Would it harm anything to use the RP race oil? Or, is it just not necessary unless you are really running the 8 hard, as in an road race or endurance race?

 

You know how you take a crap sometimes, but no matter how much you flush, that one little chunk keeps floating back up to the top? Yeah, that's like synthetic oil threads.

I think we've got a plant. Possibly a Quaker State employee.

 

Read several threads on the sythetic/mineral oil debate. Thought I would add this to chew on.

I have been putting Castrol Syntec 5W-20 in my 2004 RX-8 ever since the break-in oil was changed. I would bring my own oil to the Mazda dealer and they changed it without question... until today, that is.

While in for my 39K change, the mechanic happened to mention that synthetic was not recommended. I told them that they had been putting it in for the last 2 years and there has never been a problem. They went ahead and changed it but put a little note on my service invoice stating they had warned me.

I find this very strange, but I have no fears about the use of sythetic in my 8. Might try Royal Purple in the future. Thanks for all the great posts.

 

Forgive me if I'm reposting something that was said earlier in this particular thread or elsewhere (didn't feel like readin thru the entire thing...), but the DVD actually says that you can use fully synthetic oil but since its long term effects are unknown: it's not recommended.

Does this mean that it's bad for the car? Does it mean that it will damage the car?

The answer to both of these questions (from decifering what was said in the dvd) is that in the short term it will probably have little or no detramental (sp??) effects, but they don't know what it will do with prolonged use...

Thus, I say try it if you'd like and after 100K miles, let us know what happens...

 

please read this thread.

https://www.rx8club.com/series-i-tech-garage-22/cumulative-synthetic-oil-discussion-52856/

and this thread.

https://www.rx8club.com/showthread.php?t=93498

this is getting old so fast!!!

beers

 

How many books worth of pages am I going to have to write before someone finally tries to come back against synthetics with an actual fact based argument? I'm sick and tired of seeing the nay sayers only proof being "Mazda says..." or "Mazda recommends....". Prove that synthetics are harmful to a rotary engine. Don't cheat and go back 30 years to when olders inferior seals weren't compatible with the synthetics of the day. Stay current. I've written page after page of info that tells you what oils are made of and why they are like they are. I've repeatedly compared the materials in a piston engine with the materials in a rotary engine. Again no arguments to say why one is compatible when arranged into one type of engine but not into another.

Here's my challenge. I want anyone with the ***** to do it to come on here with actual fact based proof that synthetic oils are harmful to a rotary engine. Prove it. I prove my side everyday. I use the stuff and have for a long time. I've got over 100,000 miles of synthetic use in a rotary. No more "quotes" from a company who reverses their position on the topic more than our country reverses it's political preference. I want actual facts right down to what oils are made of. Rotor Rocket, I'm calling you out on this one. Prove me wrong. I'll wait. I've been waiting for several years now. I've got time. Something tells me you are going to keep me waiting. Who's "pissing in the wind" now professor?

 

Why in gods name people are still arguing this point is beyond me. I have all the literature and the only synthetic warning, if you want to call that, was on Mazda's website, which said it doesn't recommend synthetic oil for ANY of its cars, it does'nt single ours out.

More importantly, I and several others had a discussion with the Head of Mazda's Rotary Engine Program at Sevenstock last year about synthetic oil, not only did he have no issue with synthetics, he likes royal purple. There is no higher source or person in the WORLD to go to......period. Thats not opinion, hearsay, rumor or myth. There is not better source to go to, Mazda's CEO would direct you to him. Hows that for a Mazda source?

I have no problem if you want to run dyno oil in your car, pick a good one and change it often. But I'm not going let people here talk out of their *** about stuff they have no business pontificating about. I'm tired of the bullshit beingspread about synthetics, I have had the privleage to speak with the greatest Rotary Engine minds on planet earth, and none, not one, have an issue with using a good quality synthetic.

 

+1 Vote for Royal Purple.

