break-in fuel
 

I have just got my new Saito 100. I run wildcat 15% nitro 18% oil content on all my 2 strokes. Will this fuel run the saito. Hence will it be ok to break-in the engine.
thanks,
rookie 4 stroker

break-in fuel
 

Chad,

I would recommend less nitro, say 10%, and more castor. Add 4 ounces of castor to a gallon of 10% and you'll have close to 20% castor. Your 4 stroke will thank you.

ED

break-in fuel
 

Chad,

My experience/opinion differs from Ed's. Per Saito's engine manual/instructions, what you are running now is correct for your Saito 100.

I run Cool Power 15% 2 stroke fuel in my Saito 100, and in my 13 other Saito engines, ranging in size from .56 to 270, including 5 twins. I've never had a lubrication related failure.

Horizon recommends Cool Power 30% Heli fuel. I don't need that - power and idle is great on 15%. Also, if you want to keep your engine clean, use a fuel with straight synthetic oil, not a blend with castor oil. Your 4 stroke's exhaust is hotter than that from a 2 stroke, and the castor will coat your muffler in no time.

I lost my fuel chart url.!!!
 

I have 4 Saitos. I have researched and ask soooo many questions about this oil content thing... but finally came to a decision. First of all....(even if it IS overkill), Saito requires 20% oil content in the fuel. Then it gets sketchy. All I know is that CASTOR will not only gum up the muffler but the internal parts as well.... especially at the valves. I had been running Wildcat Premium Extra 15-18%. The 18% oil is: 20% castor/80% synthetic. I then added 2.5 oz. of synthetic oil to bring it to 20% total oil.
Since talking to many 4 stroke guys.... I have now switched to Wildcat 15% nitro and 18% ALL synthetic oil. BUT....now I add 2.5 oz. of CASTOR to the gallon to again bring the total oil to 20%. There are soooooo many thoughts on this subject, and sooooo many think their mix is correct. I am satisfied with my decision but that doesn't mean it is the only answer. I feel the 20% oil is overkill by Saito. BUT.... I will continue to run 20%.... It makes a coooool smoke trail:D .....lownslo

PS. I assume that the warrany would also be void with less than 20% oil....if it can be proved???

break-in fuel
 

I use 15% Omega fuel in mine. It is an 18% oil content with both castor and synthetic. I like the idea of running some castor to coat the internal working parts. I have had no problems, and it was recommended by several others in my club. For break-in use the nitro content you plan to fly with. If you want to add oil to bring it up to 20% for break-in, fine.

More nitro runs hotter, causing more expansion of the parts, hence you can use a high nitro fuel and switch to a lower nitro as the engine gets worn, but not the oter way around. I believe this is more important in an ABC engine than in a ringed engine (such as your Saito).

It is also convenient to use the same fuel for all my plane engines as opposed to having several jugs and having to switch depending on what you're flying!! 30% nitro heli fuel is supposed to give outstanding power, but I'm just a sport flyer, and don't need it.

break-in fuel
 

Please keep in mind, I'm recommending the lower nitro at 20% castor ONLY for the break-in period. The lower Nitro will produce less heat at an identical needle setting, yet hot enough to produce desired wear for break-in. You will not be running so much fuel to break-in the engine that a 5% jump in nitro would be ineffective. My main thoughts when breaking in any engine is to make sure it's well lubricated, has just enough nitro to run well, and don't over-prop it.
I know that others have their own thoughts on this, but I have found this to be effective for many, many engines.

ED

break-in fuel
 

Hi!
I can't understand why this subject is comming up with regular intervalls??!
The oil percentage and type of oil and whether it's 15% or 20% is not that critical ........!
As long as you know what you do it does not matter if you run 15% syntetic oil or 25% castor oil when running in your engine ...both could be bad , or good ! Its how you set the fuelneedle that's counts!

Regards!
JanK
Sweden

Lube
 

I have two of the early high compression Saitos, .80 and a 1.50 which I originally ran on Fox Missle Mist 15% nitro and 20% castor for about a year, then when I heard that all castor was "bad" I changed to Byron's four cycle fuel 15% nitro and 16% lube and now run them on WildCat Premium Extra 15% nitro and 18% lube of which about 2% is castor, these engines have thrived on all these fuels, but by far they run the smoothest and have the best transition on the WildCat. What I'm saying is that I agree with JAKA

break-in fuel
 

Pretty sure that Missle Mist is 25% nitro and 18% castor oil.

Right
 

SP, you're right, I called it by the wrong name. Right numbers wrong name. Sorry.