Red Line SI-1 Complete Fuel System Cleaner
15 oz
Price as of 2026-06-05. Check Amazon for the current price.
Quick Decision
Price Intelligence
- Budget:$7–$11
- Mid-range:$11–$24← You are here
- Premium:$24+
Is This Right For You?
- •Those who want a top-rated option — in the top 1% of Fuel Additives by rating
- •Risk-averse buyers — 9,216+ reviews give a highly reliable picture
- •Lucas Oil 10003 Fuel Treatment — 34% cheaper at $12 (Score A+)
📊 Based on data analysis of 15 products in this category.
Mubboo Score: A-
How we calculate the Mubboo Score
Quality (45%): customer rating, normalized to a 10-point scale
Popularity (35%): review volume vs the category leader, log-scaled
Value (20%): price position vs other Fuel Additives
Computed from live Amazon rating, review count, and price across 15 Fuel Additives available to US consumers · last refreshed 2026-06-05.
How It Compares
This Product Red Line SI-1 Complete Fuel System Cleaner | Most Popular Lucas Oil 10003 Fuel Treatment | Best Rated STA-BIL Storage Fuel Stabilizer | Best Value Hot Shot's Secret Hot Shot’s Secret Everyday Diesel Treatment | |
|---|---|---|---|---|
| Price | $17.47 | $11.59 | $12.48 | $18.96 |
| Rating | 4.8/5 | 4.8/5 | 4.8/5 | 4.7/5 |
| Reviews | 9,216 | 24,615 | 14,291 | 8,723 |
| Mubboo Score | A- | A+ | A | A- |
Quick Specs
- Size
- 15 Fl Oz (Pack of 1)
- Item Form
- Oil
- Unit Count
- 15.0 Fluid Ounces
- Item Volume
- 443 Milliliters
- Item Weight
- 16 ounces
- Part Number
- 60103
- Manufacturer
- Red Line
- Model Number
- (60103)
What buyers say about Fuel Additives
Themes from buyer reviews across this category — not review data for this specific model.
For maximum cleaning power, choose a product with high PEA content like Red Line SI-1 or Chevron Techron, but expect to use multiple treatments for severe deposits. For long-term storage, use a dedicated stabilizer such as STA-BIL or Star Tron to prevent gum and starting problems.
- Improved engine performance and smoothness
- Effective fuel system cleaning and deposit removal
- Ease of use
- Fuel economy improvement
- Long-term fuel stabilization for storage
- High price and recent price increases
- Packaging issues during shipping
Expert Picks in Fuel Additives
- Lucas LUC10013 Fuel Treatment — Best Overall
- Red Line Complete Fuel System Cleaner — Best Value
- Star Tron Enzyme Fuel Treatment Concentrate — Honorable Mention
- Opti-Lube XPD Formula Diesel Fuel Additive — Best for Diesel Engines
- Red Line SI-1 Complete Fuel System Cleaner — Strongest PEA Cleaner
- BG Platinum 44K Fuel System Cleaner — Professional Grade
- CRC 1-Tank Power Renew — High PEA Concentration
- Chevron Techron Concentrate Plus — Best for Regular Maintenance
Category recommendations from independent expert publications. Source links in References.
Related Video Reviews
- 📹 We Tested the Most Popular Fuel Additives — One Clear Winner! — Unknown (automotive testing channel)
- 📹 19X Difference In Deposits! [Engine Test Results] — The Motor Oil Geek
Key Features
- ✦DESIGNED TO EXCEED EXPECTATIONS: Red Line complete SI-1 fuel system cleaner is a premium fuel additive, providing an effective fuel treatment solution to clean and prevent corrosio…
- ✦PERFORM AND PROTECT: Fuel additive cleans injectors, carburetors, valve and combustion chamber deposits with a powerful, concentrated blend of high-temp and low-temp detergents
- ✦EFFICIENT FUEL BURN: A gas treatment that enhances gasoline stability, while reducing the build up of gum and varnish formation, leading to smoother operation and increased power o…
- ✦EASY TO USE: Use one bottle of Redline Fuel System Cleaner per tank for most effective treatment, additive cleans nearly 100% efficiency in one treatment
- ✦ENAHNCED ENGINE EFFCIENCY: Experience improved fuel economy and engine performance with Red Line 60103 SI-1 Complete Fuel System Cleaner, as it effectively removes deposits, for en…
Source: product listing on Amazon.
If not the SI-1 Complete Fuel System Cleaner, consider these
Featured in Our Reviews
Bottom Line
Red Line SI-1 Complete Fuel System Cleaner earns Mubboo Score A-. Priced at $17 — a mid-range option, below the category average of $18. Rated 4.8/5 from 9,216+ reviews. Strong buy if: those who want a top-rated option, risk-averse buyers.
Frequently Asked Questions
Is the Red Line SI-1 Complete Fuel System Cleaner worth buying in 2026?
It earns a Mubboo Score of A-, with a 4.8/5 rating from 9,216 reviews — better than 100% of Fuel Additives we track.
How much does the Red Line SI-1 Complete Fuel System Cleaner cost?
It is currently $17.47 — mid-tier pricing for Fuel Additives.
How does the SI-1 Complete Fuel System Cleaner compare to other Fuel Additives?
The category's most-reviewed alternative is the Lucas Oil 10003 Fuel Treatment (4.8/5, 24,615 reviews, $11.59). The SI-1 Complete Fuel System Cleaner carries a Mubboo Score of A- vs A+.
Sources & References
Products available through US retailers. Prices in USD. Sales tax varies by state and is not included.
Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-06-05) and may change.