Breaking in a new GT

[jasonstang]

Before first 1k, some half throttle mid rpm pulls.
Before 2k, 3/4 throttle and keep her under redline.
Change oil and let her rip.

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[Swayse]

Complete warm up, oil up to temp, then I do a pull, 3,000 to 7,000 in 3rd or 4 th gear, then engine brake back down to 3,000 rpm. I do this a few times every time I drive a brand new car, with a nice cool down drive after, 5 miles. Until I hit 1,000 miles, then I start beating on it.

 

[ScottsGT]

Mileage sucked ass on my first 500-1000 miles and then it finally picked up. You bought a Mustang, not a Prius. Don't worry, be happy!

 

[Zerobar78]

Your owners manual tells you the process, the biggest thing is not to lug the engine during break-in and keep the rpm's varied(no cruise control on a long trip).

 

[Hashbrownn]

I picked up my car from the dealer and took it up to about 5-6K RPM on every gear going up the on ramp of I-85/40 with 4miles on the odometer. I don't baby my cars.

 

[Chameleon]

Official S550 Mustang break-in video.

Fixed.

[ame]

 

[CorryBasler]

I always trade in my cars at like 30k miles anyways, so I don't really care if the engine doesn't last for the next owner lol as long as it runs while I own it.

I say drive it like you would normally, don't go super extreme but don't baby it either for the first 1k miles or so. If something breaks on it, that is why you have a 60k mile warranty.

 

[65sohc]

Complete warm up, oil up to temp, then I do a pull, 3,000 to 7,000 in 3rd or 4 th gear, then engine brake back down to 3,000 rpm. I do this a few times every time I drive a brand new car, with a nice cool down drive after, 5 miles. Until I hit 1,000 miles, then I start beating on it.

This is what I do as well, the key being oil at normal operating temp. As long as the oil is 170 plus it probably doesn't make a difference how you drive. Since your car already has 1100 miles, whatever breakin was going to happen has already occurred and, in any case, the engine will last longer than you will own the car. I have a friend who was a mechanic for 25 years, FWIW. He says the theory behind breaking in an engine hard is that at high load, high rpm there is greater momentum. Thus the piston travels slightly farther. As the rings mate with the cylinder walls a slight ridge is formed at the top. If it is run gently the excursion of the piston is slightly less and ridge forms at a slightly lower level and creates resistance. Conversely, if it is run hard during the breakin process the ridge forms at the absolute upper limit of piston travel and does not contribute to limiting power. I don't know if any of this is true or if it applies to modern engines. BUT, it's something to think about.

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