# Motor oil

**URL:** <https://community.cartalk.com/t/motor-oil/44122>\
**Category:** Maintenance/Repairs\
**Tags:** ford, f250\
**Created:** [February 8, 2010, 11:34pm UTC](https://community.cartalk.com/t/motor-oil/44122 "2010-02-08T23:34:13Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![xcskier](https://avatars.discourse-cdn.com/v4/letter/x/5e9695/32.png) [@xcskier](https://community.cartalk.com/u/xcskier)\
**Post date:** [February 8, 2010, 11:34pm UTC](https://community.cartalk.com/t/motor-oil/44122/1 "2010-02-08T23:34:13Z")

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I have 4 qts of Chevron Supreme and 3 qts of Exxon Superflo, both 10w-30, both API Service SM.  
  
 Is it OK to use these two oils together in my Ford V-10 engine?

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**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\
**Post date:** [February 8, 2010, 11:35pm UTC](https://community.cartalk.com/t/motor-oil/44122/2 "2010-02-08T23:35:58Z")

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Yes, if that’s the grade called for by Ford.

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/48514_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [February 8, 2010, 11:39pm UTC](https://community.cartalk.com/t/motor-oil/44122/3 "2010-02-08T23:39:10Z")

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Yup–as long as the engine calls for 10w-30 oil, then you can feel free to mix them.

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**Author:** ![Triedaq](https://avatars.discourse-cdn.com/v4/letter/t/65b543/32.png) [@Triedaq](https://community.cartalk.com/u/Triedaq)\
**Post date:** [February 9, 2010, 2:14am UTC](https://community.cartalk.com/t/motor-oil/44122/4 "2010-02-09T02:14:22Z")

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It seems to me that there is a government standard that oils of the same viscosity and API service rating have to be compatible. In fact, even oils of different visosity and/or API service ratings are probably compatible. When I have rented U-Haul trucks, I’ve been told that if I check the oil and its low to put in a quart and I would be reimbursed. I was never told what kind of oil to put.

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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:** [February 9, 2010, 2:35am UTC](https://community.cartalk.com/t/motor-oil/44122/5 "2010-02-09T02:35:38Z")

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Standard Oil is Standard Oil…