Engine break in? How many miles
SUPERCHARGED RED ROCKET ------------------Master-Moderator
Joined: May 11, 2006
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From: Carnegie, PA
GT Member
Joined: August 20, 2012
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From: Western Virginia
Many feel better about changing the factory oil within the first 1000 miles in case of any particles from assembly. You know, bearing material, filings, gasket shavings, cigarette butts, beer tabs... 
The filter should catch it but as a precaution you will read many change it out. I did at 700mi. on Bullitt and always have on a new engine before 1k hits the clock.
The filter should catch it but as a precaution you will read many change it out. I did at 700mi. on Bullitt and always have on a new engine before 1k hits the clock.
I do engines myself, (complete, bores, bearings etc) and have seen only clean oil first change. If the engine is assembled right there should be no debris in the oil.
My Boss engine went 5K on first change and is dead quiet.
Super Boss Lawman Member
Joined: January 17, 2006
Posts: 4,148
Likes: 3
From: Temecula,CA
I follow the other tact, I keep the original fill in the car for 5K miles as recommended. If Ford does add a break in lubricant it is allowed to do what Ford intended, break in the engine. There are scores of people on these boards who changed oil under 1K miles and developed engine noises. I used to do as you described, but changed tactics, with no ill effects. I do engines myself, (complete, bores, bearings etc) and have seen only clean oil first change. If the engine is assembled right there should be no debris in the oil. My Boss engine went 5K on first change and is dead quiet.
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Joined: October 25, 2010
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From: Dearborn, MI
BREAKING-IN
You need to break in new tires for
approximately 300 miles (480
kilometers). During this time, your vehicle
may exhibit some unusual driving
characteristics.
Avoid driving too fast during the first 1000
miles (1600 kilometers). Vary your speed
frequently and change up through the
gears early. Do not labor the engine.
Do not tow during the first 1000 miles
(1600 kilometers).
I hope this helps.
Deysha
Bullitt Member
Joined: September 21, 2008
Posts: 374
Likes: 0
Here is the info from the 2015 Mustang owner’s manual on page 188, guys:
BREAKING-IN
You need to break in new tires for
approximately 300 miles (480
kilometers). During this time, your vehicle
may exhibit some unusual driving
characteristics.
Avoid driving too fast during the first 1000
miles (1600 kilometers). Vary your speed
frequently and change up through the
gears early. Do not labor the engine.
Do not tow during the first 1000 miles
(1600 kilometers).
I hope this helps.
Deysha
BREAKING-IN
You need to break in new tires for
approximately 300 miles (480
kilometers). During this time, your vehicle
may exhibit some unusual driving
characteristics.
Avoid driving too fast during the first 1000
miles (1600 kilometers). Vary your speed
frequently and change up through the
gears early. Do not labor the engine.
Do not tow during the first 1000 miles
(1600 kilometers).
I hope this helps.
Deysha
Bullitt Member
Joined: September 21, 2008
Posts: 374
Likes: 0
Exactly, old tech doesn't hold up to advanced technology.
All my race motors went from Dyno to race track.
All my cars go from dealer to get tuned, then depending on season, to the track.
Never lost a rod bearing, had noise or lost a motor.
So we are to believe you follow the owners manual to the letter?
BS
Mach 1 Member
Joined: April 30, 2014
Posts: 936
Likes: 40
I follow the other tact, I keep the original fill in the car for 5K miles as recommended. If Ford does add a break in lubricant it is allowed to do what Ford intended, break in the engine. There are scores of people on these boards who changed oil under 1K miles and developed engine noises. I used to do as you described, but changed tactics, with no ill effects.
I do engines myself, (complete, bores, bearings etc) and have seen only clean oil first change. If the engine is assembled right there should be no debris in the oil.
My Boss engine went 5K on first change and is dead quiet.
I have 4300 or so on my '14 and was originally planning to wait for the indicator.
Tasca Super Boss 429 Member
Joined: February 2, 2004
Posts: 3,621
Likes: 5
From: Dallas, TX
It isn't in the manual. What's in the manual is what exactly what I posted previously. Wait until the car tells you to change it. It's not going to hurt to change it more often, however.
Super Boss Lawman Member
Joined: January 17, 2006
Posts: 4,148
Likes: 3
From: Temecula,CA
Exactly, old tech doesn't hold up to advanced technology. All my race motors went from Dyno to race track. All my cars go from dealer to get tuned, then depending on season, to the track. Never lost a rod bearing, had noise or lost a motor. So we are to believe you follow the owners manual to the letter? BS
Last edited by SONICBOOST; Dec 17, 2014 at 07:14 PM.
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Joined: August 2, 2013
Posts: 3,090
Likes: 254
From: Little north of Stuttgart, Germany
For some strange reason on the 5.0, that's a common story. It uses oil at first - in some cases quite a lot. (several threads here - many ran 2 qts low because they foolishly did not check it) But after you finally run it good and hard and good and hot, it quits using oil.
Most info says rings are seated quickly within like 100 miles. But I don't know where the excessive oil usage on the 5.0 would come from if it isn't the rings.
I don't know any reports on any engine that valve seals need "seating".
The 4.6L3V wasn't like that. The Manual says mix up the rpm range the first 1000 miles. I quickly worked up to redline (up and out) after the first 100 hundred miles and then played throughout the range - including decel. First oil change at 700 miles, no usage.
Now with 31k, only used 1/2 qt at 5600 miles (with oil sep).
Most info says rings are seated quickly within like 100 miles. But I don't know where the excessive oil usage on the 5.0 would come from if it isn't the rings.
I don't know any reports on any engine that valve seals need "seating".The 4.6L3V wasn't like that. The Manual says mix up the rpm range the first 1000 miles. I quickly worked up to redline (up and out) after the first 100 hundred miles and then played throughout the range - including decel. First oil change at 700 miles, no usage.
Now with 31k, only used 1/2 qt at 5600 miles (with oil sep).
Last edited by 5.M0NSTER; Dec 17, 2014 at 08:34 PM.
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