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Redline SI-1 Usage

7.2K views 3 replies 3 participants last post by  tylan71  
#1 ·
I bought a bottle of Redline SI-1 and the instructions are a bit ridiculous to me if anyone could weigh in I'd appreciate it. For initial use, it says to add a 15 oz bottle to an empty tank and fill up. It doesn't matter if its a 12 gallon tank or a 20 gallon tank which I think would be wasteful if you have the former. The dilution also makes a difference as far as effectiveness which would impact the latter. Anyone have any more specific directions?
 
#3 ·
PEA (main ingredient in SI-1) is known to be a great cleaner but it plateaus in effectiveness at a certain point of concentration where more PEA doesn't equate more cleaning. I don't exactly know where that is.

I've personally used a full bottle of SI-1 to a full tank of gas in the Corolla several times. However my favorite use of SI-1 is to simply add 1 oz (yes, 1 oz!) to a full tank of gas every fill-up. You can actually feel it idling slightly better with that low concentration. I'm not sure it's super effective at cleaning in those small amounts, but it speaks to the power of it that you can notice a 1 oz concentration in a full tank of gas.

I think ChrisFix will get to SI-1 in his youtube fuel cleaning series soon - will be interesting to see. Based on other PEA-based cleaners he's tested it seems like most of them don't really clean the combustion chamber that well. He unfortunately doesn't test the injector cleaning effectiveness of any of them.
 
#4 · (Edited)
I just called Redline and spoke to Dave and he said a 15 oz bottle treats 25 gallons so for a 12 gallon tank about half a bottle would give it a "good, strong initial clean" and that 1-1.5 oz per 10 gallons of fuel for maintenance would be optimum. Straight from the proverbial horse's mouth. Hopefully that helps anyone else out that might have the same question.