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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> Adding oil to fuel
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Adding oil to fuel - 7/21/2008 4:29:53 AM   
skyraider71


 

Posts: 252
Joined: 5/6/2008
From: mount washington, KY, USA
Status: offline 		Since I started in the hobby(nine years ago), I've heard of folks adding
extra oil to their fuel. I have never done this, I have always run Wildcat
15%nitro-18%oil with good results, and never added anything to it.
What are everyones' thoughts on this.


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RE: Adding oil to fuel - 7/21/2008 4:36:04 AM   
DMcQuinn



Posts: 1556
Joined: 1/9/2002
From: Chesterfield, MO, USA
Status: offline 		I think most glow engines will run fine with 18% oil. No reason to add any.

(in reply to skyraider71)
       Post #: 2

RE: Adding oil to fuel - 7/21/2008 4:58:51 AM   
jeffie8696



Posts: 1137
Joined: 5/10/2007
From: coralville, IA, USA
Status: offline 		A lot depends on how the fuel was made. If a manufacturer uses weight instead of volume to calculate the percentages you will be light on both nitro and oil from what I have been told. Methanol weighs the least and it is the cheapest of the 3 ingredients so it would end up being the highest percentage. I have had no bad experiences adding oil only ones from not enough oil. 1/2A engines are very sensitive to this.

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Castor, its like Vitamin C for glow engines. I am not Dom from Airwolf but I do resemble him.......Unfortunately

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RE: Adding oil to fuel - 7/21/2008 4:59:48 AM   
MetallicaJunkie



Posts: 1044
Joined: 9/17/2006
From: donna, TX, USA
Status: online 		that subject came out at the field today... one guy says he add 1 oz of castor commonly sold at supermarkets, to a gallon of fully synthetic to make it a blend

< Message edited by MetallicaJunkie -- 7/21/2008 9:31:18 PM >

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RE: Adding oil to fuel - 7/21/2008 5:09:44 AM   
rainedave



Posts: 5175
Joined: 7/21/2005
From: Greensboro, NC, USA
Status: online 		When I was using Powermaster Sport with 18% castor/synth I added 4ozs of castor to a new gallon. Now, I'm using Powermaster GMA with 22% castor/synth and I don't add any extra castor. I should add that I run a lot of old engines, too, and that's why I want the extra oil.

David

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       Post #: 5

RE: Adding oil to fuel - 7/21/2008 5:31:01 AM   
jeffie8696



Posts: 1137
Joined: 5/10/2007
From: coralville, IA, USA
Status: offline 		Dinasaurs must think Castor is yummy.

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Castor, its like Vitamin C for glow engines. I am not Dom from Airwolf but I do resemble him.......Unfortunately

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RE: Adding oil to fuel - 7/21/2008 5:35:46 AM   
XJet


 

Posts: 3452
Joined: 3/31/2003
From: Tokoroa, NEW ZEALAND
Status: offline
quote:

ORIGINAL: DMcQuinn

I think most glow engines will run fine with 18% oil. No reason to add any.

There are guys around here now running their engines (including helis and ducted fans) with no problems at all on 8% oil.

If you use the right type of oil that's all you need.


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RE: Adding oil to fuel - 7/21/2008 6:09:58 AM   
rainedave



Posts: 5175
Joined: 7/21/2005
From: Greensboro, NC, USA
Status: online
quote:

ORIGINAL: jeffie8696

Dinasaurs must think Castor is yummy.


Actually, they like fossil fuel.

David ***ducking for cover***

< Message edited by rainedave -- 7/21/2008 6:11:47 AM >

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       Post #: 8

RE: Adding oil to fuel - 7/21/2008 6:23:58 AM   
jeffie8696



Posts: 1137
Joined: 5/10/2007
From: coralville, IA, USA
Status: offline 		You must have heard of my using E85 mixed 50/50 to save money on glow fuel . 15% gasoline, actually it would only be about 5% after blending. Depends on how much castor I want to blend in for my hungry little dinasaurs.

