What is Engine Break-In? [quote]Engine break-in, also known as running in, is the procedure of conditioning the new engine of a vehicle by following specific driving guidelines during the first few hours of its use. The focus of breaking-in an engine is on the contact between the piston rings of the engine and the cylinder wall. There is no universal preparation or set of instructions for breaking in an engine. Most importantly, experts disagree on whether it is better to start engines on high or low power to break them in. While there are still consequences to an unsuccessful break-in, they are harder to quantify on modern engines than on older models. People no longer break in the engines of their own vehicles after purchasing a car or motorcycle as the process is done in production.[/quote] [quote]Ok, this is compulsory when you got a new car/bike or whatever your wheels are. Proper engine break in will produce an engine that achieves maximum power output with the least amount of oil consumption due to the fact that the piston rings have seated properly to the cylinder wall. When the piston rings are broken in or seated, they do not allow combustion gases to escape the combustion chamber past the piston rings into the crankcase section of the engine. This lack of "blow-by" keeps your engine running cleaner and cooler by preventing hot combustion gases and by-products from entering the crankcase section of the engine. Excessive "blow-by" will cause the crankcase section of the engine to become pressurized and contaminated with combustion gases, which in turn will force normal oil vapors out of the engine's breather, causing the engine to consume excessive amounts of oil.[/quote] i just wanna see your posts on what do you prefer when it comes to breaking-in your engine. Motorists and Non-motorists are welcome to post your comments and reactions about this Engine Break In.