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Constant speeds and the break in period #4465315
07/20/17 06:43 PM
07/20/17 06:43 PM
Joined: Mar 2013
Posts: 24
TX
Idlewild294 Offline OP
Idlewild294  Offline OP
Joined: Mar 2013
Posts: 24
TX
I've got a new Toyota Tundra and I hate to admit, but out of habit, I used my cruise control during several 30-50 mile highway trips during the break in period. I see the manual recommends not to drive constant speeds for extended periods. I've got about 400 miles on the clock now, and I'll pay extra close attention to my speeds over the next 600 miles. Should I be concerned about any potential issues due to my ignorance? Any advice or opinions are appreciated.

Re: Constant speeds and the break in period [Re: Idlewild294] #4465327
07/20/17 06:53 PM
07/20/17 06:53 PM
Joined: Oct 2014
Posts: 11,844
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,844
Idaho
No, just drive it. Every once in a while let it run up through the gears when safe to do.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Constant speeds and the break in period [Re: Idlewild294] #4465330
07/20/17 06:53 PM
07/20/17 06:53 PM
Joined: May 2012
Posts: 1,400
Georgia
AVB Offline
AVB  Offline
Joined: May 2012
Posts: 1,400
Georgia
I bet you just voided your warranty. The techs will know what you did when they hook their computer to your truck.

Re: Constant speeds and the break in period [Re: AVB] #4465337
07/20/17 06:59 PM
07/20/17 06:59 PM
Joined: Mar 2013
Posts: 24
TX
Idlewild294 Offline OP
Idlewild294  Offline OP
Joined: Mar 2013
Posts: 24
TX
crush thanks AVB!

Last edited by Idlewild294; 07/20/17 07:00 PM.
Re: Constant speeds and the break in period [Re: Idlewild294] #4465356
07/20/17 07:15 PM
07/20/17 07:15 PM
Joined: Mar 2017
Posts: 5,435
Soviet State of Washington
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 5,435
Soviet State of Washington
The main point to remember during the break in process is to drive sensibly. Don't push it for the first 500-1000 miles. Other parts of the vehicle are breaking in as well like the transmission, brakes, diffs, etc.


2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter

Re: Constant speeds and the break in period [Re: Idlewild294] #4465390
07/20/17 07:37 PM
07/20/17 07:37 PM
Joined: Jun 2008
Posts: 63
Oregon
TwoWheelRider Offline
TwoWheelRider  Offline
Joined: Jun 2008
Posts: 63
Oregon
I have yet to have an issue with engine break in. However, I had an Isuzu engine that blew its piston rings, a Subaru engine that blew head gaskets and a Honda engine that had major fuel dilution issues. None of that was break in related. I just don't go bunkers on it and that works for me.

Almost the first drive with my 2016 Golf was a 500 mile freeway trip, much of it at constant speeds, and it consumes no oil at 13,000 miles, and I get 40mpg on the freeway.

Lose no sleep over it.

Last edited by TwoWheelRider; 07/20/17 07:39 PM.

2016 VW Golf (Valvoline 5w-40 MST)
2015 Honda CR-V (Valvoline Full Synth HIMI 0w-20)
2014 Fuji Absolute 2.0 (human blood)
Re: Constant speeds and the break in period [Re: Idlewild294] #4465400
07/20/17 07:43 PM
07/20/17 07:43 PM
Joined: May 2012
Posts: 1,400
Georgia
AVB Offline
AVB  Offline
Joined: May 2012
Posts: 1,400
Georgia
lol. I have witnessed a brand new Cadillac CTS-V do 148 with 4 techs riding in it. I have seen brand new vehicles drag race other brand new vehicles during the PDI. You don't know how it was treated prior to you. It is kind of a double edged sword, if something is going to break you want it to happen while it is under warranty.

