9%oil

Old 04-25-2011, 07:30 PM
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Does 9% blend shorten engine life? I love using it, it's so crisp/clean and runs cooler with longer run times. I love it, but i am wondering if it shortens engine life. I don't yet have enough expierience running with it to know for sure. I have only run 2 gallons of it. It has a tight tuning window, but once it's there the tune seems to hold forever.

So, does it hurt/help engine in long term? Of course we are assuming engine is tuned correctly I am hearing conflicting reports.
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Old 04-25-2011, 07:46 PM
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What I found out is that oil content really doesn't matter. Pre-heating the engine to about 180 degrees before every start equals engine longevity.
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Old 04-25-2011, 07:48 PM
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Originally Posted by dreaux View Post
Does 9% blend shorten engine life? I love using it, it's so crisp/clean and runs cooler with longer run times. I love it, but i am wondering if it shortens engine life. I don't yet have enough expierience running with it to know for sure. I have only run 2 gallons of it. It has a tight tuning window, but once it's there the tune seems to hold forever.

So, does it hurt/help engine in long term? Of course we are assuming engine is tuned correctly I am hearing conflicting reports.
I don't recommend breaking an engine in with a 9% fuel,i have noticed it shortens engine life as opposed to breaking in with an 11% oil


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Old 04-25-2011, 07:49 PM
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I agree. But sometimes it is such a pain in the a$$ and dang near impossible to do on some occasions.
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Old 04-25-2011, 07:50 PM
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Originally Posted by houston View Post
I don't recommend breaking an engine in with a 9% fuel,i have noticed it shortens engine life as opposed to breaking in with an 11% oil


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Heck no i am not breaking in with 9% oil

I breakin with sport blend. I race with 9%
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Old 04-25-2011, 08:12 PM
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Originally Posted by dreaux View Post
Heck no i am not breaking in with 9% oil

I breakin with sport blend. I race with 9%
Your a good guy dreaux , you may ask a shit ton of odd questions but aty least you learn from the responses posted , kudos to ya bro!
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Old 04-25-2011, 08:18 PM
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Old 04-25-2011, 09:50 PM
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i dont think 9% oil whould shorten the life of the engine since most nitro fuels
have synetic oil in quality nitro fuels.

now 9% back in the day i woulnt say that inless your a good tuner.
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Old 04-25-2011, 10:00 PM
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i run fuel that has 7.5% oil, was running 8% and before then 9%... all my engines has lasted atleast 8 gallons. i have an engine with 11.5 gallons on it now with original pinch, only thing that has been replaced is the bearings (its being used in truggy now)... all im trying to say is, no, it will be fine. and it will run cooler
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Old 04-25-2011, 10:06 PM
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my ninja hangs right below 200 and rips like crazy. I was running eb mods fuel, but i am going to switch to byrons 9%.

how many minutes are you getting on a tank with 7.5?

going foward from here i need to be pretty tight with my $$$. I have 2 motors that need to last for a good while.

Thats why the question.
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Old 04-25-2011, 10:25 PM
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Originally Posted by dreaux View Post
my ninja hangs right below 200 and rips like crazy. I was running eb mods fuel, but i am going to switch to byrons 9%.

how many minutes are you getting on a tank with 7.5?

going foward from here i need to be pretty tight with my $$$. I have 2 motors that need to last for a good while.

Thats why the question.
just switched this weekend from 8%, engine was running really rich and was getting 9.5+ min (about the same as 8% oil but i see getting more once engine is tuned better), temps went from 250-260 down to 220ish and had more power even running rich. this is running a orange head Alpha (truggy engine) in a buggy. this is O'donnell Fuel by the way.

i ran byrons 30/9 for a long time before i switched to OD, engines went over 8 gallons easy, and most were Taiwanese engines. the biggest key to long engine life is not running lean and not running rich, mainly to keep temps down (running rich actually hurts the engine also). i hardly ever check temp, ran engines as cold as 180 and as hot as 290 and never had any issues with engines or life. i have to make my engines last a long time also, money is tight being a full time college student and trying to race almost every weekend.
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Old 04-25-2011, 10:38 PM
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I am a full time college student as well, so is my wife.

Do you always preheat your engines?
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Old 04-25-2011, 10:45 PM
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Originally Posted by dreaux View Post
I am a full time college student as well, so is my wife.

Do you always preheat your engines?
no sir, i do for about the first gallon or until you can turn it over by hand or when its really cold. i just dont crank it and start winging it. i let it warm up by little blips or i just let it idle from start up. i never crank it and through it right on the track and start trying to run it hard, i take a few laps kinda slow till the engine gets warm.
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Old 04-25-2011, 10:48 PM
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thanks for the insight max.
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Old 04-25-2011, 10:54 PM
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In my opinion and experience, 7% is enough as long as it is all castor.

For offroad, the 50/50 9% blend is fine (Byrons) though for onroad on BIG tracks I would add an ounce of castor to it.
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