Aye, Phillip touched on a point in the "camry Oil change mess" thread that I would like to chase down.
Is it advised to go to thicker oil as a car ages.
I have an '87 Corolla. It uses about a quart of oil every three months. Several little "seeps" here and there that my mechanic says are not worth spending money on.
I have religiously changed the oil and filter every 3,000 miles following the break-in period with the recommended 10W-40 oil. Good oil and good filters.
Now, with 230K on the car and a "noisy" engine, would I be advised to shift to another oil. I'm in the Pacific Northwest where we will have an occassional 28-degree low, but for the most part the winter driving temps are mid 30s to mid 50s and in the summer it ranges from lows of
55 to the rare 102.Mostly local, low speed, country driving.