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Discussion Starter #1
Just took my baby for it's first mountain drive through Mailbu Canyon road, here in Southern California.

I was finally able to take some hard turns and race up a windy mountain road. I love this thing. Handles beautifully. The tiptronic is very nice and responsive when you wanna shift down when doing uphill.

Feel a little bad though, pushed it to 5000 rpm a couple of times. My IS only has 450 miles on it... It sounded great though!
 

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FYI: tiptronic is a trademark not used by Lexus... Try "eShift"...

Sounds like fun, but I wouldn't have pushed my IS300 that hard before 1K miles.
 

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Originally posted by TEG:
FYI:
Sounds like fun, but I wouldn't have pushed my IS300 that hard before 1K miles.
I wouldn't sweat it. Are there any statistics that back up the claim that moderately high revs under 1K miles make the car less reliable in the long run?




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cardinal
'01 Silver/Black
LS, LD, HH, SR, 17"
 

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I don't think pusing the RPMs in the first 1k every now and then will do any harm. If it does it will most likely not be seen or appear until the car is up there in the 100k miles range. By then I will be out of this car and into something like maybe an IS400 in 2003. Think
 

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I plan to keep my IS300 past 100K miles - that is why I am trying to treat it right during break in.

The "agressive driving in the hills" worries me as much as the RPMs. He/she was putting alot of load/stress on that engine.
 

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If you're driving an IS, and it isn't putting a smile on your face, then what's the point ?

--k
 

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This talk of pushing the car worries me. This car is too much fun to baby
. Every once in a while I get the RPM up into red, so hope I'm not going to regret it.

BTW, Sambusik, can't wait to take that malibu drive. Just don't want to push it THAT much.

Love this car. Love it.
 

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Discussion Starter #9
guys,
got this info from a reliable source. This guy works at Honeywell TurboMachinery Engineering. He knows his stuff.

Break in 101:

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Basically, all the engine parts like the crank, the rods, and the pistons,
haven't really taken a set yet. That is they might stretch or change a
little (very little) due to some small stresses from manufacturing.

This process is called stress relieving. Also, the piston rings are matching
up to the cylinder walls right now (scraping off the smallest amount of
metal or deforming it, maybe .0003"). This is when they are making a good
seal around the pistons, that's why cars usually get a little faster after a
couple thousand miles, and then deteriorate again as crap builds up inside.

I think the key to breaking in an engine is to use regular oil, not
synthetic oil for the 1st 500 miles, then changing it, and either repeating
for another 500 miles or just putting in the synthetic and going. The
problem with putting synthetic in right away is that slight scraping that
matches everything up can't occur as well...

To start with you want to run the car at different RPMs without overusing
any one range of rpms. The faster the rpm, the faster the piston is going,
the more force on the rods and the more everything stretches. So as you go
through the rpm range, the whole thing is matching up in slightly different
places as the forces increase...

I read about cars that have never been to high rpms and they get a new
owner, the piston rings start travelling slightly higher in the cylinder and
they hit a small lip that has developed from all of the low rpm running,
when it hits that lip, chunks start coming off rather than slivers...

Anyways, that was probably way more than you wanted to know but....

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makes sense huh?

George
 

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Discussion Starter #11
bradyf!

you live in Agoura Hills and haven't taken your IS through Kanan yet? trust me, you'll enjoy it!!
 

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I was an automotive machinest for years. Built many a engines and re-built many more. No worries about your RPM's the first 1000 miles. Just do not Beat the **** out of it. The above article is right on the money you need to break in any car at variable RPM's using mineral (Regular) oil then go to a synthetic. So 5 5-1/2 Thousand and even 6 RPM's is okay. they key is variation... The Carr was meant to drive! I am Breaking mine in right and Prepping it for the TRD SC! Then it will nevr see under 3 Thousand RPM's! "Every Now and Then You Need to feed Your Maching Some Speed!"
 

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Discussion Starter #13
question about the oil. Called Lexus and the IS 300 initially comes with Regular Penzoil 10-30 oil.

I'm planning to go for an oil change at 500 miles and keep the Regular for the break in period.

When should I go to synthetic? After I pass 1000 miles?
 
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