Iv herd people say it is and other people say its not... I have a 2000 gsr motor built for boost, JE pistons, eagle rods, 9:1 Comp ratio (bottom end build). The motor had 60k when it was built and now has prolly around 66k... Its making around 400whp as of now and its my daily driver in the summer time...

I do a lot of driving back and fourth to school putting a lot of miles on it each week. I keep up with my oil changes, changing it super frequently every 1k miles just to be safe cuz i drive so much. At times i put nearly 1000 miles on it a week at best...

Some people say as long as im not always boosting and romping on it everywhere i go i should be fine...Then other people tell me motors built for high comp or boost should not be either daily driven, or if they are daily driven then they should be very frequently because there really only good for 40k miles or so.

WHAT SHOULD I BELIEVE?? SHOULD I BE OK??
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If your not blasting to 9k everyday, and your maintaining the vehicle like you should (sounds like you are), i don't see why it wouldn't last. If you allow the engine to warm up before driving and let it idle to cool down when you park it (for the turbo) id think it would be ok. If it had the bottom end rebuilt correctly, it should be like a new block. If your really paranoid, do a leak down or compression test every now and then to see how consistent your numbers are. Take a base line leak down or compression test now, as im sure the motor has been broken in, and monitor it. That way you will get an indication of anything drastic in the future. Id have to say as long as your not constantly in boost......then your fine. BTW 60k is not a boat load of miles. Also watch your oil and water temps....not sure if you have gauges, but if they are not super high....once again you will be fine. Usually driving long distances doesn't deteriorate the motor as fast because your getting a good flow or air through the engine bay to keep things at a decent temperature....... its the stop and go that wears it out....keep in mind this is all relative. If your not in boost for long periods of time youll be fine

 

isn't this a double post? the problem with the 18c isn't really normal wear and tear related in high hp applications. it's cylinder walk. lots of rpm will distort the sleeves over time. boost just speeds up the process. this is why people sleeve a block or buy the dart block if they want a boosted engine to live a long time.

 

if the block was built right and dont be the sh*t out of it every day then i don't see why it couldn't last for a long long time. just gotta keep up on the maintenance

 

block built right is the key word there

 

and i'm sure the oil companies are loving the money you're putting in their pockets

1K is way too soon dude, you're seriously pissing money away

and why is this in the NA forum?

 

I can't comment on higher mileage stock sleeved built motors, but I have a Dart block with forged internals and it has about 50k miles. Mine was beaten on everyday though, and the only issue I had was my titanium retainers wearing out from all the RPM's. The retainers are paper thin now and are due for replacement. Everything else is perfect on the motor, and oil was changed every 2500-2800 miles.

Oil change intervals depend on how you drove the car and how it was tuned. If the engine has huge injectors and running richer (or rich spots) are inevitable, it will break down the oil sooner from fuel dilution. If the car is perfectly tuned with proper O2 closed loop, no rich spots, small injectors and runs well, you can follow regular oil change intervals if the car was driven regularly. On the other hand, I change my oil almost right away after a hard weekend at the track.