|My suggested break-in procedure.... (archive)|
Posted by Steve Borsse on September 24, 1998 at 19:12:09:
In Reply to: Suggestions on Break-in period/mileage,max Rpm's posted by and Etc. (eom)Sean on September 24, 1998 at 18:20:22:
Congrats on your new Z3, you'll love it!
The most important thing for a proper and easy break in is to keep your maximum RPM below 4500 for the first 1200 miles(see your manual p. 76), but also being careful not to "lug" the engine with too low an RPM from being in too high a gear. It is also very important to vary the RPM. Otherwise, the engine will tend to take a "set" at a certain RPM if you drive long periods at a steady RPM with a new engine. It's sort of like taking a "memory", the engine will get used to only that RPM and not be as comfortable at others. Also gently accelerate and decelerate from time to time as this "loads" the ring pack on both sides. Gently rev it up, but then let it naturally rev itself down by taking your foot totally off the gas, to put backpressure on the ring set. This helps the rings to seat better!
Also in general remember that better than 80% of all the engine wear occurs from the moment you start up until the engine warms up to regular operating temperature. This is what I do, others may have their own ideas and I respect that!
1. Start the engine gently in neutral, do not drive off for the first 20-30 seconds to allow oil pressure to build up. (My 98/2.8 tends to almost immediately idle down to about 700 RPM which I feel is too low an RPM for proper oil pump operation. I gently push the throttle a touch to try to hold it around 1,000 RPM for this first 20 seconds or so. Then I gently drive off, keeping the RPMs under 2,500 until you see the temp guage show normal operating temp. I own my car outright, and plan to keep it many, many years so at 2,500 miles, I changed the oil and filter with the "Topsider" to Redline 10-40 synthetic. Others have argued that you need more miles before switching to a synthetic, but I felt my rings were fully seated and they were! I now have over 6,000 miles and the oil level has not moved down even in the slightest! The engineers at Redline are top notch as is their products. They will send you a free info packet where you will learn volumes about oil by calling them at 1.800.624.7958
Best of Luck and safe driving!! (:
98/2.8/Boston Green/peanut butter top/beige extended leather/wood/chrome/power top/17"/CD/heated seats/wind deflector/chrome exhaust tips/VI radar det./Noah cover