New Jeep Break In Advice
JK Enthusiast
Joined: Feb 2009
Posts: 335
Likes: 1
From: Keller, Tx
Copied from a previous post:
"The manual says drive it "moderately" the first 300, after the 1st 60 miles 50 or 55 MPH is desirable. While cruising, brief full throttle acceleration contribute to good break-in. Avoid full throttle in low gear.
I had to drive home via freeway when new. I varied the speed and manually went to 4th gear just to vary everything. 45 or 50 was the slowest, 65 or 70 was the fastest. I jumped off the freeway and came to a complete stop a couple times along the way. I was at 70 or 75 miles when I got home. The last 5 were "easy on it" city miles.
From from 70 or 75 miles till 300 miles, I ran the rpms up a few times to 5K or so. It ran great, had pull, wanted to go.
From 300 till 1,000 miles I just drove it "normal", for me that means 15.5 MPG, my foot is in it and mostly around town.
I felt no difference between 300 miles and 1,000 miles, ran strong, now w/almost 1,400 I still don't feel any difference.
I think it was done w/break-in at 300 miles, like the book says and I'm not surprised, anything now-a-days should be seated and done by 300 miles.
If it's not, I'll be surprised a thousand miles from now.
ETA: rubi w/4.10 "
still runs the same - great!!
"The manual says drive it "moderately" the first 300, after the 1st 60 miles 50 or 55 MPH is desirable. While cruising, brief full throttle acceleration contribute to good break-in. Avoid full throttle in low gear.
I had to drive home via freeway when new. I varied the speed and manually went to 4th gear just to vary everything. 45 or 50 was the slowest, 65 or 70 was the fastest. I jumped off the freeway and came to a complete stop a couple times along the way. I was at 70 or 75 miles when I got home. The last 5 were "easy on it" city miles.
From from 70 or 75 miles till 300 miles, I ran the rpms up a few times to 5K or so. It ran great, had pull, wanted to go.
From 300 till 1,000 miles I just drove it "normal", for me that means 15.5 MPG, my foot is in it and mostly around town.
I felt no difference between 300 miles and 1,000 miles, ran strong, now w/almost 1,400 I still don't feel any difference.
I think it was done w/break-in at 300 miles, like the book says and I'm not surprised, anything now-a-days should be seated and done by 300 miles.
If it's not, I'll be surprised a thousand miles from now.
ETA: rubi w/4.10 "
still runs the same - great!!
Last edited by 03fatboy; Nov 8, 2011 at 08:27 AM.
Thread Starter
JK Newbie
Joined: Oct 2011
Posts: 52
Likes: 0
From: Rochester, MI
Originally Posted by 03fatboy
Copied from a previous post:
"The manual says drive it "moderately" the first 300, after the 1st 60 miles 50 or 55 MPH is desirable. While cruising, brief full throttle acceleration contribute to good break-in. Avoid full throttle in low gear.
I had to drive home via freeway when new. I varied the speed and manually went to 4th gear just to vary everything. 45 or 50 was the slowest, 65 or 70 was the fastest. I jumped off the freeway and came to a complete stop a couple times along the way. I was at 70 or 75 miles when I got home. The last 5 were "easy on it" city miles.
From from 70 or 75 miles till 300 miles, I ran the rpms up a few times to 5K or so. It ran great, had pull, wanted to go.
From 300 till 1,000 miles I just drove it "normal", for me that means 15.5 MPG, my foot is in it and mostly around town.
I felt no difference between 300 miles and 1,000 miles, ran strong, now w/almost 1,400 I still don't feel any difference.
I think it was done w/break-in at 300 miles, like the book says and I'm not surprised, anything now-a-days should be seated and done by 300 miles.
If it's not, I'll be surprised a thousand miles from now.
ETA: rubi w/4.10 "
still runs the same - great!!
"The manual says drive it "moderately" the first 300, after the 1st 60 miles 50 or 55 MPH is desirable. While cruising, brief full throttle acceleration contribute to good break-in. Avoid full throttle in low gear.
I had to drive home via freeway when new. I varied the speed and manually went to 4th gear just to vary everything. 45 or 50 was the slowest, 65 or 70 was the fastest. I jumped off the freeway and came to a complete stop a couple times along the way. I was at 70 or 75 miles when I got home. The last 5 were "easy on it" city miles.
From from 70 or 75 miles till 300 miles, I ran the rpms up a few times to 5K or so. It ran great, had pull, wanted to go.
From 300 till 1,000 miles I just drove it "normal", for me that means 15.5 MPG, my foot is in it and mostly around town.
I felt no difference between 300 miles and 1,000 miles, ran strong, now w/almost 1,400 I still don't feel any difference.
I think it was done w/break-in at 300 miles, like the book says and I'm not surprised, anything now-a-days should be seated and done by 300 miles.
If it's not, I'll be surprised a thousand miles from now.
ETA: rubi w/4.10 "
still runs the same - great!!
I haven't had the opportunity to read the manual yet. I'm sitting at the dealer starting at the JEEP at this moment.
Thanks everyone.
(even the , wouldn't be a forum without some!)
Last edited by Jeepinstein; Nov 8, 2011 at 09:38 AM.
JK Freak
Joined: Nov 2010
Posts: 517
Likes: 0
From: Concord, NC
Originally Posted by Jeepinstein
Very informative. I'm going to have to give it some gas just so I know what it can do, but I'm pretty light-footed. Too many tickets in the teenage years as a cause for that!
I haven't had the opportunity to read the manual yet. I'm sitting at the dealer starting at the car at this moment.
Thanks everyone.
(even the , wouldn't be a forum without some!)
Thread Starter
JK Newbie
Joined: Oct 2011
Posts: 52
Likes: 0
From: Rochester, MI
Originally Posted by DirtyDi
Everything everyone is saying is right... One thing you'll find out, DON'T call her a car. She's a Jeep. Nothing else...
Thanks for the heads up!
Thread Starter
JK Newbie
Joined: Oct 2011
Posts: 52
Likes: 0
From: Rochester, MI
Lift kit and tires when money comes in. That's a must!
I can't help but take this motor up high ever once in awhile too. Very peppy after coming from my I6 4.0 in my grand cherokee.
I can't help but take this motor up high ever once in awhile too. Very peppy after coming from my I6 4.0 in my grand cherokee.
JK Super Freak
Joined: Aug 2011
Posts: 1,262
Likes: 1
From: Mount Hope, WV
Originally Posted by Jeepinstein
Lift kit and tires when money comes in. That's a must!
I can't help but take this motor up high ever once in awhile too. Very peppy after coming from my I6 4.0 in my grand cherokee.
I can't help but take this motor up high ever once in awhile too. Very peppy after coming from my I6 4.0 in my grand cherokee.
Thread Starter
JK Newbie
Joined: Oct 2011
Posts: 52
Likes: 0
From: Rochester, MI
Originally Posted by deathboyardee
Congrats on the new Jeep! I am like you and constantly find myself in the higher RPM's. I also found myself power braking the other day and found that simply beautiful. A stock Jeep burning off a set of 32" mud terrains. I never thought I would see the day
There is enough power to satisfy, that's for sure!
