# Question on oil weight Lexus 350ES **URL:** \ **Category:** Factual Questions\ **Created:** [September 24, 2017, 3:32am UTC](https://boards.straightdope.com/t/question-on-oil-weight-lexus-350es/797143 "2017-09-24T03:32:34Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Saint\_Cad](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/saint_cad/32/18907_2.png) [@Saint\_Cad](https://boards.straightdope.com/u/Saint_Cad)\ **Post date:** [September 24, 2017, 3:32am UTC](https://boards.straightdope.com/t/question-on-oil-weight-lexus-350es/797143/1 "2017-09-24T03:32:34Z")
According to my research, I can use 0/20, 5/20, or 5/30. Is there a definitive site I can confirm this? If so, what would be the best for Northern Colorado? My commute is about 50 miles one way and I do have to get through stop and go traffic. Note: Only 51K miles on the car. I don’t know what oil is in there now (bought it used) but I will be using Mobil1 synthoil. ---
**Author:** ![Kedikat](https://avatars.discourse-cdn.com/v4/letter/k/ed655f/32.png) [@Kedikat](https://boards.straightdope.com/u/Kedikat)\ **Post date:** [September 24, 2017, 5:57am UTC](https://boards.straightdope.com/t/question-on-oil-weight-lexus-350es/797143/2 "2017-09-24T05:57:02Z")
In a Lexus document they recommend 0W-20. They repeat that about 20 times throughout. Specifying it as a part of every maintenance cycle. ---
**Author:** ![Gary\_T](https://avatars.discourse-cdn.com/v4/letter/g/3ec8ea/32.png) [@Gary\_T](https://boards.straightdope.com/u/Gary_T)\ **Post date:** [September 24, 2017, 10:21am UTC](https://boards.straightdope.com/t/question-on-oil-weight-lexus-350es/797143/3 "2017-09-24T10:21:19Z")
What model year? ---
**Author:** ![Saint\_Cad](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/saint_cad/32/18907_2.png) [@Saint\_Cad](https://boards.straightdope.com/u/Saint_Cad)\ **Post date:** [September 24, 2017, 3:58pm UTC](https://boards.straightdope.com/t/question-on-oil-weight-lexus-350es/797143/4 "2017-09-24T15:58:00Z")
2008 ---
**Author:** ![Gary\_T](https://avatars.discourse-cdn.com/v4/letter/g/3ec8ea/32.png) [@Gary\_T](https://boards.straightdope.com/u/Gary_T)\ **Post date:** [September 24, 2017, 6:08pm UTC](https://boards.straightdope.com/t/question-on-oil-weight-lexus-350es/797143/5 "2017-09-24T18:08:33Z")
My repair info only lists 5W-30. The info is taken directly from the vehicle manufacturer and is kept updated. Occasionally I have seen glitches, but in the absence of personally seeing an authoritative source to the contrary, I would go with this. That said, with modern oil, especially Mobil 1, I doubt there’d be any problem with the other viscosities you mentioned.