# is it okay if you mix engine oil viscosity?

**URL:** <https://forums.speedlife.net/t/is-it-okay-if-you-mix-engine-oil-viscosity/82863>\
**Category:** SON240sx Automotive\
**Created:** [January 7, 2005, 8:55am UTC](https://forums.speedlife.net/t/is-it-okay-if-you-mix-engine-oil-viscosity/82863 "2005-01-07T08:55:00Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Rps13-240sX](https://avatars.discourse-cdn.com/v4/letter/r/bc79bd/32.png) [@Rps13-240sX](https://forums.speedlife.net/u/Rps13-240sX)\
**Post date:** [January 7, 2005, 8:55am UTC](https://forums.speedlife.net/t/is-it-okay-if-you-mix-engine-oil-viscosity/82863/1 "2005-01-07T08:55:00Z")

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hmmm I was wandering if there any problem if you mix oils? in different viscosity? just wandering not like i am going to do it…

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**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\
**Post date:** [January 7, 2005, 9:25am UTC](https://forums.speedlife.net/t/is-it-okay-if-you-mix-engine-oil-viscosity/82863/2 "2005-01-07T09:25:29Z")

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hah take a guess…  
maybe its…locked

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**Author:** ![GT1](https://avatars.discourse-cdn.com/v4/letter/g/b5e925/32.png) [@GT1](https://forums.speedlife.net/u/GT1)\
**Post date:** [January 7, 2005, 9:35am UTC](https://forums.speedlife.net/t/is-it-okay-if-you-mix-engine-oil-viscosity/82863/3 "2005-01-07T09:35:11Z")

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i wouldnt sugest it.

and really… we have a serach button for a reason.

[http://forums.son240sx.ca/search.php](http://forums.son240sx.ca/search.php)

[www.freshalloy.com](http://www.freshalloy.com)

GT

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**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\
**Post date:** [January 7, 2005, 5:35pm UTC](https://forums.speedlife.net/t/is-it-okay-if-you-mix-engine-oil-viscosity/82863/4 "2005-01-07T17:35:31Z")

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> [@Rps13-240sX](#):
>
> hmmm I was wandering if there any problem if you mix oils? in different viscosity? just wandering not like i am going to do it…

It’s not something I would Sugguest in a motor you plan to drive  
hard with. But if it’s just a daily driver that you hit the throttle once  
and a wile then I don’t have a problem with mixing Oils. I’ve done it  
many times. Just one thing though keep the grade of oil the same,  
for instance keep dyno juice with dyno juice and Synthetic with Synthetic.  
Mixing the Viscosity just make sure you don’t go too thin or too thick.