When purchasing my car, the dealer mentioned about checking the oil every so often (every Gas fill up). Has anyone determined the rate oil consumption yet? or at least an average?
I've been checking it , but haven't noticed any significant changes yet.
Well, I guess another way to ask that question would be how often do you top your oil off?

Thanks,

I check every two fill ups. Need to fill about every 4 fill ups

Thanks for the quick reply. When you say fill, do you mean you add a quart every 4 fuel fill ups, or just top it off every 4 fuel fill ups?

need to fill up right when i changed the oil at 4700 miles.

beers

My car used about 1 qt/3000 miles - over the first 3000 miles.

My car uses between 1/4 and 1/2 qt about every 2000 miles. I still check it every two or three fillups (gas), but mine at least doesn't use oil that fast. So there is some variability. You have to get the rhythm of your car. Just one of those fun little things to do... :-)

mm

i have 1900miles on mine and its still full, but could be due to the fact i broke it in properly.

Originally posted by OBryanRX8
i have 1900miles on mine and its still full, but could be due to the fact i broke it in properly.

Should NOT be full if you have not added any oil in 1900 miles! The oil metering pump injects oil into the intake stream for lubrication of the apex seals and housing. That oil is not recovered and is lost through the exhaust.

Either your engine was significantly overfilled when new, or you have some serious oil dilution issue, or you really aren't using any oil. I doubt it's the last as from what I understand the engine would not be able to generate compression without an oil film.

Having 12,700 miles on mine, I have found the oil consumption has decreased. I may have to add a 1/2 quart between oil changes, at most.

it's been a qt. every 2000 for me so far, no biggie

I have added about a quart after 2000 miles

I have found that my car uses a consistant 1 1/4 quart every 2500 miles. I thought this is a bit much. I admit I drive it pretty hard, but is this usage "normal" for the renisis.

I first had to add a quart of oil at 2000 miles. Seems like that is the most consitant repsonse I've seen.

i have 1500 miles on my 8 and have added half a quart thus far.

you can just pour more oil in without changing the existing oil?? i did not know that

Haven't had mine long, but at 1200 miles I added 2/3 of a quart, which brought it up to exactly the full mark.

I've noticed that after the m flash my 8 has stopped using oil should i be worried . its been 2200 miles since the flash

I also added about 2/3 of a quart after 1000 miles. Have not had the M flash yet. Don't know if that will change anything.

I have 6000 mi and have found that for the first 3000 using 5w-20 I needed to replenish more often. The second 3000 miles I have used 5w-30 it doesn't seem to burn it as bad. Make sense to anyone else or has my elevator stopped hitting the penthouse? :)

well ive just got 50 litres of oil for free whopeeeeeeeeeeeee!

I was just wondering about oil consumption. I've got about 8k miles on my car right now and have never needed to add oil. I've had two oil changes done to the car. I checked it last weekend and was about 3/4 on the dip stick. I don't really drive the car hard at all, I'm pretty smooth most of the time.

I purchased mines last year around June and one of the problems I had was that they had to change the oil pan and sensor, something about relocation and a recall. Once they did the oil pan change now I don't have to put oil but once every other month and that's about a quart, regardless how many times I fill up which is at least twice a week because I never drive normal. I have never gotten 24mpg I've gotten as low a 10 and 11mpg when I'm gunning it all the time and about 18-20mpg. I did installed a KN filter and athat cause it tio be peppier and give me better mileage. You can put a KN filter and not void the warranty, but if you put a fresh air intake then you void the warranty and you're on your own it's what the Mazda dealer told me here before I installed it.

i wonder if oil consumption is related to the way the vehicle is broken in, because for the evo, if you broke it in "correctly", the evo doesnt consume any oil at all, so i am wondering whether the method of break in will affect future oil consumption.

I've driven my 8 so far about 1000 miles. (It had 16k on it when I bought it). I've put about 1 quart in... but I'm not sure how much you can read into that. The cat was clogged, and it was drinking fuel.. 10-11 MPG while babying it.

Now that the cat is fixed, I've topped it off and we'll see how long it'll be before I had to add more.

Allmotor, my (limited) understanding is that the rotary engine uses oil as part of its design. Comparing oil consumption in the RX8 to the Evo isn't a good idea, as the two engines function very differently. No matter what you do during your break-in period, your 8 will still consume oil in everyday operation. How much it consumes is probably dependent on how hard you flog it.

A question that I have for all of you-
The dipstick has a low and high mark on it. At what point do you let your oil level go to before you add? If the oil gets to the low mark, how much must you add to get it to high?

At what point do you let your oil level go to before you add? If the oil gets to the low mark, how much must you add to get it to high? I've found that if the oil is about 1/4 inch above the low mark, and I add 1/2 qt, that takes it to 1/4 inch below the full mark. This is on the original '04 dipstick.

Search for the TSB for the "new" dipstick -- it has markings every 1/2 qt -- it looks like the total distance between full and low is a little over 1.5 qt, but it's not a linear scale.

i wonder if oil consumption is related to the way the vehicle is broken in, because for the evo, if you broke it in "correctly", the evo doesnt consume any oil at all, so i am wondering whether the method of break in will affect future oil consumption.
Absolutely wrong. Read post #8 in this same thread for an explanation.

Absolutely wrong. Read post #8 in this same thread for an explanation.

i know that the 8 consumes gas on its daily basis, i am only wondering if babying it during its initial break in period will have any affect on future oil consumption. if that were the case, then it seems like babying it for the first 1000 or so miles is well worth the effort, as hard as it may be to keep the engine from winding up.

i know that the 8 consumes gas on its daily basis, i am only wondering if babying it during its initial break in period will have any affect on future oil consumption. if that were the case, then it seems like babying it for the first 1000 or so miles is well worth the effort, as hard as it may be to keep the engine from winding up.
I'm going to assume you meant '...consumes oil...' not '...consumes gas...'

OK, I didn't make it clear.

Why does a piston engine 'consume' oil? In a piston engine, oil should be below the piston rings in the crankcase, and not above the piston rings in the combustion chamber. The cylinder walls are lubricated by oilsplash from below as the piston rises, and should be squeegeed almost clean by the rings as the piston descends. Therefore, in order for a piston engine to consume oil (not counting leakage) oil has to get by the rings. Improper break-in can cause wear situations where the rings do not properly seal, therefore leading to oil consumption.

Why does a rotary engine 'consume' oil? In a rotary engine, the only way to lubricate the seals is to *inject* oil into the chamber for the apex seals to have an oil film to lubricate as they spin around. There's no up-and-down division of what's 'oily' and what's 'not oily' as in a piston engine. Because the oil is *injected* it gets metered at a fixed dose depending on engine temperature and RPM. Given a properly-functioning oil metering pump, a 0-mile and a 200,000-mile Renesis should use the same amount of oil at the same RPMs and temperature, since it will be metered the same way on both. Minor variations may occur from differences in the pumps, carbon build-up on the oil outlets in the engine, etc., but everything else being equal, the only wear parts involved (the apex seals) should not affect oil consumption regardless of break-in style. I think break-in with a rotary is partially about seals, and partially about thermal conditioning of the metal.