On Sun, 11 May 2008 18:19:48 -0700, jim beam wrote:
> Hachiroku ハチロク wrote:
>> On Sat, 10 May 2008 08:30:50 -0700, jim beam wrote:
>>
>>> Jeff wrote:
>>>> Hachiroku ハチロク wrote:
>>>>> On Sat, 10 May 2008 00:19:20 -0600, Bow Wow wrote:
>>>>>
>>>>>> I was planning on taking my soon to take possession Highlander V6
on
>>>>>> a trip which will consist mostly of highway driving of about
>>>>>> 3000mile drive
>>>>>> and been told that that's not such a good idea because you don't
>>>>>> want to drive a brand new car on the highway for any extended
amount
>>>>>> if you can help before the car's properly broken in.
>>>>>>
>>>>>> The seals, rings and the machine just needs to set in properly,
>>>>>> which happens during the break in period and before that, I was
told
>>>>>> you should
>>>>>> avoid any long highway trip.
>>>>>>
>>>>>> What do you guys think? If this was your car, would you do it or
>>>>>> put off
>>>>>> the trip until after the car's broken in properly? Thanks.
>>>>> I'm old-school. I drive a car 1500 miles and then do the first oil
>>>>> change.
>>>>> Then I do the next one at 3000 miles, and every 3-3500 after that.
>>>>>
>>>>> I also had 3 cars go over 250,000 miles without burning oil.
>>>>> Five-hundred miles is approx 8 hours. I would prbably go pretty easy
>>>>> for the first 1,000 miles, secondary roads and short stretches on
the
>>>>> highway around cities. This will do two things; allow the machine to
>>>>> run at something other than wide open, and force variations in load
>>>>> and speed like the manual says to do.
>>>>>
>>>>> It seems I can tell when a car was broken in properly or not. On
cars
>>>>> I had had new, they don't tend to develop 'notches' at certain
>>>>> speeds. By this I mean, on cars other than ones I bought new, I can
>>>>> notice that the car seems to hit a stride ~45-50 MPH, and another
~70
>>>>> MPH. What I assume is that the person that bought the car new had
two
>>>>> driving modes: secondary roads (45 MPH) and highway (70 MPH). I have
>>>>> noticed this on a few used cars I have owned.
>>>>>
>>>>> On cars I bought new and broke in properly, there weren't any
>>>>> 'notches', everything was fairly even across the range. You will hit
>>>>> speeds and conditions on any car, no matter how it was broken in due
>>>>> to engine and mechanical efficiencies. On most 4 cylinder Toyotas I
>>>>> have owned, they seem to hit their stride 70~75 MPH, since I assume
>>>>> this is the engine's most efficient mode. I have noticed this on 4
or
>>>>> 5 Toyotas
>>>>> I have owned. Always got the best economy at about 72 MPH in 5th
>>>>> gear.
>>>> How do you know that the speeds that the cars were driven at had
>>>> anything to do with these "strides"? And why would driving a car a
>>>> particular speed cause this?
>>>>
>>>> I think you don't know what you're talking about.
>>>>
>>>> From the owner's manual for a 2008 Pilot:
>>>>
>>>> "Help assure your vehicle’s future
>>>> reliability and performance by paying extra attention to how you
drive
>>>> during the first 600 miles (1,000 km). During this period: Avoid
>>>> full-throttle starts and rapid
>>>> acceleration.
>>>> Do not change the oil until the
>>>> scheduled maintenance time.
>>>> Avoid hard braking for the first
>>>> 200 miles (300 km).
>>>> Do not tow a trailer.
>>>> You should also follow these
>>>> recommendations with an
>>>> overhauled or exchanged engine, or
>>>> when the brakes are replaced."
>>>>
>>>> Note what the manual says about the first oil change.
>>>>
>>>>
>>>>
>>>>> Of course, with newer cars and a V6, things are different now, but I
>>>>> would
>>>>> still take it pretty easy for the first 1500 miles, and stop and
have
>>>>> the oil changed.
>>>
>>>
>>> what??? read the manual??? no freakin' chance buddy! we're all
going
>>> to have a retardation contest here on usenet and take the words of
>>> nameless idiots with our new multi-thousand dollar investments, not
the
>>> experts that researched, designed and manufactured the freakin' thing!
>>>
>>> imagine these guys in aerospace: "yeah, but this guy said those
cracks
>>> didn't matter".
>>
>> You have had how many cars >230,000 miles?
>
> a few actually. 306k was my highest [verifiable] mileage. but wtf has
> that got to do with inability to read manuals???
I doubt the manual was written with a 3,000 mile all-at-once break in in
mind.
>
>
>
>> Feh.
>>
>>
>> Some things change, some things don't. Rings and cylinder walls are
>> still about the same as they were 20 years ago.
>
> "about the same"??? you want to be imprecise so you can claim whatever
> you want that way??? or are you saying "about" you don't actually know
> the details??? [rhetorical]
>
> it's untrue if you think there are no changes - there are small but
subtle
> changes to lip profiles that help with power and economy, and there are
> improvements to honing processes giving better cylinder wall finish, and
> quality.
All the more reason to pay particular attention to the break in period,
especially when driving long distances during that period.
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