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Old 06-20-2012, 02:37 PM   #1
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Mazda rx8 rotary engine life? 100k?

I just hear than every rx8 engine was made for 100k???? Then u need to rebuild it???? Day ago I. Got mine with. 90k I'm so freak out! Now car runs awesome but oh damn! When I'm on a stop light the car just shutting off was the car of my dreams and now becoming a nightmare
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Old 06-20-2012, 03:00 PM   #2
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no engine life varies widely
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Originally Posted by Jedi54
damn it 200, we told you HANDS off Habs' daughter!

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If your student met 200, he'd probably think that the RX-8 is a Gun-Toting-Anti-Marriage-Freedom-Party Machine.
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Old 06-20-2012, 03:04 PM   #3
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probably should have done some research first.

Look for the New and Potential Owners sticky. It will open your eyes a bit.

I'm at 104k on my original 05 engine.
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Old 06-20-2012, 03:09 PM   #4
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my 8 has 75k on it but ~50k on its second engine
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Hi Mr. NSA
Originally Posted by Jedi54
damn it 200, we told you HANDS off Habs' daughter!

Quote:
Originally Posted by Gravey View Post
If your student met 200, he'd probably think that the RX-8 is a Gun-Toting-Anti-Marriage-Freedom-Party Machine.
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Old 06-20-2012, 03:15 PM   #5
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The warranty is to 100k,the engine's actual life depends on a lot of things.
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Old 06-20-2012, 03:16 PM   #6
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And some people have passed 200k without issue on the original. Much better life has been observed from the manual transmission cars though.

Paul.

PS: This thread is in the wrong section. General Automotive is not for RX-8 related items.
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Old 06-20-2012, 04:59 PM   #7
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How long are you expecting to live?
That is the same question regarding ANY engine. Maintenance, driving habits, etc are all things you can do to prolong life, but there is no guarantee...
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Old 06-20-2012, 05:19 PM   #8
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New and Potential Owners START HERE!

Quote:
The engine failure story:
Most of the engine failures were on 2004s with automatic transmissions. The 2004s in general had more issues due to the flash not adding enough oil and a few other things off the boat, and the automatics being 4-port and usually driven much more casually compounded the problem.

Compounding THAT was the original reman facility for the engine replacements did not have very good quality control, and alot of those original reman engines had improper seal clearances and other build issues that caused quite a few people to get to their 3rd or 4th engines.

MSP-16 updated the flash and improved things greatly, and happened early 2005. Mazda North America can tell you if MSP-16 was performed for any 2004 or 2005 if you give them the VIN. they also re-vamped their reman facility, and reman engines 2006+ are now usually far better than the original factory ones. So if you find a 2004, 2005, or 2006 with an engine replacement that occured late 2006 or later, don't take the engine replacement as a negative mark against the vehicle, but a positive one, as it means the engine is likely in fantastic shape, and good for quite a long time.

Plenty of 2004s were still perfectly fine.

2005s have a much reduced failure rate, 2006 further, 2007 and 2008 are relatively rare.

In 2009 they introduced further engine changes correcting several things, the most critical of which was an increase in oil pressure to RX-7 ranges (they dropped it for the 2004-2008 years for some reason), and re-introducing the center oil injector (they deleted it for the 2004-2008 RX-8s for some reason, all prior rotories had it).

A compression test should be standard before anyone buys an 8 though, just to be on the safe side. Most dealers charge $80 to $120 to do a compression test. I go more into the compression test itself in a post further down.

You might be wondering why it is that we have such a poor outlook. The problem is that there are so many different ways for an engine to fail:
- Excessive carbon buildup accelerates seal wear, causing compression loss
- Excessive carbon buildup unseats the apex seals, causing compression loss
- Excessive heat buildup warps the housings to one degree or another, preventing the apex seals from sealing, causing compression loss
- Excessive exhaust temperatures overheat the side seal springs, warping them until the side seal pops out of it's location, clips the exhaust port and shatters, throwing shrapnel through the engine (usually race motors, possible but rare in street motors)
- Fuel pump failure or high lateral G left turns with low fuel causes fuel starvation under load, creating a lean spike that causes detonation and shatters seals
- Cat failure (even more common than engine failure) causes localized heat and pressure buildup that overstresses the seals and breaks down oil viscosity, leading to various issues
- Clogged oil injection lines prevent oil from being injected, leading to excessive apex seal wear and side seal overheating, leading to compression loss and/or catastrophic failure (depending on which fails first)
- Subpar reman engine quality, starting with low compression that accelerates any other issue (reman quality has improved over the years, but bad apples are still reported)

These are just the common failure methods. There are uncommon ones, and/or freak ones, like a transmission issue snapped one guy's e-shaft somehow (probably a defective e-shaft that was too weak), or issues that are entirely owner caused, like too low octane or not keeping on top of the oil level.