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Castor, its like Vitamin C for glow engines. I am not Dom from Airwolf but I do resemble him.......Unfortunately

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RE: Adding oil to fuel - 7/21/2008 2:42:37 PM   
LeeHop



Posts: 211
Joined: 4/5/2005
From: Aurora, OR, USA
Status: offline
quote:

ORIGINAL: XJet
There are guys around here now running their engines (including helis and ducted fans) with no problems at all on 8% oil. If you use the right type of oil that's all you need.


XJet - what kind of oil do you use in an 8% mix?

(in reply to XJet)
       Post #: 10

RE: Adding oil to fuel - 7/21/2008 4:36:21 PM   
Capt Lou


 

Posts: 298
Joined: 1/3/2007
From: Manahawkin, NJ, USA
Status: offline 		You'll get as many different answers as there are replies to your question. If you find your engines are running well on what you're using, stick with it. Remember the old saying, "if it works, don't fix it"

(in reply to skyraider71)
       Post #: 11

RE: Adding oil to fuel - 7/21/2008 5:12:41 PM   
carrellh



Posts: 3529
Joined: 3/30/2003
From: Garland, TX, USA
Status: online
quote:

ORIGINAL: skyraider71
I have always run Wildcat 15%nitro-18%oil with good results, and never added anything to it.


The majority of my engines' manuals state that fuel with at least 18% oil is required. Unless your engines require more than 18% I do not see any reason to add any.




quote:

ORIGINAL: jeffie8696
A lot depends on how the fuel was made. If a manufacturer uses weight instead of volume to calculate the percentages you will be light on both nitro and oil from what I have been told.


As far as mixing by weight causing the oil or nitro to be low, it depends on how it is done. If you determine how much a specific volume of each ingredient weighs, you can use those weights to make fuel that does not short any of the ingredients.

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RE: Adding oil to fuel - 7/21/2008 6:09:43 PM   
jeffie8696



Posts: 1137
Joined: 5/10/2007
From: coralville, IA, USA
Status: offline 		If. However If they only use 18% by weight of the total you will get shorted.

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Castor, its like Vitamin C for glow engines. I am not Dom from Airwolf but I do resemble him.......Unfortunately

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       Post #: 13

RE: Adding oil to fuel - 7/21/2008 6:24:42 PM   
carrellh



Posts: 3529
Joined: 3/30/2003
From: Garland, TX, USA
Status: online
quote:

ORIGINAL: jeffie8696
If. However If they only use 18% by weight of the total you will get shorted.


Byrons is the sole US fuel company that I am aware of that blends by weight. How, specificlly, do they determine these weights? I truly have no idea.

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Carrell

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       Post #: 14

RE: Adding oil to fuel - 7/21/2008 6:43:57 PM   
stg61abc


 

Posts: 168
Joined: 4/19/2005
From: Catuaba do Sul SP, BRAZIL
Status: offline 		Hi Rider, 18% oil its ok on most modern engines, like ABN/ABC and in some racing motors. But in steel/iron piston and cylinder and in other "Hotter" aplications (ducted fan, helicopters,and others...) most people prefer to add some more oil to ensure a longer engine life, and better overall setting, and also added by people that use plain bearing motors, that require a litle bit more oil. Also, if you check at some of the OS Max engines owners manual for example, you´ll notice that 18% is the minimum indicated by this brand in various of their 2 stroke engines... (They also warn to use this percentual by volume and not by weight as some brands prefer to use...)
cheers

(in reply to skyraider71)
       Post #: 15

RE: Adding oil to fuel - 7/21/2008 7:37:18 PM   
jeffie8696



Posts: 1137
Joined: 5/10/2007
From: coralville, IA, USA
Status: offline 		I think it's time we get the straight skinny from the manufacturers. Sure they can claim 18% oil but if it is calculated by total weight then it is going to be low. I only trust SIG since I have met them and know how they blend. All my engines love SIG fuel. I have switched to using all castor fuel just because I can. My engines get a LOT of maintenance anyway cause I am an engine oriented guy. I challenge anyone to tell me all castor fuel is hurting my engines!!

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Castor, its like Vitamin C for glow engines. I am not Dom from Airwolf but I do resemble him.......Unfortunately

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