burning oil like crazy... wtf?

He mentioned that they have seen this probem before do to carbon buildup.

Carbon build up where?

Maybe I'm being naive, but it seems to me that carbon building up in the motor is more likely to be the result of excess oil entering the motor than the cause of it. I've read that a bad PCV valve can cause a car to use a lot of oil. Since they're really cheap, you might want to try replacing yours.

Also, never, never, NEVER run your car 2.5 liters low on oil! Since your car is burning oil you'd best keep a close eye on it and top it off from time to time. A can of oil is cheap, replacing the motor's bearings won't be.
 
carbon build up on the valves stopping them from closing properly, creating vacuum where there shouldn't be and such alowing oil to be pulled passed the seals.

PCV valve is fine, ball still rattles and allows air to flow out of the valve cover but not in.

And I would never run my car that low on oil, too bad the check oil light only comes on when you have 1 litre left in the system and you corner hard. I hadn't had a problem prior to this oil change so I don't check it on a regular basis. I just change it every 5000km.

I might have found out what the problem is. I changed to Royal Purple 10w30 Synthetic at 80,000km and now at 86000km I am out of oil. Before that I was using Castrol Syntec without a problem. Talking to one of my mechanics at the shop i work at, he has seen problems with synthetics causing low oil pressure and other problems. I'm gonna go back to a Dino based oil and see what happens.

Matt


Matt
 
i used to tell my customers that. basicly it mean gfys. they want you back when its puffing and blowing and past warrintee!

I doubt that carbon build up will accelerate the consumtion of oil. if it were to pull oil from there it would do it open or "almost closed".

I personaly would stop going to that dealer.....
 
I don't think you can say that. They wanted to book me in for this weekend to take a look at it. I said no, I want to see what happens over the next 5000km and see what it is like.

Thats when he recommended getting the mazda oil consumption log started. They are the #1 Local dealer, they are installing a free alarm in my moms Mazda 3 for her because of the attempted break in problem.

And I don' think they are going to blow me off for 15,000km to bring it in for the problem.

They are very honest, even when I asked about any problems with the RX8 as I was looking at getting one. The service advisor layed it all out on the table for me.


Back on topic -

I'm going to sea foam and switch back to the Castrol Syntec. I know I should do one at a time to see what effects the problem. I don't care what fixes it, I just want it fixed.
 
oh. well when you put that way thats a really nice place. but still think if it were to pull oil out from the stem seals it wouldent matter what position the valve is in. please dont make me get into how a motor works.

if you look at my post explaning how damage of the head seals below, it will explain how this might have occured in your motor. yes a petrolum based oil might be a littil thicker helping the oil not seep past the seals and into your combustion chamber. still not fixing the problem.

unlike some jerk knocking on mazda. I think they have made a strong motor on which thousands of people have succesfully installed "bolt-ons". some however need to take into consideration a "bolt-on" might be to help them to compinsate for there "spirited" driving since mazda does not make a car for such driving. now that could be a fight, but your "spirited" and my "spirited" and mazdas "spirited" could all be a diffrent thing. yes mazda does make a sporty car, but never was the oil pan designed for long high "g" turns durring verry high revs. this (starving oil from the pump) can only come from (from where I come from) beating on your car.

the lack of oil up there has turned your seal and or valve into microninc sand paper, slowly sanding whats left of the seal up there. vacum or not it should not leak. sorry but slow consumption of oil will only lead to large consumtion of oil. sea foam is a cleaner not a fixer.(deadhorse
 
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Makes sense, but why all of a sudden like this?

And would you not consider 2.5L of oil in a 5000km period a large consumption?

I find it wierd though that the whole problem coinsides with a change to royal puple oil vs the Castrol Syntec which I was running with no problem.

The engine could probably use a dose of Sea Foam regardless of the oil burning. The idle with my AWR mounts is moer than a little shaky. Plus you can feel the car pulse in time with the air/fuel swing from rich to lean. Its brutal.
 
Makes sense, but why all of a sudden like this?

because of the change in oil type has made it more pronounced. maby it was just a small amount before and you did not notice.

And would you not consider 2.5L of oil in a 5000km period a large consumption?

whats L and whats km????

I find it wierd though that the whole problem coinsides with a change to royal puple oil vs the Castrol Syntec which I was running with no problem.

why is that weird? why would you not excpect a change? isint that why you switched, for a change? a change in protection needs to come from someware.

The engine could probably use a dose of Sea Foam regardless of the oil burning. The idle with my AWR mounts is moer than a little shaky. Plus you can feel the car pulse in time with the air/fuel swing from rich to lean. Its brutal.

yup, sounds like a plan.
 
