How to drive on the Highway during Break-in? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

MisterGoober · 12-28-2021, 01:37 PM

Trying to keep the revs under 4k as much as possible during the break-in period.

I always believed that accelerating in the highest gear was a no-no (hard on the engine). The problem is if i'm doing 70-80 in 6th, I can't drop down to 5th without the rpms shooting over 4k.

Any thoughts? Short term issue as i'm going to get enough miles on the car to pass the break-in.

azndavepgh · 12-28-2021, 01:54 PM

I just did a 500 mile highway trip where I varied my speed enough to run between 2700 and 4000 RPM. Traffic wasn't heavy so I was able to slow down and speed up without annoying anyone.

TommyW · 12-28-2021, 03:09 PM

Use break in oil to get the rings seated quicker and better.

AK2112 · 12-28-2021, 03:41 PM

Don't worry about it.

sds · 12-28-2021, 05:30 PM

You want to be putting load on the motor. There’s nothing wrong with using 6th gear to accelerate at 3K RPM.

The whole point of breaking the motor in is to seat the rings using moderate to high cylinder pressures (progressively increasing). That’s going to be in the 3-4K RPM range with moderate to heavy throttle.

TommyW · 12-28-2021, 05:42 PM

Don't use cruise control

track junkie · 12-28-2021, 06:16 PM

Never lug the engine in high gear at low speeds. This rule applies at all times.
Below what rpms is lugging in the 2.4 engine? I don’t practice the wrong techniques.

sds · 12-28-2021, 06:23 PM

Quote:

Originally Posted by track junkie

Never lug the engine in high gear at low speeds. This rule applies at all times.
Below what rpms is lugging in the 2.4 engine? I don’t practice the wrong techniques.

Do you feel the motor struggling? Vibrating? Failing to accelerate? That's lugging. If the motor can't pull the gear for you, you're lugging it.

jongers · 12-29-2021, 03:16 PM

Is the break in period in the Japanese owners manual 1000km rather than 1000m? I saw someone mention it in another discussion and found this video of a Japanese owner changing the oil after 1000km (3:24 into the video).

Fingat · 12-29-2021, 03:43 PM

Quote:

Originally Posted by jongers

Is the break in period in the Japanese owners manual 1000km rather than 1000m?

Yes

PhatFreshPrince · 01-02-2022, 07:36 PM

The US manual states:
New Vehicle Break-In Driving – the First 1,000 miles (1,600 km)
I was hoping I would only have to drive 1000 km ~ 600 miles to finish the break-in period.

soundman98 · 01-02-2022, 08:46 PM

no reason you can't choose to do that. but if something breaks later, is it worth it?

McMCOO · 01-02-2022, 09:08 PM

With peak torque at 3700, break-in will be less excruciating than the old engine. With the last one you'd have to quit winding right in the dip.

I plan a couple of trips to the coast from SW WA (plus the initial 170 mile drive home). Winding hill will be the perfect way to vary gears and RPM.

azndavepgh · 01-02-2022, 09:57 PM

Quote:

Originally Posted by McMCOO

With peak torque at 3700, break-in will be less excruciating than the old engine. With the last one you'd have to quit winding right in the dip.

I never drove the first gen, but I think the 2.4 has plenty of pull up to 4000 for city driving. Even after the break-in, I'm not usually going past 5000 given the traffic around here.

12-28-2021, 01:37 PM	#1
MisterGoober Member Join Date: Sep 2021 Drives: IS300, WRX, STI, Bicycle Location: TX Posts: 87 Thanks: 2 Thanked 39 Times in 25 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	How to drive on the Highway during Break-in? Trying to keep the revs under 4k as much as possible during the break-in period. I always believed that accelerating in the highest gear was a no-no (hard on the engine). The problem is if i'm doing 70-80 in 6th, I can't drop down to 5th without the rpms shooting over 4k. Any thoughts? Short term issue as i'm going to get enough miles on the car to pass the break-in.

12-28-2021, 05:30 PM	#5
sds Member Join Date: Jan 2013 Drives: '22 BRZ Limited 6MT Location: MA Posts: 81 Thanks: 8 Thanked 60 Times in 36 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	You want to be putting load on the motor. There’s nothing wrong with using 6th gear to accelerate at 3K RPM. The whole point of breaking the motor in is to seat the rings using moderate to high cylinder pressures (progressively increasing). That’s going to be in the 3-4K RPM range with moderate to heavy throttle. Last edited by sds; 12-28-2021 at 05:44 PM.

01-02-2022, 08:46 PM	#12
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,673 Times in 6,781 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	no reason you can't choose to do that. but if something breaks later, is it worth it? __________________ "The time you enjoy wasting is not wasted time"

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12-28-2021, 01:54 PM	#2
azndavepgh Senior Member Join Date: Jul 2021 Drives: 2022 BRZ Location: Pittsburgh, PA Posts: 170 Thanks: 69 Thanked 91 Times in 56 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I just did a 500 mile highway trip where I varied my speed enough to run between 2700 and 4000 RPM. Traffic wasn't heavy so I was able to slow down and speed up without annoying anyone.

12-28-2021, 03:09 PM	#3
TommyW Senior Member Join Date: Feb 2017 Drives: '13 Whiteout Location: San Clemente Posts: 1,491 Thanks: 496 Thanked 1,242 Times in 673 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	Use break in oil to get the rings seated quicker and better.

12-28-2021, 03:41 PM	#4
AK2112 Senior Member Join Date: Oct 2021 Drives: 22 BRZ Location: Chicago Posts: 210 Thanks: 205 Thanked 129 Times in 79 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Don't worry about it.

12-28-2021, 05:42 PM	#6
TommyW Senior Member Join Date: Feb 2017 Drives: '13 Whiteout Location: San Clemente Posts: 1,491 Thanks: 496 Thanked 1,242 Times in 673 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	Don't use cruise control

12-28-2021, 06:16 PM	#7
track junkie Member Join Date: May 2013 Drives: 2022 Subaru BRZ Location: MO Posts: 98 Thanks: 29 Thanked 67 Times in 35 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Never lug the engine in high gear at low speeds. This rule applies at all times. Below what rpms is lugging in the 2.4 engine? I don’t practice the wrong techniques.

12-29-2021, 03:16 PM	#9
jongers Senior Member Join Date: Dec 2019 Drives: 19 86, 22 BRZ Location: CA Posts: 102 Thanks: 220 Thanked 130 Times in 55 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Is the break in period in the Japanese owners manual 1000km rather than 1000m? I saw someone mention it in another discussion and found this video of a Japanese owner changing the oil after 1000km (3:24 into the video).

01-02-2022, 07:36 PM	#11
PhatFreshPrince Senior Member Join Date: Sep 2021 Drives: 2022 BRZ Limited SBP Location: Georgia Posts: 219 Thanks: 125 Thanked 124 Times in 75 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	The US manual states: New Vehicle Break-In Driving – the First 1,000 miles (1,600 km) I was hoping I would only have to drive 1000 km ~ 600 miles to finish the break-in period.

01-02-2022, 09:08 PM	#13
McMCOO Anti-Social Media Join Date: Apr 2021 Drives: 24 GR86 Premium MT is on the way! Location: SW Washington State Posts: 219 Thanks: 121 Thanked 280 Times in 105 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	With peak torque at 3700, break-in will be less excruciating than the old engine. With the last one you'd have to quit winding right in the dip. I plan a couple of trips to the coast from SW WA (plus the initial 170 mile drive home). Winding hill will be the perfect way to vary gears and RPM.

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