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Old 02-22-2011, 07:25 PM   #1
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Default Can diff oil be mixed to get a different consistency?

Or would the diff be inconsistent ( zing!). I'd be mixing 30K and 10K in different proportions, like 7 parts 10, 3 parts 30.
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Old 02-22-2011, 07:30 PM   #2
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yes they can. i do it often, but i always do a 50/50 mix to be more accurate.
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Old 02-22-2011, 07:48 PM   #3
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Yes i do it all the time to get mid weights like 1500.
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Old 02-22-2011, 07:57 PM   #4
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Awesome, thanks guys.
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Old 02-22-2011, 07:59 PM   #5
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I'm not 100% sure on this but remember seeing a website a good while back that you would enter the two viscosity oils you wanted to mix and it would tell you the resulting thickness of the oil. According to this website, a 50/50 mix was not correct. For example 50% 30wt and 50% 40wt does not get you 35wt oil. Also with oils it needs to be mixed VERY well (for shock oil thicknesses), for diff oils it might not be possible for the r/c racer with average tools to mix the oil properly. This would result in thick and thin patches of oil in the bottle. Fluid dynamics is a subject I think no one or very few people in the r/c industry have schooling for and is more of trial and error testing various changes out to determine what works best for their criteria with minimal or acceptable compromise for the application.

I think If you're wanting to save a few bucks on a bottle of oil, it's better to buy the bottle of oil you want. If no oil in the thickness of oil you want is available in the brand you use, possibly look at other brand oils in the thickness you want. Some offer thicknesses other brands don't, but their thickness relative to other brand oils can vary and be a factor. If you want to use 6k oil and no one offers this and you mix 50% 5k and 50% 7k, it might not be 6k oil but will be close enough to get what you are looking for out of the oil if you are able to mix it properly.
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Old 02-22-2011, 08:04 PM   #6
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That website was done by GE, which unfortunately no longer exists as they were bought out. I can't remember the name of the new company, but I can find out tomorrow at work as my Co uses some of their products. I am pretty sure the new Co did "re-write" that webpage too, so if I can find it, I'll post it up.
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Old 02-22-2011, 08:06 PM   #7
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Oh I won't be mixing the oils to make a new bottle. It's also not a matter of money, just convenience, since I'd have to order the proper oil and wait a week. The races won't wait for me, hehe.

I'd be pouring it in the diff itself, no real science behind it as I just want something that's closer to 10K than 30K, but more than 10K.

P.S. This is for my 1/16 rally car's center diff. Reason I posted this in Nitro Offroad is because this is where most oil diff tuning knowledge resides.
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Old 02-22-2011, 08:13 PM   #8
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A quick Google yielded this...
http://www.scriptasylum.com/rc_speed/oil_mixer.html
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Old 02-22-2011, 08:32 PM   #9
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Quote:
Originally Posted by NitroOB4You View Post
That site is bonkers awesome.
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Old 02-22-2011, 08:44 PM   #10
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Quote:
Originally Posted by NitroOB4You View Post
According to this site if you mix 30wt. and 40wt. and want 35wt. than you need 46% 30wt. and 54% 40wt. which completely makes sense if you understand your fluid dynamics/chemistry.
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Old 02-23-2011, 02:16 PM   #11
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just mix if 50/50 and dont worry about 1wt off
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Old 02-23-2011, 04:02 PM   #12
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Momentive is the new Co (formerly G.E) name, for anyone interested.
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