Decalin Runup Fuel Additive

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Overview

Decalin RunUp is approved for use with the new 100VLL (Very Low Lead) fuel announced by the FAA on Special Airworthiness Bulletin NE-11-55. Decalin RunUp contains two types of additive, one to reduce the negative effects of tetraethyl lead in aviation fuel and the other to improve the combustion efficiency, reduce combustion deposits and clean the fuel delivery system in aircraft. Users can expect the same level of engine cleanliness when using this fuel and Decalin RunUp as they saw with 100LL.

Make sure you remove and clean your oxygen sensor every 20 hours to remove these lead phosphate deposits when using Decalin RunUp.
The dosage of 1/2 ounce per ten gallons of fuel is a minimum. This can be increased to a maximum of 2 ounces per gallon for problem engines.

Decalin RunUp is not approved for use in the engines of certified aircraft but it has the same active ingredient, Tri Cresyl Phosphate as our previous product. Lycoming clone users have reported very good results when using this product.
RunUp MSDS

Notes:
Some white deposits may be seen on the plugs and in the exhaust pipe during use; this is normal with RunUp since the lead in the fuel is being converted to non conductive lead phosphate. When no additive is used, lead oxide is formed. It is lead oxide which causes plugs to misfire due to its partial conductivity shorting out the plug. In addition, lead oxide tends to form in large clumps or clinkers whereas the lead phosphate is crumbly and if anyy is left behind in the combustion chamber it deposits in even layers.

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S. B 02.09.2019	Seems to prevent, in a certain extent, the carbon deposit in the combustion chambers. At least the deposit is less dense, more friable/brittle. Might clean up on its own.
Antonino 25.08.2019	Too soon to tell its effectiveness. My forum members on the 150/152 club swear by it. They are an astute group of owners whose opinions I value.
Ronald G 11.07.2019	I use 1 oz per ten gallons on my UL350 engine. It works very well when running 100LL.
Carsten H 18.06.2018	I had to double the ratio in order to keep the plugs from fouling. Also noticed that the fluid changed color from yellowish to clear. Great product.
James P 01.03.2018	I cant comment on the function of the product because I havent used it long enough to evaluate. However, I do have comment on the package design. The package is designed to pour a small measured amount out. When the container is new and full, I couldnt dispense the 1/2 OZ or 1 OZ quantity. The design allowed more fluid from the main tank to come out. I found that at least until you dispense a few ounces, a suction bulb or syringe is easier to use.
John D 18.01.2018	Must use this with 100LL or my old Franklin breaks rocker arms and sticks valves.
William R 29.10.2017	been using this product for 2 years now in Lycoming IO360 with excellent results. Its difficult to assess engine efficiency without laboratory testing. However, the reduction/elimination of lead deposits on valves and especially spark plugs is is very obvious. At annual the plugs show almost no lead build up. Before using Decalin the lead build up was significant over a year. I heard about this from engineering friends at General Atomics who used it on their drones with great success.
Charles R 03.10.2019	Easy measure bottle and good lead fouling reduction in lower compression engines.
Alexander L 12.11.2018	As a second owner of fairly new aircraft that has Lycoming tio 540, I have been having problem with lead fouling and hard starting. I came across this product and tried it for a year. I never had experience hard start, no lead fouling spark plug, and engine run smooth as theyÃ¢??re supposed to be. I increase the ratio to 2oz per 10 gal. I will borescope all cylinders and see the effect of Decalin Runup. To make easy dispensing, used a large syringe 2oz.
John F 13.02.2020	Great product...good value!
Loren 27.02.2020	Must have for xctry flights in the SuperStol when 100LL is the only option for the Rotax. Excellent product and performance at a great price from Aircraft Spruce....as usual.
Michael R 09.11.2020	ordering and shipping was excellent, this product seems to be exactly what I was looking for..