Shock Mazda RX-8 recalls in the USA will not affect Euro RX-8’s.

[RX-8888]

Well from what Tim said about his engine when he used synthetic oil in it, I cant say im suprised at all. I stick with the tried and tested 10w40 mineral oil it does me proud in every rotary engine I have.

You HOO!, Cheers Mate...
I could not agree more, here I use Castrol GTX-3 10w40 Mineral, and Nothing else...
Chickens will come home to roost in time....Owners from "Synthetic Land" just wont listen, the annoying thing about all this is that when something goes wrong...it\'s Mazda\'s error.

Mazda USA (MNAO) have extended warranties for ALL Rx-8 owners regardless of ownership. Engines that fail a vacuum test will have them replaced, the vacuum test will show up degradation of oil control ring O rings due to the use of synthetics as many of these engines are internally leaking engine oil, ....as we know it can only come from one area in a rotary.

Here is a Mazda Australia internal/dealer TSB form July this year...

[Ianmcurtis]

Hi RX-8888.

Sorry, but I could not resist posting your remarks from rotarynews.com

Mate you crack me up! Thats what I call \'telling them\' :rollin :Thumbs-up

BTW, any of our US cousins who read this thread, we all have some thing to learn in life. Just some more than most


Here you go.

RX-8888 post...

I have been telling you know all yanks for 2 years NOT to use synthetic oil in ANY Rotary....but, no all these SO called Rotary Gods know more than Mazda Japan.....and now you guys expect new motors for nothing.....typical.....MNAO should also be held to account for not correctly prohibiting their dealers in using or recommending synth.

I don\'t care what ANYONE SAYS...MAZDA JAPAN...I REPEAT JAPAN have NEVER recommended the use of Synthetics for everyday use in their rotaries....period.

[RX-8888]

Thanks Ian....I think....LOL

Well its true!!!....know all and bloody arrogant....then they try to blind you with all this testing and scientific drivel (DRIBBLE) as to why synthetics are so good in rotaries....you can make ANY data or discussion or theory to look favourable.

[andrewrx7]

From a chemistry point of view, rather than a generalised "synthetics degrade the rubber seals" statement, it would be very interesting to understand what exactly (i.e which component(s) of the synthetic blend) attack these rubber seals, and then have some evidence to view.  It would also be interesting to know which oils specifically, Mazda have tested and are basing their conclusions on. As ever, an interesting discussion/argument.

[A7NTY]

I just dont see why the Yanks are so desperate to get synth oil in these cars, if mineral works ok, then why the fduk try to fix something that aint broke?
The oil I use is ironically an American oil, 76 racing 10w 40 mineral oil. Its cheaper than synthetic slime too!

[iaint]

I just dont see why the Yanks are so desperate to get synth oil in these cars, if mineral works ok, then why the fduk try to fix something that aint broke?
The oil I use is ironically an American oil, 76 racing 10w 40 mineral oil. Its cheaper than synthetic slime too!

Ditto!  I can\'t see the fuss for older rotaries.

Notice the tech bulletin implies that the 8\'s o-rings are made from a different compound by not saying the 8\'s rings are degraded but that synth oils leave deposits behind.

Again, as I sadi before, maybe it\'s not an issue in Europe if owners have used good fuel with detergents in it..?

[Ricco_04]

I have always used Mineral 10w 40 - not because it\'s cheap but because it\'s what it tells you to use in the manual :yes

Shame, there are many benefits to be had from synthetics but killing your car aint one!

[HD_Paschke]

MMD current recommendation is Dexelia Ultra 5w-30!

http://www.franken-online.de/hgb/RX-8/Mazda-Oel.pdf

[BlueAdept]

In an RX8... although the RX7\'s recommend a thicker grade, leading to a debate over the reason why the RX8 is a thinner grade, (very thin in the US... 5w20!)... it may be an economy thing, and hence there is a school of thought that moving to the 10w40 would be best...   my personal opinion is that since the car is OK in the US running on 5w20, I will stick with the grade they recommend (5w30) until the engine has done 80-100K miles, then move to 10w40 to counter any wear in the engine... I\'m currently using a Semi-Synth which is not the Mazda Dexelia veriety, and I don\'t suppose I will change that... but then my warantee has expired, and it is a mineral oil that is made in the same way as the Dexelia...  Of course I am biased because I have a drum of it to use...