All right oil gurus......
My oil (Penzoil Dino Oil) has been in my engine for over a year now. It has 1,422 miles on the oil. Oil is still fairly clear, not brand new but not as black as 3000 miles either. Since the past rule of thumb has been 3K miles or 3 months you need an oil change, I was wondering if this is still true? I normally go 6-8 months between oil changes, but always at the 3K mark.
Basically, has this oil broken down enough by just sitting that it really needs to be changed or should I stick with the 3K plan on oil changing?