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[seamus2154]

Do a search here and you'll find this subject covered. But having broken in alot of new cars w/ no problems I'll give you my 2 cents about what I've picked up over the years. Stop and go is great for the 1st 100-200 mls w/ no full throttle and max 50 mph. This is good for the brakes, rear, clutch and trans especially. After 500 miles the motor is mostly broken in. Your brakes are broken in also. The rear and trans take 1000 mls to break in so no high speed or you will get the dreaded whine in the rear as some have. My dealer told me he has seen many Z's getting the rear warranteed due to improper break in related to abuse before 1000 mls. No full throttle for the 1000 mls. At 1000 mls as the book says you can start getting on it gradually and have some fun. The break in is pretty important for the long term. Also I like to do some slow figure eights in a parking lot during the first 500 miles to work in the rear fluid into the rear clutch pak which helps speed up the break in and avoid the rear chatter some get. Remember your clutch is like your brake pads and have to mate to your flywheel so no holeshots till done w/ the break in. I drop the oil btwn 500 and 1000 mls, because new engines shed a bit of metal during break in while everything meshes. It's a 75 dollar insurance policy for a 75000 dollar car,your call. There are no filters on the rrear or trans so I drop those fluids after 4-5000 mls because of the meshing of new gears and switch to Amsoil fluids which I find to be good stuff. Then go kick the sh## out of it. Oh best of luck w/ the new Z!!! Congrats on the babies!