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Old 05-02-2010, 04:41 PM   #1
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Default Motor oil as shock oil

I bought some 30wtmotor oil at the store for 3 bucks for a quart, I used it as my shock oil and it works great plus it's alot cheaper!
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Old 05-02-2010, 04:43 PM   #2
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it may eat your silicon o rings in the shocks as well as the plastic parts.....so you will need that whole quart to refill them every run....because leak they will...
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Old 05-02-2010, 04:49 PM   #3
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it may eat your silicon o rings in the shocks as well as the plastic parts.....so you will need that whole quart to refill them every run....because leak they will...
Why would it eat the plastic & o-rings?
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Old 05-02-2010, 04:50 PM   #4
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if its 10w30 its 10wt oil with the shear strength of 30wt. any oil that has a 10w before any other number is 10wt oil. 20w50 would be 20wt oil. etc. food for thought. and yet the petrolium based oil will eat the seals.
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Old 05-02-2010, 05:00 PM   #5
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Motor oil will work fine. It will eat some seals.

Silicone was chosen to replace motor oil in the mid-late 80's for it's anti foaming and low heat changing properties.
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Old 05-02-2010, 05:02 PM   #6
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motor oil has solvents in it to break down tars, waxes and other build up. In my experience most seals on a motor are cork, rubber, metal that come in to contact with petroleum based oil. Some seals/o rings may be a silicone base that has been formulated to resist breakdown from motor oil and gas/diesel...
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Old 05-02-2010, 05:23 PM   #7
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Motor oil shouldn't attack the silicone o rings any worse than silicone shock oil does. If you go to a industry website and look up o ring materials and fluid compatability charts, the worst thing you can expose silicone o rings to is.......sillicone oil. That's why they swell in our shocks and should be changed out every week or two.
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Old 05-02-2010, 05:27 PM   #8
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So what's worse, motor oil or silicone?
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Old 05-02-2010, 05:32 PM   #9
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All oils thin out as the temp goes up. Silicone is the choice for serious racing because it changes less (though it still changes quite a bit). Silicone will give more consistent performance.
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Old 05-02-2010, 05:40 PM   #10
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forest.. for the $ you are saving go for it and just rebuild the shocks more often. it really boils down to weather the extra time is worth the savings.

but note even buying strait 30wt don't meant it will be the same thickness as associated 30wt or losi 30wt seeing that "wt" is a very generic and loose term.
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Old 05-02-2010, 05:47 PM   #11
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forest.. for the $ you are saving go for it and just rebuild the shocks more often. it really boils down to weather the extra time is worth the savings.

but note even buying strait 30wt don't meant it will be the same thickness as associated 30wt or losi 30wt seeing that "wt" is a very generic and loose term.
but the motor oil will be more consistent since it is for cars that cost lost of $$$$. it needs to be more accurate than rc oil. the only problem with motor oil is that it is darker. will look dirty if you dont know what to look for. i would only go with synthetic since the real oil would be inconsistent.
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Old 05-02-2010, 05:47 PM   #12
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Yea I brought it for a ride I didn't see no difference, I'm not a big racer, it's my only rc and I just bash and race on my backyard track, so for me it's good
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Old 05-02-2010, 05:49 PM   #13
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but the motor oil will be more consistent since it is for cars that cost lost of $$$$. it needs to be more accurate than rc oil. the only problem with motor oil is that it is darker. will look dirty if you dont know what to look for. i would only go with synthetic since the real oil would be inconsistent.
I got a quart I'll change the oil more often
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Old 05-02-2010, 05:56 PM   #14
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I got a quart I'll change the oil more often
true. you would have all this oil. now you got to buy the seals.
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Old 05-02-2010, 06:00 PM   #15
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true. you would have all this oil. now you got to buy the seals.
I'll buy a couple next trip to the hobby shop, it can't be much worse then silicone
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