CRC Emissions Test Formula
Where to Buy
| Retailer | Price | Last seen | Buy |
|---|---|---|---|
Z Zoro Tools Industrial Supplies | $11.71 | Aug 16, 2022, may have changed | Buy Now |
 Amazon Sold by Carlosâs Mixes & Matches LLC | $12.99 | Sep 21, 2023, may have changed | Buy Now |
 Zoro | $13.35 | Aug 13, 2024, may have changed | Buy Now |
T Truegether Sold by MSM Automotive | $13.38 | Aug 1, 2023, may have changed | Buy Now |
A Autoplicity.com | $13.82 | Aug 14, 2024, may have changed | Buy Now |
Prices are collected from retailer listings; each row shows the date we last saw that price. Return and shipping terms are each store's standard policy from our retailer research (April 2026). Some products and categories have different terms, so check with the store before you buy.
Used & Refurbished
✨ See 2 used & refurbished prices with ShopSavvy ProGet the app →Price history summary
Lowest new price we recorded at major retailers (Amazon, Walmart, Best Buy, Target, The Home Depot and Lowes) in the last 90 days: $15.99 at Amazon on Aug 19, 2026.
Range over the last 12 months: $11.49 (retailers/amazon, Jan 30, 2026) to $21.57 (retailers/amazon, Dec 5, 2025). Based on 78 recorded prices since Oct 21, 2025 for offers sold by these retailers themselves (not marketplace sellers). Summary as of Oct 19, 2026.
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Pros
- •Effectively super-cleans the fuel system, reducing emissions.
- •According to multiple reviews, it has helped users pass emissions tests or smog checks.
- •Can temporarily reset check engine codes, aiding in diagnostic efforts.
- •Easy to use with clear instructions, leading to positive test outcomes.
- •May improve chances of passing emissions for older vehicles with buildup issues.
- •Some users have reported noticeable improvement in emissions and catalytic converter performance.
- •Shows promise as a cost-effective way to maintain emissions compliance in high-mileage cars.
- •Reassures that using premium fuel together with the product might enhance results.
- •Can help clear warning lights related to catalytic performance.
- •Users have experienced passing emissions shortly after using, with some noting ongoing use for better results.
Cons
- •Not a guaranteed solution for mechanical issues or damaged catalytic converters.
- •Does not always meet expectations, with some users reporting it failed to clear codes or improve emissions.
- •Recurring check engine lights or codes suggest limited long-term effectiveness in some cases.
- •Some reviews mention the catalytic converter code reappearing after temporary clearing.
- •May require multiple drive cycles and patience to see results.
- •Not suitable for very old or heavily damaged systems, like a 1989 Ford F250.
- •Effectiveness can vary depending on vehicle condition and age.
- •Might produce only short-term improvements, with the system returning to previous state over time.
- •Some users experienced oil consumption or internal issues unrelated to the product.
- •Limited to certain vehicle types; not effective universally.
Bottom Line
This product appears to be a useful, budget-friendly option for temporarily improving emissions and clearing diagnostic trouble codes, especially in high-mileage vehicles. However, its effectiveness is variable—it's not a fix-all for mechanical problems or severely damaged systems. If you're consistently failing emissions tests or have known catalytic converter issues, considering a professional repair or a more comprehensive solution might be your best bet. For those aiming for quick, cost-effective emissions help, it’s worth trying, but keep expectations realistic.
What Reviewers Are Saying
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Discussion
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