Any single preventative measure you can find only addresses at best a couple of these, maybe just one method, and maybe none at all (but people think it does). And since you don't usually know how well the engine was put together in the first place, it's largely a roll of the dice on these engines.

Short answer: If possible engine failure makes you that uncomfortable and/or paranoid, then this is not the car for you. You have to accept the issues or ownership will turn into a nightmare. It still could anyway, but your mindset going in is far more important than statistics. The more prepared you are, financially and mentally, the less of a problem any of this will actually be for you.

Yes, I paint a bleak picture. However, it really isn't much worse than any other sports car. Every sports car out there has had it's share of problems. Why do we still love the RX-8 anyway? We love it because of it's ability to plaster a grin on your face. More on that later.

If the prospect of engine failure scares you, this isn't the car for you. Read the rest of that thread to open your eyes to ownership. You will either love it or hate it.


Quote:
Wait. Why would anyone in their right mind by an RX-8?
Everything above is practically screaming at you not to buy an RX-8 isn't it? Well, yes and no. If you are hearing that loud and clear, and do not place much value in things like "joy", then this isn't the car for you. Find something else. We have no interest in owners that hate the car because they purchased it with their eyes shut and then got punched in the face for wandering around the rotary world without paying attention. The RX-8 has issues, yes. But so do plenty of other cars out there. Cars that people pursue passionately despite constant problems. Pretty much the entire British sports car and roadster categories fall under this. Alpha Romeos. It doesn't take much looking to find that just about any car of passion has both sides of the passion coin.

You will become emotional about this car unless you ignore it and move elsewhere. It will happen.

And that's really all the point. We love this car. It's an emotion to us. Inherently not logical or reasonable. The people that dislike the 8 do so passionately as well. Everyone likes to come up with logical reasons to like or dislike it, but in the end it's all about how the car you drive makes you feel. If the only way it impacts you is not feeling wallet-raped every month, then you are going to bias toward cost efficient cars. For some ex-owners that hate it, the feeling is one of devastation, anger, or even betrayal. Largely, those owners bought it and either tried to make it something it's not, or bought it without any idea of what they were getting into.

For most of us, the only feeling we pursue is that what plasters that grin to our face. And everyone gets it differently.

The costs of ownership are high for us. But so are the rewards. For most of us, the rewards outweigh the costs. The reward of joy is something that we passionately pursue. Continually. It never gets old, it never becomes something less valuable. For many of us, that joy is what life is all about, and we found something that speaks to us, something that gets us there. The RX-7 community is no different really, just fewer unwitting newbies.

Definitely rule out any vehicles that don't make sense financially. But if it's between two or more cars that are all reasonably affordable to you, you will end up picking the one that makes you feel the best. Or gives you the feelings you are seeking most accurately. Too many people out there only want their car to leave them alone. They don't want anything having to do with cars, but in the end still have one because of the basic need for transportation. They want to be isolated from the road, from other cars, from other people. They want the car to be efficient so it doesn't cost them too much, they want it reliable so they don't have to pay attention to it.


To anyone that asks, I always tell them: Find a car that speaks to you. Find one you enjoy. One that puts a smile on your face. There is nothing else like it. It doesn't have to be a rotary, good handling, or even pretty. If it fits you, then it's a perfect fit. Enjoy!
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Old 06-20-2012, 06:01 PM   #9
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My car must have been a dud..
19k - first engine
47k- second engine
105k - third engine (still running good although compression numbers suggest it's getting close lol)

I'm actually kinda excited about it, I'll get to put a well built engine in it soon!
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Old 06-20-2012, 06:18 PM   #10
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Quote:
Originally Posted by RX8Soldier View Post
How long are you expecting to live?
That is the same question regarding ANY engine. Maintenance, driving habits, etc are all things you can do to prolong life, but there is no guarantee...
That's true! This comment makes me feel better!!
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Old 06-20-2012, 06:21 PM   #11
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Proper prior planning.

