Is it a good idea to move from Synthetic oil to normal oil ?

[bronsin]

Originally Posted by IllusionX

So what did they recommend to you?

You know some part of Canada regularly get 100+°F in the summer? I would say unless you live in the middle East, where temps stay 100+ at night, you don't need heavy weight oil.

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Ive noticed people posting from places like the Middle East that they use 20W-50. Why I don't know. MAybe Toyota does?

Phoenix gets to 120 in the summer. Stop and go driving with the AC on under those conditions would be about the most extreme operating conditions I could imagine. I definitely would want some input from people with professional experience about what oil to use.

I have serious doubts 5W-30 is going to cut it.