STP Ultra 5-in-1 Fuel System Cleaner, Deep Clean for Engine, Restore Power & Fuel Economy, 12 oz
STP Ultra 5-in-1 Fuel System Cleaner, Deep Clean for Engine, Restore Power & Fuel Economy, 12 oz
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STP Ultra 5-in-1 Fuel System Cleaner, Deep Clean for Engine, Restore Power & Fuel Economy, 12 oz

4.7 stars out of 291 reviews
(4.7)|
291 ratings
STP Ultra 5-in-1 Fuel System Cleaner, Deep Clean for Engine, Restore Power & Fuel Economy, 12 ozSTP R Ultra 5 in 1 Fuel System Cleaner 12oz2 pack STP R Ultra 5 in 1 Fuel System Cleaner 12 OZ12 pack STP R Ultra 5 in 1 Fuel System Cleaner 12oz6 pack STP R Ultra 5 in 1 Fuel System Cleaner 12oz24 pack STP R Ultra 5 in 1 Fuel System Cleaner 12oz3 pack STP R Ultra 5 in 1 Fuel System Cleaner 12oz
Pack Size:Single

Key item features

  • Deep Cleaning: This 12 oz STP Ultra 5-in-1 Fuel System Cleaner deep cleans the entire fuel system, utilizing advanced synthetic technology to remove harmful deposits.
  • Advanced Detergents: Features a blend of PEA and PIBA detergents to effectively remove deposits and reduce engine friction in any gasoline engine.
  • Enhanced Cleaning: Contains three times the amount of cleaning agents compared to the leading premium gasoline, ensuring a thorough clean for the fuel intake system.
  • Usage Instructions: Pour the entire 12 oz bottle into a vehicle gas tank that is at least half full for optimal performance.
  • Treatment Frequency: For best vehicle performance, use this STP fuel additive every 4,000 miles.
  • Fuel Capacity: One 12 fl. oz. bottle is designed to treat up to 35 gallons of gasoline.
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Current price is $10.7889.8 ¢/fl oz
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Subscribe, Your usuals, on your schedule, Save time and stay stocked!, $10.78
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STP Ultra 5-in-1 Fuel System Cleaner, Deep Clean for Engine, Restore Power & Fuel Economy, 12 oz $10.78 89.8 ¢/fl oz

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4.7 out of 5 Stars. 291 reviews

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Customer ratings & reviews

4.7 out of 5 stars
stars291 ratings163 reviews
How item rating is calculated
  1. 5 stars82% (239)
  2. 4 stars11% (32)
  3. 3 stars4% (11)
  4. 2 stars0% (1)
  5. 1 star3% (8)

Reviews summary

Pros
  • : Enhances vehicle's acceleration and overall performance.
  • : Operates with minimal vibration and noise.
  • : Improves fuel efficiency with increased mileage.
  • : Allows for effortless fuel addition.
  • : Enhances engine operation and fuel efficiency.
  • : Increases gas mileage and smoothes car performance.
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Showing 1-3 of 163 reviews

Aug 25, 2025
Walmart customer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Fixed a starting issue nothing else could.

I bought a low mileage used truck 2018. Ever since then, it took several cyclings of the ignition to prime the fuel pump before the engine would start easily. I'd tried some other fuel injector cleaners, and replaced the fuel pump (which it needed anyway), with not much change. After the truck was warmed up, it always started right up, and it always ran great when driving. So I had no idea where the problem was, having no obd2 codes. Just this January, I put two bottles of this in my 34 gallon tank. I believe these bottles say they treat up to 26 gallons per bottle, so after I ran the fuel level down a bit, I added about five more gallons of gas so as not to run it overtreated too much. By the time the tank was almost empty, my truck started easily on one turn of the key. Now it starts instantly, faster than any vehicle I've ever owned, new or used. This contains a substantial amount of PEA, according to the sds document I read, and I only wish I'd treated this truck with it the day I bought it. That would've saved me a lot of troubleshooting and efforts to fix an easily remedied problem.

Helpful?0TLIKIQR8AHL49850173
Apr 25, 2025
larry
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

I just started using the product and actually my check engine light came on I'm thinking or hoping that that's a temporary thing as part of the cleaning process for the catalytic converter and the fuel system entirely with those five points of cleaning give it some time before you ask for reviews to get a fair assessment of the products five-part cleaning solutions

Helpful?0TLIKIQR8AHL49850173
Jun 28, 2025
Jonathan
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Use STP fuel injector cleaner FIRST!!!

My 2014 Dodge Grand Caravan's "check engine" light came on. The computer code was 306, "misfire in cylinder 6." I dumped a bottle of STP fuel injector cleaner in the tank and it looks like that took care of it! Thank the Lord!

Helpful?0TLIKIQR8AHL49850173