is it by the way true that if you put 5w 30 instead of the 5w 20 oil in your car your car will hold for 150,000+ miles and if you drive the 5w 20 you have to fix your car every 30,000 miles? in the rx-8

 

no

 

you have to put the oil ON the car for it to last 150,000+ miles

 

Mazda RX 8's Engine Failure Problem
Old timer New User | Posts: 1 | Joined: 2/25/2007 Posted On: 02/25/200701:11 PM
The following is my conclusion from reading the discussions about RX 8's rotary engine failure problems from other RX 8 forums on the Internet and from currently owning a 2005 RX 8. You can form your own conclusions The only thing wrong with Mazda RX 8's sold in the USA is that Mazda USA requires the use of a very thin light weight 5W-20 oil that breaks down and cannot protect the rotary engine and catalytic converter from early failure, because the normally very hot running engine runs very, very hot especially in slow traffic and long drives in warm weather. Every city in the USA has slow traffic jams and warm weather so what good is the RX 8 using this oil in the USA. Every where else in the World (except in the USA) Mazda requires in the RX 8 Owners Manual the use of 5W-30 oil to adequately protect the very same hot running rotary engine that is in RX 8's in the USA. The heavier oil protects the engine and oil seals from failure and prevents oil blow by from ruining the catalytic converter, for over 200,000+ miles, as documented in many forums on the web. For example, printed on Castrol bottles of 5W-20 weight synthetic oil, says "use only in cars used for short trips" and another 5W-20 Castrol bottle of non synthetic oil says "use only if required by the car manufacture". Other wise, Castrol ,who sets the standard for excellent oil, does not recommend the use of 5W-20 oil unless directed to by the car manufacture or for short trips. In addition, Castrol can be objective with out any conflicts of interest about which oil weight not to use to protect an engine, because it does not manufacture cars nor have any vested interests or concerns about meeting EPA miles per gallon requirements to avoid fines. In the USA the RX 8 engines using the very light 5W-20 weight oil last maybe for around 30,000 miles before needing to be rebuilt a number of times before and after expiration of the warranty. This is probably why Mazda now only warrants the car for 3 years or 36,000 miles instead of the prior warranty of 5 years or 50,000 miles. This is also clearly documented in many RX 8 owner web sites. However, in the USA Mazda requires the use of inadequate light weight 5W-20 oil in order for Mazda to meet EPA miles per gallon (MPG) gas consumption requirements. This light weight oil shortens the life of this normally very hot running rotary motor to around 30,000 miles, at the expense of the consumer who needs to keep spending lots of money and time to keep it running. The owners must keep them running because no dealership wants to take the car in on trade or offer a fair amount on trade due to the now widely known problems Mazda has caused to happen to the RX 8 New buyers should consider not buying Mazda RX 8 cars until Mazda permits USA owners to also use non synthetic 5W-30 oil in their rotary engine, without loosing their warranty, as Mazda recommends throughout the rest of the World. Mazda could still put in the USA, RX 8 owners manual, recommendations to use 5W-20 oil to satisfy EPA , but not cancel the warranty of those who wisely choose to use non synthetic 5W-30 oil as recommended by Mazda, thorough out the rest of the World. A class action law suit will straighten out Mazda and increase the life of our cars and make the car worth a proper amount when traded. RX 8 owners in the USA did not buy their RX 8 with full disclosure by the Mazda dealership that the car motor and catalytic would wear out much, much quicker than other cars, due to Mazda oil requirements in the USA nor how Mazda treats the USA RX 8 customer. My Mazda dealership before purchase told me the RX 8 motor would last over 200,000+ miles because it was the nature of rotary engines. With the first oil change though they also told me they would not put 5W-30 weight oil in my RX 8 because according to them it would damage the engine (which is a lie) and would void the warranty, according to Mazda USA. Well it is common knowledge now with the USA Mazda required use of 5W-20 oil that the engine will not last 200,000 miles as advertised and more like it the motor will only last around 30,000 miles before needing to be rebuilt again and again etc. Every RX 8 owner in the USA had better individually or join together to fight the Mazda lies about the weight of oil to use in their RX 8 or their motor's will have a very short life with no one to blame in the long run except for your own lack of sticking up for yourself and what you know is right.