Ive put 20+ thousand miles with synthetics in my RX8 and it's purring like a woman after awesome sex

To change the topic to something more enjoyable then this damn dino vs. synthetic crap... I wish this weird raincloud in NE fort worth would go away so i can go outside and do my throttle body bypass mod on my 8 :-D

oh yeah brillo! whats up :-)

 

ok ive been runnin synthetic since about 15000 miles, i got my first oil change done n then with the second oil change i ran in castrol syntec...........becuz i didnt wanna totally go from conventional to straight synthetic, i dont think that would be good on the motor, so i introduced it in.............then ran it from 6000...........to 15,000, was running on castrol full synthetic till i got hired on at ez lube, now have access to free mobil 1 synthetic motor oil.........so i put in the mobil synthetic 5w-30.........n its been runnin good so far......... i would say thumbs up for synthetic.........n if u people r hesitant on it for waranty purposes.........go look in ur manual where it says when u get a flat tire.........it says only bring ur car to an authorized mazda dealer, does that mean all tire shops are bad???? if u think thats true, trade ur car in get ur money back n ride a bicycle around town.........

 

Yet the actual owners manual says nothing about not using sync. oil. The manual is the the last word from Mazda and it dose not say not to use synthetic. Your source are not holding up.

 

I'm still waiting for him to respond to my challenge to give me actual proof it's harmful. I have a hunch I never will receive an intelligent response to it. Never have so far. Why should I expect it now? Since I have talked to the main rotary engine guy at Mazda, you might say I've actually talked to the "horse's mouth". "Where's the beef" now? Who writes disclaimers anyways? Is it the engineers or the lawyers? Could it be that we could get 2 different answers because of this? Remember we have had them reverse their position on the issue a couple of times. Hmmm.... No way. We all know lawyers are actually engineers who are honest!

 

I just dont get why some people want someone else to stop using Synth. Oil in their rotaries.

You can use your Dyno Juice, no problem.

but hey, I believe in Synthentic oil, it has been proven to last longer, withstand higher heat, I've been using it since my first 1K miles oil change, no problems and engine is getting better MPG everyday. So its just better for me. Leave me alone please. and just be happy with your "Mazda does not recommended" thing.

Oh, also, to all those who believe in "Mazda's do not recommended" people. Please do everything Mazda recommends. Oh yes, you know what Im talking about.

My 0.02

Thank you for reading. :-)

 

Who is your "main rotary engine guy"? Mind telling us his name?

 

I recommend you quit your argument right now. Your're going to lose because you probably know nothing. Just stop it okay!

 

You and the rest of the "pro-synthetics for rotaries" can continue to revel in your ignorance. I'm tired of arguing with those who don't "get it". Synthetics are superior in general to dino oil, but, there are issues that are worth taking into account that should cause one to think twice about using synth in rotaries, inc. the current Renesis.

If you really[B] talked to the "man" at Mazda, you would understand Mazda's reluctance to promote the use of synth oil. That case has been made many times here. You can do a search if you want to. And no, it won't affect your warranty. It just might decrease the performance of your engine over time, depending on the brand. It would involve testing everything out there in synthetics, and, the new formulations as they come to market. Rather than specify which brands can cause a problem, Mazda plays it safe by making the blanket statement not to use synthetics. Do the search and you'll know what specifically Mazda is concerned about.

I don't give a crap what you put in your cars; you're not breaking any laws, but I got better things to do with my time than continue to make Mazda's case re synthetic oil.

Why don't you all call your "man" at Mazda and ask him to create a letter on MNAO stationary with his signature and department, saying that synth is your choice to use, and, will cause no loss of performance. That, I would like to see posted here.

In the meantime, I'll stick with my contacts at MNAO.

 

good to know

 

We use Synthetic Oil and our engine last longer = We're ignorance

Your contacts? Where is your contacts besides some flyers ? How about this, why dont you ask someone at Mazda to come out, and actually say they're "against" the use of any Synth Oil, instead of "non recommended"

Oh and like I said, you have to show us prove that Synth. oil can actually destory Rotary. IF you cant, please shut up and stop spreading myth. Do I have prove? Well, is the Mazda Racing team more than enough ?

What makes Dino oil so superior for the rotary THAN Synth oil, other than the problems from 20 years ago. oh please dont google it, I want to know YOUR opinion.

