# Oil Viscosity will it harm engine?

**URL:** <https://community.cartalk.com/t/oil-viscosity-will-it-harm-engine/1092>\
**Category:** Maintenance/Repairs\
**Created:** [June 29, 2007, 6:14pm UTC](https://community.cartalk.com/t/oil-viscosity-will-it-harm-engine/1092 "2007-06-29T18:14:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![vboca1](https://avatars.discourse-cdn.com/v4/letter/v/c77e96/32.png) [@vboca1](https://community.cartalk.com/u/vboca1)\
**Post date:** [June 29, 2007, 6:14pm UTC](https://community.cartalk.com/t/oil-viscosity-will-it-harm-engine/1092/1 "2007-06-29T18:14:27Z")

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I put 5-20 mobil one synthetic in my murano, will it do any harm. manual calls for 10-30

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**Author:** ![Joseph\_E\_Meehan](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/joseph_e_meehan/32/21_2.png) [@Joseph\_E\_Meehan](https://community.cartalk.com/u/Joseph_E_Meehan)\
**Post date:** [June 29, 2007, 7:02pm UTC](https://community.cartalk.com/t/oil-viscosity-will-it-harm-engine/1092/2 "2007-06-29T19:02:32Z")

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**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\
**Post date:** [June 29, 2007, 7:23pm UTC](https://community.cartalk.com/t/oil-viscosity-will-it-harm-engine/1092/3 "2007-06-29T19:23:20Z")

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#20 oil is a little thin for summertime driving. You can “convert” it to 10-30 by adding a container of STP thereby salvaging the oil change…