Do not have to pass emissions here.

As for the smoke, like i said i have not noticed anything which is what's really puzzling.

When i start it or let the car idle for a few minutes there is not an accumulation of smoke.

Does anybody else have any ideas?

 

This just sucks because i am really enjoying the car in all aspects, i am just not liking having to add so much oil all the time.

I researched the s2000 before i bought it and was aware that they used some oil, but from what i have read it says the f20c can burn as much as 1 quart per 1000 miles whereas my consumption is twice as bad as this..

 

The Opening post didn't indicate an oil change, and some people would think that if they're adding a quart every 500miles, then the oil is effectively changed every 2000. Silly I know, but it doesn't hurt to ask.
EDIT: Oh and the drain plug has it's own compression gasket that should be changed with every removeal. But most change places don't

But if we're sure the oil isn't leaking, then the recomendation above for a heavier oil is good. It would be nice to know where the oil is going for sure though... Is the coolant clean? No oil in the radiator correct?

 

Sorry i failed to mention the oil change interval earlier, but yes oil and filter is changed every 4000 miles with mobil 1 synthetic 10w-30 oil and the OEM honda oil filter.

I replaced all the fluids in the car shortly after i bought it back in august, including the coolant (which was still clean at the time of replacement).

I just went and checked my coolant, it is bright green with no trace of oil..

I will definitely try switching to a heavier weight oil for my next change, perhaps a 10w-40.

This is all just very confusing as i am puzzled by the disappearing oil, everything else seems normal.

 

What does the origional owner say about the oil consumption while he was the owner? As others have said, either it is being burned (or otherwise going out the exhaust) or it is leaking out of the engine. After it is warm, check for oil leaks with the engine at higher rpms. As engine rpm increases the pressure increases until a spring relief maintains the oil pressure at a max pressure. The leak may only appear at the higher pressures. If the oil consumption has always been high, then you might want to abandon the synthetic oil and go back to regular oil. If it has always had synthetic oil, the rings may not have ever worn in and properly seated. Honda says to *not* change the origional oil until the specified mintaince interval.

 

i was actually in the same situation as yourself, except mine was consuming about a quart every 1000 miles. previous owner used only mobil1 10w30. many many many people on the forum have had oil consumption with mobil1, i recently tried castrol 10w30 and in the past 3000 miles my car has only consumed 1qt of oil.

you can also clean your pcv valve, which may or may not help

 

The original owner did mention to me that these motors use some oil (which i was already aware of from my prior research) and to check the level often..however he did not specify just how much oil it used, nor did i ask.

I have searched all around the engine and engine bay and it is all very clean, i assumed if it were leaking out oil somewhere it would be a mess down there which isn't the case.

I have not checked for leaks while the engine is at higher rpms, i will have to do that.

zoomkat, you make a good point about the possibility of the rings being not properly seated. Before i made this post i searched some other threads and read that if you switched to synthetic to early on in the engine's life, the rings may not have been properly seated. As i am unaware when the original owner switched to synthetic, this is definitely a possibility.

Would it be a good idea to switch to dino oil for my next change? And if the problem is the rings being not properly seated, anybody know how many miles on conventional oil i would have to drive in order for the rings to seat adequately?

 

Its going to either leak or burn the oil..
if you're losing a qt/500mi.

You'll definitely notice it either on the ground or from behind.

are you sure you're measuring the dipstick oil level correctly?

 

tekstar, which castrol 10w-30 are you using? And is it conventional or synthetic?

 

You would think so..but i honestly for the life of me am not noticing it on the ground or from the tailpipe. I had a car years ago when i was in high school that burned a fair bit of oil, not even as much as my s2k, but it was definitely noticable (with the smoke).

And in regards to the dipstick, yes i believe i am reading it correctly. It is my understanding that from the low point on the dipstick to the high point constitutes about 1 quart. And i know you're supposed to read it on level ground and check several times and looking at both sides go with the lower reading from the dipstick.

Each time after filling my oil to the high point, after driving a couple hundred miles and checking my oil, it is already down a couple X's on the dipstick.