Re: Constant speeds and the break in period [Re: Idlewild294] #4465426
07/20/17 08:09 PM
07/20/17 08:09 PM
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
I advocate the mototune USA method. You have to load the engine to seal the rings


2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30
Re: Constant speeds and the break in period [Re: Idlewild294] #4465427
07/20/17 08:10 PM
07/20/17 08:10 PM
Joined: May 2014
Posts: 1,232
Minnesota
philipp10 Offline
philipp10  Offline
Joined: May 2014
Posts: 1,232
Minnesota
For the life of me I cannot understand the break in routines. Other than not stomping on it (resulting in high cylinder pressures), how and why would variable rpm matter. The piston still goes up and down in the bore.

Re: Constant speeds and the break in period [Re: Idlewild294] #4465431
07/20/17 08:13 PM
07/20/17 08:13 PM
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
You want to increase cylinder pressure because that is what forces the rings against the cylinder wall and let's them wear into a good seal. Varying speeds is just lawyer speak for give it some gas and don't cruise at light throttle. Google mototune USA and read.


2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30
Re: Constant speeds and the break in period [Re: Idlewild294] #4465437
07/20/17 08:20 PM
07/20/17 08:20 PM
Joined: Feb 2013
Posts: 1,047
Prospect, KY
spk2000 Offline
spk2000  Offline
Joined: Feb 2013
Posts: 1,047
Prospect, KY
Most new trucks at Ford get torture tested doing 80+mph right out the gate in their large parking lots. Lots of tire squealing everywhere at the plant for F250 - F450. Seems like the Stock Michelins burn more than the Goodyear's on similar trucks. just an observation though no real testing.

On the other hand I have own a Kawasaki ninja and a buddy bought the same. He took it easy broke it in gently and his is a dog compared with mine. I easily take him off the start and leave him in all gears at any speed. He is so PO'd about it and wonders why he followed break in rules and I hammered mine from the start. No issues yet with mine in any way at 14,000 miles. His is fine too but just doggier. Not sure if it's related to the break in method but again an observation without data to support.


96 Grand Marquis
01 Sable LS
02 Montero
Re: Constant speeds and the break in period [Re: Idlewild294] #4465442
07/20/17 08:23 PM
07/20/17 08:23 PM
Joined: May 2012
Posts: 1,400
Georgia
AVB Offline
AVB  Offline
Joined: May 2012
Posts: 1,400
Georgia
You got to make sure the stickers are burned off of the exhaust before you can put it on the lot.

Re: Constant speeds and the break in period [Re: Idlewild294] #4465451
07/20/17 08:28 PM
07/20/17 08:28 PM
Joined: Feb 2013
Posts: 1,047
Prospect, KY
spk2000 Offline
spk2000  Offline
Joined: Feb 2013
Posts: 1,047
Prospect, KY
We put sticker or "catchword" tape on some exhaust components but not all of them.

people writing those manual are technical writers hired for that purpose and they generally have no idea just take someone else words and translate into a manual.


96 Grand Marquis
01 Sable LS
02 Montero
Re: Constant speeds and the break in period [Re: Idlewild294] #4465465
07/20/17 08:38 PM
07/20/17 08:38 PM
Joined: Jun 2007
Posts: 3,475
Morris County NJ
steve20 Offline
steve20  Offline
Joined: Jun 2007
Posts: 3,475
Morris County NJ
I just finished for the most part, breaking-in an Audi 2.0 GDiT---800 miles of purposeful driving with much varying rpm. As of today, with a max speed of 57 mph so far and a total of 700 miles, I felt it was time to wring it out a bit. Using about 1/3 throttle I manually shifted at 4K rpm thru first second third and into 4th gear--felt real sweet, even though it was 95 degrees this afternoon. That is about the most wicked I would ever get during the first 2K miles of break in.
Steve



Re: Constant speeds and the break in period [Re: Idlewild294] #4465479
07/20/17 08:51 PM
07/20/17 08:51 PM
Joined: Dec 2002
Posts: 1,566
North Carolina
Rat407 Offline
Rat407  Offline
Joined: Dec 2002
Posts: 1,566
North Carolina
Drove every new vehicle off the lot like I drove the traded in vehicle. Never an issue in 35yrs of getting new vehicles.


2002 Silverado 5.3 0w-20 AMSOIL
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