Do you recommend using a thicker oil on a 05 scion xb with 31,000 miles when getting an oil change?

Answer 1

I would not increase the weight of the oil unless the engine uses more than a quart of oil in 3000 miles and/or the oil pressure is below normal. 30,000 miles is a very young engine unless it has been abused. Always change the oil every 3000 miles with petroleum oil or about every 6000 miles with a good synthetic oil. High quality synthetic oil cost more, but it goes further.

Answer 2

Toyota makes great engines, At about 50,000 I would start to up a high end synthetic oil. That well help the engine when it start getting older.

But your only at 31K, I would not worry about putting and thing new in. Just do what your manual says and you'll be fine.

Answer 3

Absolutely not. There's no reason for it, and besides, you have variable valve timing, which could be affected adversely with thicker oil in a cold climate (it is operated hydraulically by oil---so thicker oil, less flow, no valve timing).

Answer 4

No. 31k is low mileage for that vehicle. Follow the owner's manual suggestions.