rev the engine while driving? I had a test drive in one yesterday and was revving it between 4500RPM and 5000RPM, I take it that this is not safe for a new engine?
The key to proper engine break-in is pretty simple. here are some guidelines.
1: apply varying engine loading for the first month of driving. Avoid using a constant rpm and throttle position. This will ensure that every moving part in the engine gets exposed to the engines potential for power output. Your engine will be happiest later on in life this way.
2: change the oil and oil filter strictly at 2000 mile intervals for the first three changes. A new engine produces alot of metal shavings during the break-in period because all the parts are being worn to proper tolerance.
3: Don't exceed 2/3 the maximum RPM for the first 6000 miles. Use full throttle occasionally, but don't rev it too high for the first few months.