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Old 05-07-2012, 07:23 PM
dougc75 dougc75 is offline
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Breaking in a new 5.4L motor

What is the correct procedure for breaking in a new motor? Just received a new 5.4L motor after 69000km. The service dept was no help.
They told me to just drive it easy, I asked them for how long? They just had a stunned look on there face and shrugged there shoulders. It's hard to find a good FORD service dept in central Alberta.
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Old 05-07-2012, 08:10 PM
Greg B Greg B is offline
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Just follow the procedure spelled out in the owner manual. Vary your speed a lot for the first few hundred miles or about 900 km's and don't do any towing for the 1st 1000 km's.
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Old 05-07-2012, 08:19 PM
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Chris Anchor Chris Anchor is offline
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When I got my new truck in 2009, I varied the speed as per booklet but I didn't stay with their oil change schedule. I changed the oil/filter every 3K miles till I had about 30K on the truck, now at 75K miles runs perfect. Nor did I tow any real weight till about 8K miles. Chris
2009 F-150 XLT 4x4 5.4 Regular Cab 8' box 3.73 rear/max tow/8200 lbs GVW/built in controller-One towing/ hauling machine
2012 F-150 XLT 4x4 Ecoboost SuperCrew 6.5 box 3.31 rear A fancy Loaded Sunday go to meeting Truck-Wendy's
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Old 05-07-2012, 08:27 PM
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seventyseven250 seventyseven250 is offline
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Break-in used to be something that was done by hard-and-fast rules. these days, the way engines are manufactured is different, meaning that the traditional rules may not apply. Meaning that everyone disagrees about the rules.

the only thing that people seem to agree on is that you need to vary RPM for "a while."
some of the people I respect most suggest driving vigorously right from the first day, lots of hard starts. Some people like to baby it for a while.

If it was mine, I'd drive like I stole it from the first day.
2012 F150 SuperCrew EcoBoost 4x4 XLT/XTR 145" WB 3.31 Axle

Originally Posted by Jklnhyd View Post
Holy hell, its not even 9am and you folks are gonna drive me to drink....
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Old 05-07-2012, 08:27 PM

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