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#4465315 - 07/20/17 06:43 PM Constant speeds and the break in period
Idlewild294 Offline


Registered: 03/09/13
Posts: 23
Loc: 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.

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#4465327 - 07/20/17 06:53 PM Re: Constant speeds and the break in period [Re: Idlewild294]
CT8 Offline


Registered: 10/09/14
Posts: 10934
Loc: Idaho
No, just drive it. Every once in a while let it run up through the gears when safe to do.
_________________________
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

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#4465330 - 07/20/17 06:53 PM Re: Constant speeds and the break in period [Re: Idlewild294]
AVB Offline


Registered: 05/20/12
Posts: 1282
Loc: Georgia
I bet you just voided your warranty. The techs will know what you did when they hook their computer to your truck.

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#4465337 - 07/20/17 06:59 PM Re: Constant speeds and the break in period [Re: AVB]
Idlewild294 Offline


Registered: 03/09/13
Posts: 23
Loc: TX
crush thanks AVB!


Edited by Idlewild294 (07/20/17 07:00 PM)

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#4465356 - 07/20/17 07:15 PM Re: Constant speeds and the break in period [Re: Idlewild294]
PimTac Online   content


Registered: 03/04/17
Posts: 4245
Loc: 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


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#4465390 - 07/20/17 07:37 PM Re: Constant speeds and the break in period [Re: Idlewild294]
TwoWheelRider Offline


Registered: 06/12/08
Posts: 61
Loc: 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.


Edited by TwoWheelRider (07/20/17 07:39 PM)
_________________________
2016 VW Golf (Valvoline 5w-40 MST)
2015 Honda CR-V (PP 0w-20)
2014 Fuji Absolute 2.0 (human blood)

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#4465400 - 07/20/17 07:43 PM Re: Constant speeds and the break in period [Re: Idlewild294]
AVB Offline


Registered: 05/20/12
Posts: 1282
Loc: 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.

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#4465426 - 07/20/17 08:09 PM Re: Constant speeds and the break in period [Re: Idlewild294]
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1657
Loc: 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

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#4465427 - 07/20/17 08:10 PM Re: Constant speeds and the break in period [Re: Idlewild294]
philipp10 Offline


Registered: 05/09/14
Posts: 1171
Loc: 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.

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#4465431 - 07/20/17 08:13 PM Re: Constant speeds and the break in period [Re: Idlewild294]
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1657
Loc: 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

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#4465437 - 07/20/17 08:20 PM Re: Constant speeds and the break in period [Re: Idlewild294]
spk2000 Offline


Registered: 02/19/13
Posts: 984
Loc: 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

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#4465442 - 07/20/17 08:23 PM Re: Constant speeds and the break in period [Re: Idlewild294]
AVB Offline


Registered: 05/20/12
Posts: 1282
Loc: Georgia
You got to make sure the stickers are burned off of the exhaust before you can put it on the lot.

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#4465451 - 07/20/17 08:28 PM Re: Constant speeds and the break in period [Re: Idlewild294]
spk2000 Offline


Registered: 02/19/13
Posts: 984
Loc: 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

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#4465465 - 07/20/17 08:38 PM Re: Constant speeds and the break in period [Re: Idlewild294]
steve20 Offline


Registered: 06/19/07
Posts: 3475
Loc: 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
_________________________


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#4465479 - 07/20/17 08:51 PM Re: Constant speeds and the break in period [Re: Idlewild294]
Rat407 Offline


Registered: 12/13/02
Posts: 1428
Loc: 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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