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.
In a Lexus document they recommend 0W-20. They repeat that about 20 times throughout. Specifying it as a part of every maintenance cycle.
What model year?
2008
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.