
Royal Purple 18000 Fuel Injector Cleaner - 6 fl. oz.
- Restores fuel economy
- Stabilizes ethanol
- Maximizes horsepower
- Improves responsiveness
- For use in both gasoline and diesel engines
Mubboo Value Score: 6.7/10
How it stacks up
Rated 4.6/5 — better than 23% of 53 Fuel Additives we track. Budget-tier pricing at $6.48.
Head-to-Head vs Category Leader
| Royal Purple | Lucas Oil (Leader) | |
|---|---|---|
| Price | $6.48 | $9.89 |
| Rating | 4.6/5 | 4.8/5 |
| Reviews | 3,314 | 24,615 |
| Mubboo Score | 6.7/10 | 9.0/10 |
The Royal Purple 18000 Fuel Injector Cleaner - 6 fl. oz. offers comparable quality at 34% lower price.
Quick Specs
- Model
- 18000
- Lift Type
- Power
- Item Weight
- 6 ounces
- Manufacturer
- Royal Purple
- OEM Part Number
- 18000
- Customer Reviews
- 4.6 out of 5 stars
- Special Features
- Concentrated
- Best Sellers Rank
- #763 in Automotive (See Top 100 in Automotive)#6 in Fuel System Cleaners
What reviewers say
Synthesized from 40 reviews · 100% verified purchases.
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.
Rating reliability
About Royal Purple
- 17 products in our database
- Average rating: 4.8/5 across all products
- Price range: $6.48 – $123.99
- Categories: Fuel Additives, Motor Oil
Other Fuel Additives




Frequently Asked Questions
Is the Royal Purple Royal Purple 18000 Fuel Injector Cleaner - 6 fl. oz. worth buying in 2026?
It earns a Mubboo Score of 6.7/10, with a 4.6/5 rating from 3,314 reviews — better than 23% of Fuel Additives we track.
How much does the Royal Purple Royal Purple 18000 Fuel Injector Cleaner cost?
It is currently $6.48 — budget-tier pricing for Fuel Additives.
How does it compare to the top-rated Fuel Additives?
The Royal Purple 18000 Fuel Injector Cleaner - 6 fl. oz. offers comparable quality at 34% lower price.
Sources & References
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