RX8 Reliability

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DQuaN

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So I'm always going through AutoTrader and the like, thinking about what I might like for a next car. At the moment, I'm really leaning towards an RX8. The problem is I hear conflicting reports about how reliable it is from both ends of the scale. Some say it will break down on the way home from the dealer and others say it's bulletproof. I understand that there was a fix made for all post 2005(ish) models and they're the ones to go for. Can anyone give me more info?

Ta

Dunc
 
Should be reliable because it's a Japanese car but it depreciates like hell!
 
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Means I can get one cheap! :)
 
I've not heard anything drastically bad about them, but they don't like short journeys, definitely don't like being started and stopped in quick succession (i.e. to move it on a driveway or something) and it's always wise to keep an eye on oil levels.

Other than that, it's a Mazda so it's unlikely to go horribly wrong if it's looked after.
 
I've heard about the oil levels. Why is it bad for short journeys or starting and stopping?
 
I've heard about the oil levels. Why is it bad for short journeys or starting and stopping?

The oil should be "in level" (like we call it here) so that the oil pressure is always at its finest. Its my guess... and for what i know from a friend that has an RX7, the wankel engines last around 100.000 km, but possibly they changed all that about the reliability of the engine (new generation). A distant aunt of mine has one RX8, but i dont talk to her in ages lol.
 
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I've heard about the oil levels. Why is it bad for short journeys or starting and stopping?

It's a flooding problem. On cold starts the engine uses more fuel, and if you turn the engine off quickly after starting any excess fuel sits at the bottom of the chamber. This can thin the oil which leads to poor compression, meaning difficult starting. The fuel can also coat the spark plugs, which doesn't help.

Most people seem to recommend switching off the engine no sooner than it takes for the temperature to sit at normal on the gauge.

Short journeys, same deal. As long as the engine has had time to warm up properly it should be fine. The other issue I suppose with short journeys is that if you're starting from cold all the time and only doing short distances, fuel economy will be even more atrocious than normal, so you'd need deep pockets.

Daan has an RX8 - I'd recommend asking him what they're like to live with.

Edit: Also, damn you. You've got me looking at RX8s now...
 
He finally got rid of the Pug then! I'll ask thanks. Also I live a 5-10min drive to work so I guess that wouldn't be ideal!
 
... and for what i know from a friend that has an RX7, the wankel engines last around 100.000 km, but possibly they changed all that about the reliability of the engine (new generation).

Not true. I've seen naturally aspirated Wankel's go well past 200k miles. Just take care of it correctly, unlike most people.


Means I can get one cheap! :)
Edit: Also, damn you. You've got me looking at RX8s now...

I've been looking too, although the cheap ones around here seem to be automatics. :(
 
Wankels tend to be hard on their seals and oil. It's not so much that they break down and suffer catastrophic failures often, more that they wear through parts quickly. Keep it up to date and you'll rarely have issues.
 
Not true. I've seen naturally aspirated Wankel's go well past 200k miles. Just take care of it correctly, unlike most people.

His RX7 is not NA:p. You may be right though.
 
From what I've heard, and don't hold me to it as I may be wrong entirely, Mazda's are somewhat of a pain to maintain compared to other brands.
 
From what I've heard, and don't hold me to it as I may be wrong entirely, Mazda's are somewhat of a pain to maintain compared to other brands.

Wrong! :p
 
I'm not a fan of the rotary but looking at all these japanese car mags, they sure know how to make the rx8 look bad ass over there.
 
DQuaN
Means I can get one cheap! :)

That means your gunna have to sell it cheap.. But it should be even cheaper (Probably) because Mazda have stopped producing them...

Rotary engine in a road car = Dead
20MPG for a 1.3 = Dead

So yeah.. If id to buy one i'd stay around the £3-4K area (Which i.wont because i'd just buy a Type R :D)
 
A relatively common problem with pre-facelift RX8s is cold-start flooding. This is one thing you must avoid on pre-facelifted cars: Do not start the engine cold, move the car (say, from the garage to the driveway), and turn it off before the temperature begins to register on the temperature gauge. If you turn it off cold it will probably flood and you'll probably be headed to a dealer to get it de-flooded and replace the spark plugs. This was quite common and terribly inconvenient in my opinion.

The Renesis was designed by an American team in California, not the crazy guys in Japan. These people had never designed a rotary before. None of Mada's previous Japanese-designed rotaries had ever had problems like this (mine can be started and shut down as much as you want just like a piston engine). If you get a facelifted RX8, this problem will have been fixed.

As for oil changes, do them regularly and often. You should get into a routine of using the trip computer so you never go over 3000 miles between changes. You should check the oil level periodically, but expect to be adding about a quart around the halfway point.

I've read some things about odd ignition problems and whatnot, but hey, every old car eventually develops problems that needs to be fixed. I've just described the very common nuances about rotaries and RX8s in particular that you need to keep an eye on. As long as you keep a rotary's oil clean and full, you can expect at least 100,000 miles of buttery smooth, curious sounding operation out of it.

Oh, and never start and stop a prefacelifted RX8!
 
Rotary engine in a road car = Dead On hiatus

Fixed.

Mazda has stated they are not killing the rotary engine. I would expect to see a revived RX-7 or something else rotary powered in the next 3-5 years. (or sooner)
 
I've had one for about a year and a half now from brand new and had no problems at all to date (touch wood!!!). You just need to make sure you keep the oil topped up regularly and don't over-rev until the engine has warmed up. Other than that it's fine, never even experienced cold start flooding despite driving it short distances before re-starting.

For fun factor I can definitely reccomend!!
 
They've been working on a Renesis replacement for quite a while now, so most likely sooner.
 
I completely declare shenanigans on this post!!!

SHENANIGANS I TELL YOU!!!

