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  #1  
Old 06-04-2019, 06:25 PM
MVPILOT MVPILOT is offline
 
Join Date: Aug 2014
Location: Mount Vernon, WA
Posts: 55
Default 100LL with or without Decalin

I have an RV-12 (Rotax 912 ULS) and most of the last three years I've been running high octane ethanol and lead free fuel purchased at the KAWO Flight Services. They will no longer be ordering it due to poor sales volume. I don't want to transport my own fuel so it looks like I'll be using 100LL which is approved for use in the 912ULS. However I was told today that many Rotax owners ad Decalin fuel additive to there 100LL. After reading the label I'm not sure it is a good idea because the label.

However this is written on the Aircraft Spruce Decalin label and it sounds like it might cause as many problems as it cures. "Make sure you remove and clean your oxygen sensor every 20 hours to remove these lead phosphate deposits when using Decalin RunUp." I'm not sure about using Decalin or not. Pros and cons?
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  #2  
Old 06-04-2019, 07:02 PM
moosepileit moosepileit is offline
 
Join Date: Dec 2010
Location: Floyds Knobs, IN
Posts: 492
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I assume you lost Arlington flight service and they likely got it from Nelson Petroleum.

Pure-Gas.org-
Arlington 92 Arlington Flight Services
360-435-5700 18810 59th Dr Ne
87 92 Nelson Petroleum 360-435-2208 208 S West Ave
Arlington
92Oso General Store 360-435-4445 30230 Oso Loop Rd
87 River Rock Smoke Shop 360-652-4800 21125 Smokey Point Blvd

TCP/Decalin at combustion helps turn stickier lead salts to slippery lead phosphates. You still get lead in your oil, still use a lead suspending oil and shorter changes. If you clean the dry sump tank you find lead sludge.

There should be no O2 sensor in most any bing 64 carb'd 912s.
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  #3  
Old 06-04-2019, 07:11 PM
rongawer rongawer is offline
 
Join Date: Dec 2007
Location: Brentwood, CA
Posts: 504
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I use it whenever I run 100LL and it keeps my plugs clean. Run in the correct proportion (1-2oz per 10 gallons), it will reduce the amount of lead in your oil, as well as the rest of the engine, but it’s main purpose is to eliminate clinkers in the combustion chamber and on your plugs.

A good indication of correct volume is a little white residue in the tail pipe.

The only negative is the cost and having an extra step when fueling; both of which I consider minimal. I’m pretty happy with it.
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- RV10, Build in progress.
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- Several others that are now just great memories for me.
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  #4  
Old 06-04-2019, 08:59 PM
MVPILOT MVPILOT is offline
 
Join Date: Aug 2014
Location: Mount Vernon, WA
Posts: 55
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Quote:
Originally Posted by moosepileit View Post
I assume you lost Arlington flight service and they likely got it from Nelson Petroleum.

Pure-Gas.org-
Arlington 92 Arlington Flight Services
360-435-5700 18810 59th Dr Ne
87 92 Nelson Petroleum 360-435-2208 208 S West Ave
Arlington
92Oso General Store 360-435-4445 30230 Oso Loop Rd
TCP/Decalin at combustion helps turn stickier lead salts to slippery lead phosphates. You still get lead in your oil, still use a lead suspending oil and shorter changes. If you clean the dry sump tank you find lead sludge.

There should be no O2 sensor in most any bing 64 carb'd 912s.
Thank you. Yes I was getting it from Arlington Flight Services.
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  #5  
Old 06-04-2019, 08:59 PM
MVPILOT MVPILOT is offline
 
Join Date: Aug 2014
Location: Mount Vernon, WA
Posts: 55
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Quote:
Originally Posted by rongawer View Post
I use it whenever I run 100LL and it keeps my plugs clean. Run in the correct proportion (1-2oz per 10 gallons), it will reduce the amount of lead in your oil, as well as the rest of the engine, but itís main purpose is to eliminate clinkers in the combustion chamber and on your plugs.
A good indication of correct volume is a little white residue in the tail pipe.
The only negative is the cost and having an extra step when fueling; both of which I consider minimal. Iím pretty happy with it.
THANK you.
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  #6  
Old 06-05-2019, 05:20 AM
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tomkk tomkk is offline
 
Join Date: Apr 2014
Location: Port Orange, Fl
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Quote:
Originally Posted by rongawer View Post
... Run in the correct proportion (1-2oz per 10 gallons) ...
That's 1/2 oz per gallon, right?
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Port Orange, Fl
RV-12 N121TK ELSA #120845; first flight 06/10/2015; 650 hrs as of 09/2019
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  #7  
Old 06-05-2019, 07:40 AM
DGlaeser DGlaeser is offline
 
Join Date: May 2005
Location: Rochester Hills, MI
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Quote:
Originally Posted by tomkk View Post
That's 1/2 oz per gallon, right?
Nope. 1/2 oz per 10 gal.
Iíve been using it in my Subaru when i use 100LL, works great.
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  #8  
Old 06-05-2019, 11:09 AM
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tomkk tomkk is offline
 
Join Date: Apr 2014
Location: Port Orange, Fl
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Quote:
Originally Posted by DGlaeser View Post
Nope. 1/2 oz per 10 gal.
Iíve been using it in my Subaru when i use 100LL, works great.
Oh, sorry, I meant 1/2 oz per 10 gal. I was actually trying to correct the orig. post that indicated 1-2 oz per 10 gal.
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Port Orange, Fl
RV-12 N121TK ELSA #120845; first flight 06/10/2015; 650 hrs as of 09/2019
RV-12 N918EN ELSA #120995 Eagles Nest Project; first flight 05/18/2019
SPA Panther N26TK in progress
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  #9  
Old 06-05-2019, 09:36 PM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,501
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My plastic jug has a mark for gallons of gas treated that takes the guesswork out. I bought it in 2012 when I got my AWC, and still have half the bottle left ó- shows how diligently I avoid 100 LL.😁
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  #10  
Old 06-05-2019, 09:45 PM
rongawer rongawer is offline
 
Join Date: Dec 2007
Location: Brentwood, CA
Posts: 504
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Quote:
Originally Posted by tomkk View Post
Oh, sorry, I meant 1/2 oz per 10 gal. I was actually trying to correct the orig. post that indicated 1-2 oz per 10 gal.
From the label on the Decalin bottle:
“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.”

I find that 1 oz per 10 gallons works best for me...YMMV.
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- Several others that are now just great memories for me.
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