New Prius but bad bad break-in

Since you broke the rules, you are probably doomed to driving a car that gets high MPGs.

 

So you will only get 100,000 miles without an issue as opposed to 200,000. I wouldn't worry about it too much. The engines are much better made these days and I believe they also run them in at the factory for a period of time.
No worries.

 

Rules are meant to be broken. I believe I broke the rough-in rule plenty of times cause I drive exclusively in PWR mode and use CC all the time even in city driving, right from the get go.

I don't see my Prius ICE having been harmed anyway for the fact that it's giving me 55 mpg average still.

 

cars are made better these days.

that rule was designed to keep your gas mileage up... rough break in gives the metal less time to adjust to it's new life...

i had a rough break in... 113 miles of not following the rules. (the drive home) i always get 5 mpg or so less than everyone else now. shrug... hypermile numbers are hard to achieve.

it's said hard break-ins wreck the cams... (tiny bit less efficient)
honestly... that cam is really hard.. and if i wore it wrong.... it's still doing really well. (better than the other cars around me on a daily drive) i'm more worried that i've towed with the car multiple times. (yet not worried at all)

u shouldn't be all that worried... unless you're a mpg freak...... then you just ruined your chances at the mpg cup.

 

Hi Anand,

The rule about constant speed is a misnomer for the Prius. Its a carry-over from standard cars. The Prius engine is all over the RPM map when the car is at constant speed, most places. Which is what you want for engine break-in. Now if you were on dead-flat Kansas/Oklahoma roads, the engine might run at a constant RPM, under cruise control on a highway but most every place else, the engine is going to be varying in speed.

As long as you did not do prolonged high power you should be OK. Your hill climb might be such, its not clear how long it was. Mechanics say that high RPM is OK, as long as its momentary in a new engine.

 

It's a Toyota - it'll be fine

 

I picked up my 2010 Prius 3 weekends ago and am already at 2300 miles. I bought it to drive. Someone else said it - even when on cruise control the engine rpm is all over the map as it gears down to climb a hill or shuts off down a hill. In the old days a car would have special break-in oil that would be changed out within a short time. The original oil in the Prius isn't due to be changed for 10,000 miles which I'd interpret as Toyota having a lot of confidence that the engine doesn't change much during break-in.

I put 1100 miles/week on my car because of my long commute. I don't plan on doing anything at all to the Prius other than change oil, filters, and tires for the first 100k miles. I might even skip the 120k spark plug change if it isn't something I can easily do myself.

 

The title of this thread is misleading...I thought your car got robbed.

 

That's why I called it rough-in.

 

This is a misconception. Your Prius has full power available in all modes, assuming you are willing to press the accelerator. Power mode changes the mapping of the accelerator pedal, so it takes less pressure to feel the power, but it produces no more power.

Tom