# Finding the Correct Oil **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** oil\ **Created:** [August 7, 2015, 3:15am UTC](https://community.cartalk.com/t/finding-the-correct-oil/90834 "2015-08-07T03:15:07Z")\ **Posts on this page:** 3\ **Page:** 2
**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:** [August 10, 2015, 2:43am UTC](https://community.cartalk.com/t/finding-the-correct-oil/90834/21 "2015-08-10T02:43:52Z")
I love it when manufacturers, discovering a design defect in their engines try to cover it up by specifying some trick, expensive and hard to find lubricating oil…Hoping they can keep that engine alive through the warranty period… Castrol by the way is owned by BP… ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [August 10, 2015, 7:55pm UTC](https://community.cartalk.com/t/finding-the-correct-oil/90834/22 "2015-08-10T19:55:53Z")
The debate over oil viscosity crosses a lot of borders > **[My experience using 5W-40 instead of 0W-20](https://priuschat.com/threads/my-experience-using-5w-40-instead-of-0w-20.141040/)** > > hi all, > > I use to get 48 mpg average on my 2010 Prius using 0w20 oil. I switched to Lexus 5W-40 fully synthetic oil as the local toyota dealer in... It’s amazing just how strong some opinions are. ---
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [August 10, 2015, 10:10pm UTC](https://community.cartalk.com/t/finding-the-correct-oil/90834/23 "2015-08-10T22:10:51Z")
I think it is a mistake to judge correct oil viscosity to use by comparing gas mileage. Jordan, as in the country? [Previous page](https://community.cartalk.com/t/finding-the-correct-oil/90834.md?page=1)