THIS IS WRITTEN ON THE INTERNET

 

I see... so if it's on the internet, then it is true.

 

i've noticed that since switching from canola to olive oil my skin is much softer.

 

haha no that's why i asked here so what is max?? how long you can drive with the rx-8

 

about 20 miles. although i heard one guy driving 40 miles but he was never seen again to prove it so i don't buy it.

 

step 1) remove cat
step 2) tune without cat
step 3) go online
step 4) read this bull sh** and not worry about a thing
step 5) grab beer and relax



I see idiots every day. The authors presumptions abou engine repair are funny though...

 

You're going to teach Mazda a lesson, are you?

 

you mean you read through that whole block of letters that pretended to be a paragraph?

 

That part just jumped out at me. Literally. Fell on the floor, walked over and kicked me in the nuts.

 

I cant believe I read that whole message. Damn ppl use some periods or commas or something.

Well, whoever that dude were, he has a point tho.

rx8club.com is mostly a North America forum, Cant speak for the whole world, but from what I've read so far (2+ years and counting), NA market has the highest failure rate, and we're the only market who use 5w20. That should tell us something, right ?

I use 5w30 since maybe 8K miles, now 31.5K miles still running strong.

 

I don't think it's telling you that 5w20 is causing engine failure.
They are only assumptions...

 

The sky is falling ,,,the sky is falling!

 

i've used 5w20 for 20k miles, no issues at all, might depend on climate but i doubt i'm gonna need a new engine soon... if i do, warranty... and if it's not warranty that's a damn good excuse to the wife for a 20b :p

 

No More Oil Threads!!!!!!!

 

Yes... no more please!!

 

Of course—why didn't I realize it before!! Mazda has been recommending a grade of oil that will ruin all of our engines in 30K miles, so that they can then replace them under warranty. Not to mention alienate tens of thousands of North American buyers, who will never want to own another Mazda again.

Makes perfect business sense.

 

has it been two months again.. time flys..


beers

 

But the question still remains. Why does Mazda recommend 5W-20 in North America while recommending 5W-30 for the rest of the planet? Answer: Mazda's parent, Ford, makes them do it for mileage purposes. Duability is only a secondary consideration.

 

we already know 5w30 is fine for the engine, so use it.

 

Prove it.

 

No proof other than Ford's own statement that talks only about mileage - with the disclaimer that some of Ford's engines cannot use 5W-20. If 5W-20 was that great, wouldn't ALL their engines be good on it? Ford classifies the RX-8 as a "light duty" vehicle which, in their estimation, means it can get away with using the lighter oil.

http://media.ford.com/newsroom/featu...?release=23040

Beyond Gasoline - High Mileage Oil
Who ever thought that engine oil could increase fuel mileage? If all U.S. consumers followed their owner's manual oil recommendations, about a half a billion gallons of gasoline could be saved each year. On top of that, starting in 2001, Ford led the industry by recommending the use of SAE 5W-20 motor oils in all light duty vehicles with the exception of 4.0-liter engines that use SAE 5W-30 oil.

 

I'd like to refer you back to this post.....think about it.

And as for why they don't recommend Xw-30 weight in ALL their motors...well....ALL their motors are not the same. ALL their motors are not designed with the same applications in mind.

If you honestly think Fords reccomendations for 5w-20 oil is only for fuel mileage issues and they are disregarding reliability and longevity I am seriously going to disagree with you. If you happen to spot any FORD comercial on tv they generally have one of the tag lines "Built FORD tuff" or "longest lasting blah blah blah". That has been one of their major selling points for decades. If you think they are going to give that up for the very slight increase in MPG you may or may not see from using 20weight instead of 30 weight oil you are fooling yourself.

so again, prove it.