I have always broken in an engine slowly and varied the speeds and not going faster than 55 for 500 miles. I have read and some say to break it in like it was stolen. What do most of you think is the best manner? Also I have changed oil at the 500 because of metal particles that the engine gives off, what is thought about that?

 

Your engine wasn't hand assembled from precision made components and put into a high performance super car like a Ferrari, Lambo, Porsche, Bugatti, or ZR1 Vette.

It needs a break in. Believe Jep even has a recommended break in routine.

There's also likely casting flash and other grit and grime in there before the oil was even poured in. Change the oil at 500 miles and 3000 miles.


30 years ago there were people saying you didn't need to break engines or drivetrain components in as well. Wrong then, wrong now. Heat cycles? Wear patterns? Metal brittleness? What?

 

I'm in the process of breaking my 2012 Sahara in this week. I stayed under 60 for the first 300 miles
and will stay under 70 until I reach 1,000 miles. I will make full throttle runs from 50 to 70 once in a
while, pretty much what the owner's manual says. At 1,000 miles, I will change the oil and probably
again at 4,000 miles, but I am OCD about car maintenance, but that's just me. The owner's manual
calls for the first oil change at 8,000 miles, which personally gives me the whim-whams. I couldn't wait that long.

 

I had a Zo6 and I broke it the same way, slow and careful.. I thank you both for your input and I think I will do as I have in the past being careful with it and changing oil more often than they call for. I know of a place that will give oil changes every 3K or 3 months for life and the cost is $200.
Once again thanks for input, I am getting my new one tomorrow and hope to get the miles soon so I cna get some dirt on it..

 

This is copied directly out of the 2012 User Guide:

ENGINE BREAK-IN RECOMMENDATIONS
• A long break-in period is not required for the engine and drivetrain
(transmission and axle) in your vehicle.
• Drive moderately during the first 300 miles (500 km). After the initial
60 miles (100 km), speeds up to 50 or 55 mph (80 or 90 km/h) are
desirable.
• While cruising, brief full-throttle acceleration within the limits of local
traffic laws contributes to a good break-in. Wide-open throttle
acceleration in low gear can be detrimental and should be avoided.
• The engine oil installed in the engine at the factory is a high-quality
energy conserving type lubricant. Oil changes should be consistent with
anticipated climate conditions under which vehicle operations will occur.
For the recommended viscosity and quality grades, refer to “Maintaining
Your Vehicle”.
NOTE: A new engine may consume some oil during its first few thousand
miles (kilometers) of operation. This should be considered a normal part of
the break-in and not interpreted as an indication of difficulty.