New top rated oil

Here is an odd bit of information. Honda has used high amounts of Molybdenum in their Dino brake-in oil. They recommend 3K or so. Many were runing it over until their oil change warning got down to 10% or less and over a year.

Note, after 2 years of production they changed over to full syntetic with high Molybdenum content, which happened to be in line with the their fix with ring sealing and oil consumption.

The original owner of our car had the brake-in oil changed within a years time, at less than 3k.

While many complained about piston ring sealing issues, with oil consumption, after completing their break in oil change.

Ours never used more than 1/2 quart per oil change.

Assuming high Molybdenum brake-in oil gets broken down after time, along with fuel contamination on extended use, its more about changing out your oil sooner than later during brake-in.

I read from an old racer on a old Amxterminator mag, that when breaking in an engine, the first 2 minutes are critical. After 2 minutes of idle, he dumps the oil and checks and looks at his filters, then replaces filters, and fills with new oil, then continues with break in.

On my most recent build I used Joe Gibbs racing oil for break in, then changed to Walmart dinosaur oil. I use synthetic in my modern vehicles that require synthetic. On my 50 year old cars, I use conventional oil. They don’t get as many miles between changes, and today’s conventional oil is a dozen generations better than what the engines were designed for.