this when I was having difficulty with getting a lawn tractor to run right. I used as directed and before long it was really running well. I don't know what's in this that made the difference but a couple other additives had not done anything.

Helpful?20YMSQO2DS0J51471688
Sep 23, 2025
Ralph
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Worked for me.

My lawnmower engine was surging and not idling properly. I added this product to the fuel tank and ran the engine about 20 minutes, problem solved. Still running fine after 2 months.

Helpful?20YMSQO2DS0J51471688