I'd like to ask this before I get to many miles on my Mustang GT. What do you recommend for break in? Drive it hard so it responds quickly. Or baby it to a certain point then let it all break loose.

 

'babying' it should not be necessary. Most if not all new engines are engineered well enough that a ‘break in’ period should not be required. Used to be that it was recommended that you go 1000 miles or so before really getting on it.

 

That being said I wouldn't take it to the track right away.

 

The first thousand miles, you should drive it over the whole power range...that means commuting style driving, some highway driving, long range, short range, runs to the grocery store, etc.

You want to do that so all the moving parts have a chance to break in over their whole range of movement.

 

well im typically driving 45-50 all day, slowest being 30 fastest being 55. If I have a place I can do are you saying its a good idea to maybe bring it up to 100-120 once a month or so?

 

Only if you have a 1954 Porsche

Normal range (25-65mph) driving should seat everything fine...

 

Ha, well thats the speed im typically driving around my neighborhood and such! The police around here are strict as heck and I'm sure they won't be after me in this car

 

I was wondering that too... I'm to be picking mine up in Illinois this week and have several hundred miles to drive...
With other vehicles, I stayed in town to buy them, and didn't have to worry too much.
Any suguestions... Should I take side roads home to avoid the freeway and consistant speed?

 

Per the 2005 Mustang Owners manual:

"Your vehicle does not need extensive break-in. Try not to drive continuously at the same speed for the first 1,000 miles of new vehicle operation. Vary your speed frequently in order to give the moving parts a chance to break-in.
Do not add friction modifier compounds or special break-in oils during the first few thousand miles of operation, since these additives may prevent piston ring seating."

No cruise control...take it easy for the first 1000 miles and your pony will live a happy, smoke free life.

 

Good Info Donkey.... I just moved to Nashville, neighbor.

 

Watch out for deputy dog. :cop:


After 1000mi change o/f & use Mobil 1.

 

I'll be driving it hard for the first 1,000 miles, like I plan to almost all of the time. I'll just stay away from the redline

 

You do not need to take it that easy. I would be pretty robust with the throttle, I would skip some extreme clutch dumps for a few hundred miles though. The computer knows what hurts the engine and won't let you harm it anyway. The heavy stuff like burnouts are more of a drivetrain break-in issue then engine, the engine has no idea if the tires are smoking or not.

 

Nothing but the best.
You'll have to use a 0W-20.
Mobil1 does not come in a 5W-20 as recommended.

 

Forget Mobile One then. I know that in todays engines its important to use the recommended 5W-20. My 300C doesn't run right if you switch. I know that has to do with the cylinders turning off at cruse speed but still. I would not deviate.

 

First of all, your Mustang could very well be broken in before you even get it, if it has been demoed. Contrary to popular belief, cars are broken in within the first few hours of being run.

Secondly, breaking in the engine has nothing to do with the speed of the car, so you don't need to take it up to 120. Just make sure that you get the engine itself to run everywhere in the RPM range, from idle to redline, and do it under varying loads as well.

The manufacturer says 1000 miles, but that is just to be safe. It's really more like 100 or so.

 

Motor oil has nothing to do with the way the motor runs unless of coarse you don't have any. Check your dealer for a service report on the cylinder cut off module. There should be one soon if not already.

 

Check out this website on breaking in engines. Allot of the stuff on here makes sense, I recommend giving it a read. This site recommends a hard initial break in to get valves to seat properly and a very early non-synthetic first oil change.

http://www.mototuneusa.com/break_in_secrets.htm

 

Hands off cruise control...need a good radar detector...welcome to the site brod0056

 

http://www.mototuneusa.com/break_in_secrets.htm

I followed all the same break in "secrets"on my Toro lawnmower which runs great, so it should work on the new Mustang as well.