I've seen numerous suggestions for break in procedures and their accompanying justifications. What I haven't seen are much in the way of data pertaining to the long term results of those methods on the engines. I like Aklim's idea of going by the builder's instructions just in case anything goes wrong.

Did you get my PM?

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.