I want an Rx8 reallllly bad and this post just made it worse! Damn you all! lol :lol: :p
 
From what I've heard, and don't hold me to it as I may be wrong entirely, Mazda's are somewhat of a pain to maintain compared to other brands.

Mazda rubber sucks. The rubber in the suspension bushings, the rubber in the anti-roll bar endlinks, the rubber in the shifter bushings, the rubber in Mazdaspeed3 engine mounts that keep failing entirely... :lol: but other than that, it's no better or worse than most other Japanese manufacturers. My Mazda goes through synchros like clutches... but I ride it hard... and my Nissan before that ate gears, instead.

The worst I can say for my car is the electrical parts involved with keeping a stable idle (TPS/IACV/ETC) aren't all that great, but then, they're made by Mitsubishi. :lol: Hell, a lot of Japanese cars share parts and electronics suppliers (Toyota uses the same MAF as mine... only calibrated differently), so if something is likely to go wrong in one car, it'll go wrong in competing cars, too. (And Nissans and Mitsus, using the exact same electronics, have the same idle issues as they get old) My AC lasted longer than in my Nissan. My shocks lasted longer than in any other car I've had (helps that Mazda, at the time, realized the value of proper spring-shock matching... they went backwards with the 3...), and the car is just as fun to drive several years later.

---

Naturally aspirated rotaries are supposed to be dead reliable. It's only the twin-turbos that tended to eat themselves to death on a regular basis.
 
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Nothing wrong with Mazda quality...except for the rotary engine. My past two cars have been Mazdas, a 2003 Protege5 drove to 100k with only minor problems. ABS sensors replaced under warranty and the P/S pump broke under the extended warranty. Currently I have a 2006 Mazdaspeed6 with 80k so far. Gas cap sensor replaced under warranty and no other issues.

Now I have several friends with RX-8s (I'm part of a Mazda club). One has had the engine replaced 3 times under the factory warranty. Another had his replaced once under the factory warranty. Two have been pretty reliable...but gas mileage is atrocious...and you have to be real careful about flooding the engine, letting it warm up properly, etc.
 
My engine's the same as in the P5.

Would have to say, though, that part of my idling issues are due to having an intake, an exhaust and racing cams so extreme that I have hardly any vacuum at idle. :lol:
 
Mazda rubber sucks. The rubber in the suspension bushings, the rubber in the anti-roll bar endlinks, the rubber in the shifter bushings, the rubber in Mazdaspeed3 engine mounts that keep failing entirely...

The valve cover gaskets on the 2.3s, the engine mounts in general, etc etc. :lol:



As for the RX-8 itself, I dunno. The people I've known with them haven't had too many problems with them (at least not enough to get rid of them) aside from fuel economy, which changes basically none based off how much your right foot weighs. It's just bad regardless. By bad, I mean worse than the NA FCs ever were for most of them it seems... Ask Keef if he gets "good" gas mileage.
 
What hfs and Dgiant said.

Also what Keef said, with a proviso about the oil. Oil should be checked every other petrol fill up and may need topped up. Oil consumption will happen but varies according to how it's driven. If you rev it up to the 9400 red line constantly, you'll need to top up the oil every other fill up. If you just rev it all the way up once or twice per trip, then you won't need to top it up as often.

It is a great car, if you get a good one. They are cheap to buy, but watch out for the extras like petrol, oil and tax. Budget for about 21mpg average and, if you can cope with that, go for it.



There's not much difference between the 192bhp and the 231bhp but the 231 is slightly quicker, as you would expect, but there isn't much of a difference in fuel consumption. Trim levels are pretty much identical and the only major differences are that the 231bhp one has 6 speed gearbox, higher rev limit, headlamp washers and Xenon headlamps.

Your journey is a bit short. It will have warmed up in that time so there's no worries about flooding it. It may not like it long term though as it does need to be revved at least once per trip and, if you can't rev it up to the beep on the way to work, you should take it out at the evenings/weekends and give it a thrash to keep it functioning properly. Once warmed up, it's practically a necessity to rev it to the 9400 red line regularly.

If you decide to go and look for one, the thing you must do is to drive it, or get the owner to drive it, until warm. Stop it and leave it for 2-3 minutes, then try to start it again. If it doesn't, or if it struggles to start, walk away. That's the first indictaion that the engine is on it's way out. If it starts the same as it did when cold, then that's a sign of a good engine.

You could join the RX8 owner's club forums, but you do get a fair few horror stories there, so don't believe that every RX8 is a unreliable money pit. I've had mine a year, done 11,000 miles and the engine didn't need anything done other than an oil and filter change at it's last service. If the rotary does go, £2500-£3000 will get a you a good, guaranteed and warranteed, rebuild. Bit expensive, but not the end of the world.

So to sum up. A properly looked after RX8 is no more unreliable than any other sports car. It may not be ideal for you as your commute is a bit short, but get it out on the open road and it's a great handling, fun car.

Just ask if you want any other info.
 
Fixed.

Mazda has stated they are not killing the rotary engine. I would expect to see a revived RX-7 or something else rotary powered in the next 3-5 years. (or sooner)

Yeah.. But remember the European emission regulations are getting tougher and tougher each year :( And those.. how can we say? "People" even killed the Civic Type R? o.O Strange.. But I doubt there will be one - but Mazda (probably) are going to make a Concept - Just to keep customers happy..
 
Yeah.. But remember the European emission regulations are getting tougher and tougher each year
And the new engine has been being designed with that in mind.
 
And the new engine has been being designed with that in mind.

Quite. They wouldn't be building another only for it to fail emissions tests...
 
Quite. They wouldn't be building another only for it to fail emissions tests...

True.. They'll just produce it and.. BAMM next year, cars have to be electric and NO emmisions are aloud out..
 
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