LOL

L = litres

km = kilometers

I'm Canadian eh!

So... 2.5 quarts per 3000 miles

I wouldn't expect that a performance oil with "better" protection wold leave my motor unprotected? If you get what i'm saying. Unless it is that much thinner but they are both listed as 10w30. Lies I tell you

I'm going to do some investigating tonight, PCV valve, compression test, check the spark plugs for contamination
 
Makes sense, but why all of a sudden like this?

And would you not consider 2.5L of oil in a 5000km period a large consumption?

I find it wierd though that the whole problem coinsides with a change to royal puple oil vs the Castrol Syntec which I was running with no problem.

The engine could probably use a dose of Sea Foam regardless of the oil burning. The idle with my AWR mounts is moer than a little shaky. Plus you can feel the car pulse in time with the air/fuel swing from rich to lean. Its brutal.


The Royal Purple more then likely has different cleaning type of esters or whatever its called then the Castrol which in returned cleaned different areas of the engine. When most people switch from dino the syntec, the syntechic cleans off the gunk that was blocking a area that normally would leak if it was clean. for instance most gaskets start to leak after awhile.

Edit: Thats why they say its better if you stay with one type of oil because it may have ill desired effects. Like cleaning areas that normally would leak once all the build up is removed.
 
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Hello,

Over the last weekend, I experienced something that scared me...a bit... I went on a long drive with a buddy of mine and he kept calling me on the two-way every time my car spouted a load of blue smoke from the muffler...Three things I found were...

The smoke came at a severe downward incline, on high G turns, and a combination of incline or high G turn and revving past 5000 rpm.

Now, I have vacuum and oil pressure gauges installed and I only noticed a tiny bit of pressure loss from the oil pressure gauge during high G turns. I didn't notice any loss of oil pressure during the severe incline or 5000 + rpms. I also did not notice any loss or variation in vacuum in any of the aforementioned conditions...I too am losing about 1/2-1 quart of oil/2000 KM and have neither external leaks nor visible internal (oil in coolant, fouled plugs) leaks. My PCV valve is also in tip-top condition.

I know that the best way to find out what's what is to get the car to a garage and have both leak-down and compression tests done; but until then...I'm worried too.

Sorry, didn't do this to jack the thread, just thought the problem is at the very least, vaguely related...
 
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The Royal Purple more then likely has different cleaning type of esters or whatever its called then the Castrol which in returned cleaned different areas of the engine. When most people switch from dino the syntec, the syntechic cleans off the gunk that was blocking a area that normally would leak if it was clean. for instance most gaskets start to leak after awhile.

Edit: Thats why they say its better if you stay with one type of oil because it may have ill desired effects. Like cleaning areas that normally would leak once all the build up is removed.
Makes a lot of sense. I had been running Mobil1 for some time and I decided to switch to Redline because people said it was so good. Like you said I think it made a minor/unknown problem very noticeable.
 
In the same boat

For the last three oil changes, I've noticed the level down as well. No smoke or visible leakage anywhere. Still drives fine too. One thing that IS different, is the amount of oil that appears to be leaking from around the oil cap. A big dirty, oily spot around it and some drips down when taking it off. Just the last three changes though. I ran the engine without the cap and when I put my hand over the hole, I can feel an alternating sucking/blowing (I think, its hard to tell) and a very fine mist of oil is on my hand when it comes away. Any thoughts?
 
For the last three oil changes, I've noticed the level down as well. No smoke or visible leakage anywhere. Still drives fine too. One thing that IS different, is the amount of oil that appears to be leaking from around the oil cap. A big dirty, oily spot around it and some drips down when taking it off. Just the last three changes though. I ran the engine without the cap and when I put my hand over the hole, I can feel an alternating sucking/blowing (I think, its hard to tell) and a very fine mist of oil is on my hand when it comes away. Any thoughts?
The fine mist that your feeling is the lubercation process of the valves ect ect. I get the same thing around my oil cap... now I belive its just to the fact that its wore out on mine becuase its plastic so it doesn't seal as godo as it used to.

Yes. You're engine's running.


^roflmao
 
all you oil cap worriers....

take off the oil cap, turn it upside down and look at the dried out, petrified, cracked, and now useless rubber sealing ring.

This is why you have a leak there, as do I, as do most car owners of any brand.

Matt
 
all you oil cap worriers....

take off the oil cap, turn it upside down and look at the dried out, petrified, cracked, and now useless rubber sealing ring.

This is why you have a leak there, as do I, as do most car owners of any brand.

Matt


Thats what I meant ot say that its plastic and rubber but you obviously know what im talking about. :cool:
 
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