2005-2009 Mustang Information on The S197 {Gen1}

Break-In Period on the '05 GT

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Old 10/25/04 | 02:00 PM
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I'm pretty sure I remember reading in the owners manual that you just need to do what Dan said...very the RPMs throughout the whole range and try to avoid driving at the same speed/rpm for extended periods for the first 1000 miles or so.

I think they might have specifically said NOT to baby it (i.e. keeping it under 3000 RPM). I know this has been discussed in other treads as well.
Old 10/25/04 | 02:40 PM
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I'm pretty sure that there is no restriction on rpm. I think you should eventually get it up to 5-6k or so after a few dozen miles.

You have to TELL IT, its a racehorse so that it knows you expect a lot out of it later.
Old 10/25/04 | 03:52 PM
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hahaha great quote dan
Old 10/25/04 | 03:56 PM
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mine was begging to get jumped on.....i gave er a lil gas and it was like MORE MORE!....i am babying it but trying to vary the RPM's as well...mainly just driving it normal without racing it. Im still a firm believer in letting everything get used to what its gonna do
Old 10/25/04 | 04:41 PM
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STOP pussyfooting around.........HIT that pedal and SEAT those valves!
Old 10/25/04 | 04:44 PM
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I'm going to be putting 1500 miles on it less than 2 weeks after i have it. Ohio to colorado. I did it once before, but this time i'll be with my sister and i'll have a sound system that works.
Old 10/25/04 | 04:55 PM
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I have kept my ponies under 3.5K rpms for the first 1K miles and the first oil change within the same period without any engine issues.
Old 10/25/04 | 05:24 PM
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im taking all these tips to heart because i gotta make sure i break her in right when i get her
Old 10/25/04 | 07:44 PM
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Talking

For all those who have the GT models, does anyone know what Ford's recommended specifications for the break in period is, like is it no more than 50 MPH for the first 1500 miles or something like that.....?
Old 10/25/04 | 08:25 PM
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You need to vary the rpm (though the whole range) for the first 1000 miles or so.

These engines don't really need to be broken-in. Basically, just drive the car and use your rev range. Tolerances are so tight nowadays I don't think there is any need to drive it easy so things "seat" themselves.

I plan on driving normally right off the lot and performing the scheduled oil changes. Probably no hard launches but while moving I'll be revving it pretty high once in a while as per above.

Hope that helps.
Old 10/25/04 | 08:38 PM
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I heard once that Ford bench runs each engine to sort of give it a running in before they get beat up by the general public.... save money on warranty issues.... was I misinformed?
I know when I got my '98, I was just pretty easy on it.... varied the rev range, didn't take it much faster than 3000 rpms for the first 3000 miles. After that I just worked it into higher rpms a little bit at a time. I know thats more of an old school method which is kinda obsolete these days, but I wasn't takin' any chances. Ran like a raped ape though when I finally opened her up.
That's a good question, Paul. .... I've been through a handful of engines and that's the way they were broken in, but they were pushrod motors. I know that these are way different and I'd be curious to know what the word is from Ford's engineers.
Can anyone speak to that?
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