Many Rotary owners, Turbo or not. use Synthentic Oil with great results. Some even have 200K engines. what does that mean ? Synthentic oils suck ? You can say that he might get 200K engine with Dino oil too. but hey, people have 200K engines WITH synthentic Oil, thats all we need to know. and its a fact, instead of "non-recommended" kind of crap.

Also, did you actually perform ALL kinds of service at a Mazda Dealer? Because thats what Mazda Recommends as well. Warranty or not.



Thanks

 

Yo Lurch,

What's the source of that quote? And did they mention which weight synthetic they use? 5W-20? 5W-30? ...?

 

Idemitsu Oil is VERY proud of their Mazda triumphs - their oil is all synthetic, including the premix that was used.

787B Oil.

Idemitsu.

S

 

What are the seals made from in the Renesis? Viton or what? Tell me what they are, and then if I can get a list of what chemicals are in say, Royal Purple, then I can look on a compatability chart at work and prove 100% whether synthetics eat into the seals or whatever. (I had a dealer "expert" on rotaries try and tell me that the synthetics eat up apex seals, ha ha wtf, how is synthetic oil going to eat up metal seals?)

Actually come to think of it, the only times I've heard "synthetics = bad" is from the dealership. Not Mazda North America. Nothing on official stationary. Just salesmen and some guys in the service department. I wonder if they're just repeating something they trained their service guys to say 20 years ago, and Mazda never bothered to spend the time/effort on a campaign to re-educate them.

 

I was one of the people who started this crap, back in the '70s....

Bought some of the wonderful/new/space-age/Jetsons Mobil1 synthetic (as used by NASA!) and put it in my 1972 RX-3.

Within a couple of weeks the engine was burning its antifreeze at an alarming rate, clouds of white smoke and constant overheating.

Mazda changed the engine, and took it apart to find the problem - housing seals where no longer "O" rings, more like Jello.

Soon after, Mazda started notifying owners that synthetic was NOT to be used.

I think they went to a different seal material in the late 1970s, after which it became just "not recommended" like most other manufacturers.

Sorry.

S

 

Just a few quick questions. Why do most of you chose synthetic? Do you feel more performance? Will your engine last longer? do we really know for sure? At the rate we using our petroleum resources, we will have no choice but to use synthetics in the future. The big argument is if the rotary engine is supposed to burn oil, does synthetic oil combust at the same rate as dyno oil. If it doesnt, will this harm the engine? This would require alot of research. Run two engines, one with synthetic and one with dyno for 50k miles, same oil change intervals. Tear them apart and inspect. Anyone game?

 

I'm back...

Well now, it seems that some of you are starting to think constructively about this issue. Now it's time to put the nail in the coffin. But first, figure out what the potential problem is with synthetic oil.

Hint: It ain't the seals anymore for the last 10-15 years at this point. It has to do with the Renesis engine used in racing cars such as the single seaters that tour the road course circuits. (Can someone refresh my memory as to the name of these cars? Mazda sponsers these cars.)

The engines are virtually identical to the ones used in the RX-8, with some deletion of the exhaust/anti-pollution system. Come back to me with the right answer and I'll tell you what Mazda's concern is re synth oil in street RX-8s. Then, we can know the facts, make our decisions and get some sleep and get on with more important stuff like when and what will become of our beloved cars down the road from the 2007 cars.

 

mazda star series. running motec for fuel control...

i think in all the races last year i saw one engine problem.. what is your point... why dont you post your info on mazda doesnt recomend from someone from mazda usa letterhead????

not you silly flyer... or maybe post any thing usefull anywhere on this forum..

beers

 

btw,

just to help the others these are your wounderful threads you have started.


3 Attachment(s) Mazda does not recommend synthetic oil for RX-8 ( Multi-page thread 1 2 3 4 )
Rotor Rocket

04-30-2006 02:40 AM
by staticlag Go to last post
49 1,284 The Tech Garage
You have 7 post(s) in this thread, last 04-25-2006
3 Attachment(s) I received a pamphlet from Mazda U.S. Read info re Synthetic oil usage ( Multi-page thread 1 2 )
Rotor Rocket

notice anything in common????? do you???

if you have something other than the same crap you started before man up...

beers