Mixing fork oils brands

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8/29/2018 11:21 AM

I am doing new seals and oil on my 2015 yz250f forks and I have 2 bottles of different brand 5wt fork oil. I know I need a little over 1 liter to do the job. Can I mix my Maxima blue label 5wt with a little bit of Bel Ray 5wt. I will do my inners first with Maxima but won't have enough left to do the outers. That's where I would like to mix the brands for the outers.

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2015 YZ250F

8/29/2018 12:04 PM
Edited Date/Time: 8/29/2018 12:05 PM

I would say you're fine. Same weight, different brand. Meh,I'd do it myself, personally. Just my 2 cents.

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8/29/2018 12:22 PM

I dont see why not. Ive done it myself.

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8/29/2018 12:29 PM

Maybe just use one oil on the inners and then the other for the outers

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2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

80% of the time it works every time
IG @2HRacing
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8/29/2018 1:22 PM

One on one side and one on the other.

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Take it to the limit, one more time!

8/29/2018 1:38 PM

mx317 wrote:

One on one side and one on the other.

I would have mixed the two together and acted like it was all the same. laughing

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8/29/2018 5:57 PM

mx317 wrote:

One on one side and one on the other.

RyanLester761 wrote:

I would have mixed the two together and acted like it was all the same. laughing

If you mix two 5wt's together won't you get a 10wt?

Oh, nevermind... you can just run half the recommended oil volume and it will be 5wt again. blink

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8/29/2018 5:59 PM

*Kidding of course for those that broke their sarcasm detector

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8/29/2018 6:16 PM
Edited Date/Time: 8/29/2018 6:18 PM

Use one oil in one leg and the other oil in the other leg.
While mixing them should not be an issue, we don't know what additives are in each and there could be an adverse reaction in mixing them.
Secret tip...Add about 1 oz of Dot 3 brake fluid to each oil. It will help the oil seals to do a better job and last longer.

Paw Paw

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8/30/2018 4:55 AM

Paw Paw 271 wrote:

Use one oil in one leg and the other oil in the other leg.
While mixing them should not be an issue, we don't know what additives are in each and there could be an adverse reaction in mixing them.
Secret tip...Add about 1 oz of Dot 3 brake fluid to each oil. It will help the oil seals to do a better job and last longer.

Paw Paw

Nice tip. Good thinking.

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8/30/2018 7:47 AM

Do the inners with one, then mix both together and use the mix for the outers.

Don't use one for one side and one for the other. Jeez.

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8/30/2018 8:26 AM

KDXGarage wrote:

Do the inners with one, then mix both together and use the mix for the outers.

Don't use one for one side and one for the other. Jeez.

You do know the inner and outer mixes oils. It forces it in the bottom seals and burps it out the top of the cartridge, jeez. The smart thing would be to put one brand on one side and one on the other.

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Take it to the limit, one more time!

8/30/2018 9:27 AM

Paw Paw 271 wrote:

Use one oil in one leg and the other oil in the other leg.
While mixing them should not be an issue, we don't know what additives are in each and there could be an adverse reaction in mixing them.
Secret tip...Add about 1 oz of Dot 3 brake fluid to each oil. It will help the oil seals to do a better job and last longer.

Paw Paw

Why dot 3 vs dot 5? Just curious.

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Livin' the dream, two wheels at a time!

8/30/2018 9:47 AM

do not add brake fluid to fork oil. it will not "help" the seals.

not all oils are exactly the same viscosity even though they have the same viscosity number on them, but in this case, they will be close enough unless you are a pro level rider.

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8/30/2018 10:22 AM

barnett468 wrote:

do not add brake fluid to fork oil. it will not "help" the seals.

not all oils are exactly the same viscosity even though they have the same viscosity number on them, but in this case, they will be close enough unless you are a pro level rider.

I want to hear the reasons behind adding it. Personally, I'd worry about seal swell.

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Livin' the dream, two wheels at a time!

8/30/2018 11:03 AM

slipdog wrote:

If you mix two 5wt's together won't you get a 10wt?

Oh, nevermind... you can just run half the recommended oil volume and it will be 5wt again. blink

You're right! Simple addition. Lol.

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8/30/2018 11:40 AM

Seal swell is exactly what you want a small amount of in the fork oils. They did at one time come with an additive to do this, but that was dropped many years ago. I still swear by it and my seals last a lot longer using it. The Dot 3 has this additive in it as does Dot 4 and Dot 5, but cost a lot less.
I am a believer, but I do understand that others may not be and to that I say "to each his own". I use what works for me based on experience.

Paw Paw

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8/31/2018 8:57 AM

I always found this article about suspension fluid very informative.

http://www.peterverdone.com/wiki/index.php?title=Suspension_Fluid

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9/2/2018 3:14 PM

Seal swell = stiction, a modern day no-no.

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9/3/2018 6:55 AM

KDXGarage wrote:

Seal swell = stiction, a modern day no-no.

Good thought, but not accurate. The chemicals in brake fluid help make the seals a bit softer and thus conform to the sealing areas better , but add no stiction.

Paw Paw

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9/3/2018 7:55 AM

m21racing wrote:

Why dot 3 vs dot 5? Just curious.

DOT 5 is silicone based...vastly different properties than either DOT 3 or 4. It also doesn't play nice with other fluids

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