Ha, an oil analysis cost more than the price of new oil. Back in the pre-PCV days, using that breather pipe sucking up road dust like crazy, regardless of what you did, needed a complete engine rebuild in the 50K mile stage. A lot has changed since then. Prior to the 1949 models, Detroit has adding nickel to the the sheet metal, rust through was rare. But marketing figured out, this was hurting new vehicle sales.
1949 was the year that Detroit discovered rust. Ha, debate what I should do with my old oil, one good use of it would be to paint all over the sheet metal to retard corrosion.
Lots of talk about oil changes, when to do it, many different opinions, but for the last 50 years or so, key reason for dumping a vehicle was it was a pile of rust. Could drive them a bit longer when they had a frame and air conditioning was with holes in the doors. Also history with unibodies, the center of the vehicle starts to sag.
As an old timer, with oil, just look at the color. But with 100K mile PT warranties, follow their rules. Only 40K miles on my Cruze now and already over four years old, so in the next year, won't even come close to that 100K mile mark, but limited by this five year. So all this will be history. Rust also only has a five year warranty.
So you do what they want you to do, throw it away and buy another, this is very good for THEIR economy,