I am on number 4 22k, 74k, 30k, and now about 2k
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Old 06-20-2012, 11:27 PM   #12
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Still on the original engine with 37k miles and counting...
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Old 06-20-2012, 11:29 PM   #13
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Human life supposed to be 250 years, science proven fact.

but after born, there are so many VARIABLES which will lower the life expectancy, some people die in the age of 10, while some who smoke, drink, and do drugs their whole life can live till 80 something.

Everybody is just different. so does EVERYTHING else.

There are 200K+ RX-8, plenty of them.

there are some that barely made 20K miles.


but whoever told u that "oh, it's build for 100K miles" deserves a beating.

Got it ?
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Old 06-21-2012, 05:41 AM   #14
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Disclaimer.....We are talking Series 1 RX-8 or Renny I.
There is another Renny out in rotary world for RX-8.....a Renny II
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Old 06-21-2012, 06:32 AM   #15
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ASH YOU HATER !
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Old 06-21-2012, 11:05 PM   #16
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Me ha ha ha harrrrrrrrrrrrrrr...
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Old 06-21-2012, 11:26 PM   #17
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Ja, Ash you need to go back to your Comadore.

Mu haha................
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Old 06-22-2012, 10:04 PM   #18
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Quote:
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Human life supposed to be 250 years, science proven fact.
since has been wrong then for a looooong time now
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Old 06-22-2012, 10:39 PM   #19
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For every person that has had 3-4 engines, I have met many folks that have original engines that have upwards of 100k on them.

It depends on a number of factors, most notably care (using proper oil, premix, etc) and a little luck.

Cezar - What year is your RX-8?
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Old 06-23-2012, 12:09 AM   #20
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Do not listen to anyone on here.
The second you hit 100k miles, the engine self destructs and requires a rebuild.

Anyone who says they can get over 50-100k miles on an original engine is just lying to you!
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Old 06-23-2012, 07:46 AM   #21
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For every person that has had 3-4 engines, I have met many folks that have original engines that have upwards of 100k on them.

It depends on a number of factors, most notably care (using proper oil, premix, etc) and a little luck.

Cezar - What year is your RX-8?
It's a 2004 I just got the car weeks ago I took it to the shop and they gonna charge me 2000! Bucks for a complete tune up and fix some other **** on the car... I'll use it for a couple months then ill sell it I do. T have time to deal with bullshit I'll try get a jeep!
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Old 06-23-2012, 07:47 AM   #22
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[QUOTE=LifeAfterRx8;4292385]Do not listen to anyone on here.
The second you hit 100k miles, the engine self destructs and requires a rebuild.

Anyone who says they can get over 50-100k miles on an original engine is just lying to you![/QUOT

That's what a dealer told to my friend ill fix mine ill use it and when it starts to **** agai. I'll just sell it... And I do think want to hear about mazda anymore... I'll get a jeep!
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Old 06-23-2012, 09:49 AM   #23
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I only have 27k on my 2005. Use 10w-40 and premix. I'll be approaching the 8 year warranty expiration.
I'm thinking of bringing it in and spend the $ for a compression check before the expiration.

Realizing that a new engine after warranty could be ~ $5k, I have been wondering what the real statistics are of engine failures. It seems the numbers are big just reading the new engine thread, but what I haven't seen is the approximate number of engines that will go for 100k with no problems.

The RX8 is a dream to drive, smooth and handles great. Why not take a chance, take care of it and try to put another 25-50k on it, well beyond the warranty.

Thoughts?
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Old 06-23-2012, 10:25 AM   #24
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Yes, if you are nearing warranty end, get a compression test. Peace of mind if you pass, a reman replacement if you dont.

Only Mazda has true stats. Everyone else has guesses. Even if we got a 100% participation rate on the forum, the data would still be skewed heavily, not being able to account for the full history of every engine in every chassis and the appropriate fail reason for each engine, AND if a replacement was actually needed (since many early engines were replaced unnecessarily and just needed new coils). And then there is the difference between factory and reman, and the changing quality of remans.

Short story is: get a test when appropriate. Not getting a test wont change the reality of your specific engine, which is a reality that you have zero idea on until you get a test.
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Old 06-23-2012, 11:07 AM   #25
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It's a 2004 I just got the car weeks ago I took it to the shop and they gonna charge me 2000! Bucks for a complete tune up and fix some other **** on the car... I'll use it for a couple months then ill sell it I do. T have time to deal with bullshit I'll try get a jeep!
Since it's a 2004, it's out of warranty.

Like any sports car, maintenance will always be more frequent and costly. The RX is no exception.
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Old 06-23-2012, 11:07 AM
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