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Red Line (60103) Complete SI-1 Fuel System Cleaner - 15 Ounce

4.6 out of 5 stars 441 customer reviews
| 48 answered questions

List Price: $13.16
Price: $12.39 & FREE Shipping on orders over $35. Details
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15 Ounce
  • Enter your model number above to make sure this fits.
  • Cleans to nearly 100 percent efficiency in one treatment
  • Reduces need for octane by up to two points
  • Contains synthetic upper cylinder lubricant
  • Safe for continual use
  • Use one bottle per tank for most effective treatment of neglected vehicle
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37 new from $11.38
Special Shipping Information: This product may not be available for 1 or 2 day shipping due to federal regulations that require it to ship via ground ship methods only. This product can only be shipped within the 48 contiguous states.

$12.39 & FREE Shipping on orders over $35. Details In Stock. Ships from and sold by Amazon.com.

Frequently Bought Together

  • Red Line (60103) Complete SI-1 Fuel System Cleaner - 15 Ounce
  • +
  • Red Line 80204 Water Wetter - 12 oz.
Total price: $25.91
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Product Information

Size:15 Ounce

Technical Details

Brand Red Line Oil
Item Weight 1.7 pounds
Product Dimensions 2.8 x 2.8 x 9.5 inches
Origin USA
Item model number 60103
Manufacturer Part Number 60103
OEM Part Number 60103
Vehicle Service Type all-terrain-vehicles, utility-vehicles, street-sport-motorcycles, off-road-motorcycles, street-cruiser-motorcycles, street-touring-motorcycles, street-motor-scooters, snowmobiles, marine-personal-craft

Additional Information

ASIN B000CPI5Z0
Customer Reviews
4.6 out of 5 stars 441 customer reviews

4.6 out of 5 stars
Best Sellers Rank #570 in Automotive (See top 100)
#3 in Automotive > Motorcycle & ATV > Fluids & Maintenance > Cleaners > Fuel System Cleaners
#46 in Automotive > Oils & Fluids
Shipping Weight 15.2 ounces (View shipping rates and policies)
Domestic Shipping Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
International Shipping This item is not eligible for international shipping. Learn More
Date First Available July 3, 2009

Warranty & Support

Warranty, Parts:Parts

Product Description

Size: 15 Ounce

Concentrated, detergent-based fuel additive cleans injectors, carburetors, valves and combustion chamber deposits with a concentrated blend of the most powerful high-temp and low-temp detergents available.

Customer Reviews

Top Customer Reviews

Size: 15 Ounce
Short version:

Among all fuel system cleaners I'm aware of, Redline SI-1 contains the highest quantity per dollar (based on manufacturer MSDS) of the critical fuel-system-cleaning compounds known as polyether amines (PEA). Primarily for this reason I believe SI-1 to be the best available and most cost-effective fuel system cleaner product at retail pricing. [...].

In my case it has not been necessary to use Redline's recommended quantity of approximately 3 oz per fill-up. The effects of 1 oz per fill-up are indistinguishable in terms of tested results (see my basis for this statement below). This results in an approximate cost of $0.35/tank or less than a tenth of a penny per mile. A full case at this usage rate is enough to treat 180 full tanks of fuel or to last approximately 80,000 miles. (Figures based 15gal/tank, 25-35mpg).

Long version:

As far as I know, every effective fuel system cleaner on the market uses a class of compounds known as polyether amines (PEA), in varying proportions, to effectively clean deposits from fuel system components, and particularly from fuel injectors, which can quickly impact engine efficiency and performance when not operating correctly. My understanding is that these compounds were first developed by Chevron and sold under the Techron name, and have since been made available to other blenders of fuel treatment products. Until recently BG 44K, Chevron Techron Concentrate, Gumout Regane Fuel System Cleaner, Amsoil P.I. Performance Improver Concentrate, and Redline SI-1 (among others) listed polyether amines on their Material Safety Data Sheets (MSDS) in proportions varying from approximately 25% to 50%.
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37 Comments 422 of 447 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 15 Ounce, (Pack of 12) Verified Purchase
Redline SI-1 is currently the best fuel system cleaner that is readily available. One of the best examples supporting this statement is represented by the condition of my 2003 S2000's engine. I bought the car new and I'm responsible for essentially every one of the 99,700 miles on the clock. The earlier S2000s (1999-2003 model years - called the AP1) are notorious for oil consumption through the PCV valve (for a number of reasons), and as a consequence the intake manifold and throttle body will typically develop a nasty coat of carbon saturated goop. In contrast - the intake and throttle body of my S2000 could only be cleaner if I steam cleaned them (or ran a water/methanol injection system). I credit this product's use, in conjunction with using a top-shelf synthetic oil (Amsoil) with keeping my engine not only clean, but essentially free of wear. The last leak-down test performed on my engine (at 90,000 miles) showed less the 2% leak-down in all cylinders, and no more than 0.5% difference between all cylinders (1.25, 1.5, 1.5, 1.75 - cylinders 1-4). I do not drive my S2000 conservatively either, as it gets revved to 9000 RPM 2-3 times every time I drive the car - and my car is geared with a 4.44 final drive. Those are essentially 1/8th mile gears, and contribute to higher than normal RPMs in all gears, when compared to a stock S2000 - and significantly more RPMs on average than any conventional street car.

To give the proper perspective, the age of an engine is not simply a function of the number of miles driven, but as a function of how many average RPMs the engine turns per unit distance (measured in the engines average RPMs turned per mile driven).
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Comment 51 of 52 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 15 Ounce, (Pack of 12) Verified Purchase
Short version:

Among all fuel system cleaners I'm aware of, Redline SI-1 contains the highest quantity per dollar (based on manufacturer MSDS) of the critical fuel-system-cleaning compounds known as polyether amines (PEA). Primarily for this reason I believe SI-1 to be the best available and most cost-effective fuel system cleaner product at retail pricing. At the current price per bottle when bought by the case right here on Amazon ($5.30) it is a bargain (12/15/09 edit: the price here has almost doubled since I wrote this and it is now, unfortunately, far from a bargain).

In my case it has not been necessary to use Redline's recommended quantity of approximately 3 oz per fill-up. The effects of 1 oz per fill-up are indistinguishable in terms of tested results (see my basis for this statement below). This results in an approximate cost of $0.35/tank or less than a tenth of a penny per mile. A full case at this usage rate is enough to treat 180 full tanks of fuel or to last approximately 80,000 miles. (Figures based 15gal/tank, 25-35mpg).

Long version:

As far as I know, every effective fuel system cleaner on the market uses a class of compounds known as polyether amines (PEA), in varying proportions, to effectively clean deposits from fuel system components, and particularly from fuel injectors, which can quickly impact engine efficiency and performance when not operating correctly. My understanding is that these compounds were first developed by Chevron and sold under the Techron name, and have since been made available to other blenders of fuel treatment products. Until recently BG 44K, Chevron Techron Concentrate, Gumout Regane Fuel System Cleaner, Amsoil P.I.
Read more ›
7 Comments 75 of 80 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Red Line (60103) Complete SI-1 Fuel System Cleaner - 15 Ounce
This item: Red Line (60103) Complete SI-1 Fuel System Cleaner - 15 Ounce
Price: $12.39
Ships from and sold by Amazon.com