ring break in time

Bewy said
I get a laugh out of these idiots that put a freshly bored engine on a dyno for 30 min with WOT pulls & claim the rings are now 'broken in'. Broken might be the right word in this case, as the intense heat generated from friction from new surfaces getting acquainted might anneal the rings.

There is no set time for rings fully breaking in, but 2000 miles is a good number. Driving at 50 mph, it would take 40 hrs. Use mineral oil, then switch to your oil of choice.

And an 'in tune' driver you will notice the difference.....The engine feels more lively because it is making more hp from better ring seal & reduced friction.

If it takes 2000 miles to get the rings in the engine is junk.

All rings today, even the most cheap assed rings you can buy are either belt lapped or barrel lapped.

Ring break in time is near zero. You might see a 1-2% reduction in blowby from initial start up until the 4th or 5th pull. Because the rings are in.

The days of long break in times for rings is decades past.

If the rings aren’t in in a short run in time the engine is junk.