It's a little more than that. There will be 2 extra oil injectors to better lubricate the apex seals. The oil cooling system seems better designed as well and there may be an improvement to the oil pump. The extra injectors are placed similarly as what can be seen on the all new engine (16X), hence the confusion, but they are improvements that will also be implemented on the 2009 1.3L Renesis as well. See here: https://www.rx8club.com/rx-8-discussion-3/true-2009-oil-filter-relocated-additional-oil-injectors-138043/

It's impossible to predict how much greater longevity these improvements will provide the 2009 engines or how many fewer engine problems, but presumably Mazda is fixing what they feel to be a problem. For me, the longevity issue is important, because I like to keep a car as long as I can--hence my 1993 daily driver Miata!

 

You can believe your theory and go on your merry way, or you can research the topic and find out that synthetic oil burns cleaner than conventional and come to the correct conclusion.

The desire to use conventional oil over synthetic is similar to touting the advantages of using a Zinc carbon battery over Alkaline. It's cheaper, but that's virtually the only positive.

 

Such hostilities in the oil debates....it's usually why I skip even reading these threads.

I could research it, but conventionals have gotten many a well-maintained and nicely-driven car to 200,000 miles or more. The question remains that which is better for THESE cars...may never be answered. NOW I'll go on my merry way.

 

You made an incorrect statement. There's only so many ways to say "You're wrong."

Nevermind saying you're wrong, nicely.

 

I am happy you used the correct "you're" though...beers?



I'm just Mr. Pessimism, you know? I know the oil companies are after my money, that's all. I probably don't keep cars long enough for it to even matter anyways!

 

hehe. BTW, no hostility intended on my part. Just typing quickly between showers and getting dressed before going to work.

 

I hear ya! I'm up all night alone reading threads because I work nights, and when I'm off it kind of sucks. I'm about to hit the bed!

JP

 

4 stroke oil aren't designed to burn. 2 stroke oils are. Synthetic 4 stroke oils just happen to burn cleaner than conventional oil. It's a myth that they don't.

 

Probably so. I'm not basing by statement on any info or anything...just one of those weird things that you would think...just seems like petroleum-based would burn easier/better. Not that I fully believe that anyways...

 

Keep in mind all oils have a flash point. Synthetics tend to be higher, and I don't think any Automotive oil has a flashpoint higher the 600 Degrees Fahrenheit, so with combustion 900+, The biggest concern is 'ash', Which ester based synthetics tend to have a low if not near to none...

That aside, and the expectation that all owners maintain their oil regularly (3k miles) or by Mazda's recommendation of every 6k (Yeah wtf..) on 5w20.

The sources or methods of resolving heat spots come up. So with oil being left out of the equation with 'my' assumpetion they've done benchmark tests with mineral oil. What other methods could they have 'changed' to manage this? (PCM Reflash to OMP settings)... because there's no way in CAFE (HECK) that Ford is going to sway and bump their 'recommendation' to 5w30, and get a 1-2mpg rating lose...


Now here's an odd question, Will this revision be world wide or just USA? Are japanese owners & UK Owners experiencing the same thing?

 

I thought it was more corner seal prob than apex? And the temps mention in the combustion chamber--is that true for all the areas that seals are exposed to oil? Dont think so.
olddragger

 

According to Redline their 2-cycle oils are catalytic converter SAFE.

I will be trying my weird idea of mixing Redline 2-cycle oil with Redline SI-1 gas additive to get a bit of extra lubrication with cleaning. EDIT- Decided to go with Lucas UCL instead of mixing oils.

 

I experimented with some pre-mix on my last trip to LA and back. I'd posted before that I hadn't seen any difference in performance or fuel economy, but this time I did. The difference, I premixed at the 200:1 ratio (actually added 10 oz per full fill up). While MPG only picked up 1/2 mile per gallon more than without premix (or even at a lower pre-mix level), the response and feel of the engine was quite noticeable. My best guess is that there's 3-5 horsepower difference between 200:1 premix and no premix.

My Renesis goes a LONG way before it uses 1 quart of oil... and is at 20,000 miles right now.

 

This seems consistent with Racing Beat's findings in that power is increased when using a lot of premix. However, what that does for carbon buildup and the sparkplugs is a concern...

Of course it must be asked, how can you feel 3-5 hp?

 

We must remember that the oil injected never really burns, it dose not spend enough time in the combustion chamber. This is why when a car is burning oil you see blue smoke which is just vaporized oil. If it did burn you would not smell that oil smell. so I wouldn't worry about the premix.

 

Now that it is official (taken from https://www.rx8club.com/rx-8-media-news-11/refreshed-mazda-rx-8-sale-japan-140052/)

- The RENESIS rotary engine now provides an enhanced acceleration feel at middle to low-engine speeds due to various improvements such as new water and oil pumps. These changes also contribute to improved durability and stability.


Could you Rotarygod, tell us some more about that?

Pleeeease !

Cheers

jird20

 

The oil metering pump as far as I know is now all electric. It's no longer mounted in the traditional place on the front cover where it's been for 30 years. I have no idea if the actual oil pump itself is different. The water pump has a new impeller design.

 

Anyone have any pictures of the new water pump? I'm curious if it's similar to the Mazmart

 

Even the best Mazda waterpumps would cavitate about 7000 rpm without being under driven. Mazmart's doesn't suffer this fate. I'm willing to bet that while it's probably an improvement over the craptastic one that's been on the car, it's probably still not Mazmart's equal. There is an awful lot of middle ground to make up.

 

Do we know the flow rates for 2-5k rpm of the oem vs mazmart's?

I've stayed away from the mazmart water pump because I do not track and I'm not in the 8-9k rpm area for more than a few seconds, so captivation at those rpms does not bother me.

If there are improvements in the mid and low rpm ranges, then the pump would interest me.

 

High rpm's have always captivated me!

 

hehe

 

mazmarts pump also has much better bearings.
OD

 

I know the secrets they put into the pump ...

Its called ....

MAGIC !

 

Same here.