![]() ![]() I noted after the professional cleaning that the accuracy of the reported mpg, when used to measure average mpg over each full tank of fuel, improved suddenly from a prior error of around -3% -5% (that is, the reported mpg was ~3-5% below the actual mpg, or typically just over 1mpg low) to an error as close to zero as I could measure (that is, usually between -1% and 1%, fluctuating above and below a perfect "match"). The car in question uses a Bosch engine management system that reports fuel injector data to an on-board computer, which then uses that data to calculate and report instantaneous and average mpg to the driver. I have been able to test the efficacy of fuel system cleaners in one of my own vehicles using a method I stumbled on after having its injectors professionally cleaned while out of the vehicle. Consequently it is one of the few remaining fuel system cleaner products that undoubtedly does contain PEA in significant quantity. As of this writing Redline's SI-1 MSDS still specifies that the product contains 30-50% PEA. Whether PEA is still contained in those products is a matter of uncertainty. Most of these products no longer list PEA on their MSDS, having changed their terminology to disguise the precise nature of their products' constituent components. 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%. Until recently BG 44K, Chevron Techron Concentrate, Gumout Regane Fuel System Cleaner, Amsoil P.I. 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. (Figures based 15gal/tank, 25-35mpg).Īs 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. ![]() A full case at this usage rate is enough to treat 180 full tanks of fuel or to last approximately 80,000 miles. This results in an approximate cost of $0.35/tank or less than a tenth of a penny per mile. The effects of 1 oz per fill-up are indistinguishable in terms of tested results (see my basis for this statement below). In my case it has not been necessary to use Redline's recommended quantity of approximately 3 oz per fill-up. 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). Primarily for this reason I believe SI-1 to be the best available and most cost-effective fuel system cleaner product at retail pricing. Here are links to Amazon (single bottle & full case), and below that is a copy/paste of the review text:Īnd, here is a link to the Red Line product data sheet with technical info:Īmong 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). Update Nov-2012: The price has skyrocketed to $10.95 per bottle and there is no discount for buying a full case. ![]() I found this very detailed review on Amazon, which also has the best price around for a case of 12 bottles of SI-1 (currently $74/case with free shipping, or $6.12 per bottle). ![]()
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