this sound correct? this is how im thinking of running in my engine... N75 Disconnected. using Millers 10W40 Running In Oil 20mile oil change and filter +50 mile oil change and filter then after those 70 ish miles start using a a cheap 5w40 fully synth oil +150mile oil change and filter +250 mile oil change and filter then once i hit 500 mile use quantum 5w40 fully synth from there onwards!? Start from cold, run around the block a few times until coolant reached 90c, back to house and checked for leaks. Then, avoiding idling, constant speeds, constant load as much as possible. Once on the more open roads, i started a series of controlled pulls in third gear, from ~1500rpm to 4000rpm, at 50% throttle, then lifting off and allowing the engine to coast back down (clutch still engaged). Over approx 10 miles i steadily increased this until i was doing 2000-6000rpm at 100% throttle, again lifting and letting the engine coast back down thru the RPM's, and driving for a few minutes steadily but avoiding constant load between pulls. After a total of about 30miles i was back home. Drained/refilled the oil and fitted new filter. Then i drove the car normally, although i still tried to avoid constant load (ie motorway) for the first 500miles or so. When i did have to use the motorway i constantly varied my speed between 60 and 80 so the engine was seeing different loadings all the time. That first 25miles is crucial, you need load to get the rings bed in, and the overrun at high RPMs helps scavenge all the debris out the cylinders. Drive it like a granny during this period and the rings wont properly bed in, you'll end up with poor sealing, and a limp engine. any help would be appricted! - would it not be best to go through the gears more when running in? rather than mainly 3rd? first 20mile i mean.. - also should i be going up to 100% thorttle within first 20 mile? or just keep at 50% thankyou for any info! i copied some of the information from a previous post on here. james.