Crybabii

before you guys say anything.. I did searched and searched, but didnt find any usable info on it..

OKAY my car puffs out a lot of white/blueish smoke when i start it up.. I mean a lot!! but then nothing only a little when revving.. I switched to Castrol GTX 20w50 today and would like to know if this engine oil is any good? and would it burn clean?? I dont even know if its 100% mineral oil, is it??

anyway my engine was just rebuilt and all seals are changed..

Thank you Stephan

gio64

iTrader: (1)

Well, if it smokes white only and it doesn't smell sweet, you're OK.
If the smoke is blue and it doesn't go away and gets worse when you step on, then it's very likely that your turbos seals are leaking oil.
Changing oil type is not going to do anything, you need to rebuild your turbos or get a new set, or go single, something that resolves your seals problem.

Castrol GTX is what most people use unless they have separate lubrication for the apex seals, or they have switched to a different oil after a rebuild, but usually 10w 30 is the viscosity used. Some use different grades as they live in colder or warmer climate, but once again, if your seals are bad, there won't be any oil that will cure that problem.

I changed my turbos last summer and the symptoms you describe were the same I had.

I hope this helps.

Crybabii

I just changed my turbos as well, i think its the omp, cus when i disconnected the wires for it the smoking stops. maybe its leaking from the nozzle?? anyway does gtx burn clean.. no carbon build up??

Ottoman

no oil will burn totally clean..

but GTX is a mineral oil.. and will burn better than the synth ones

Crybabii

great thanks guys..

gio64

iTrader: (1)

Are you sure the turbos you replaced are good?
If so, you should search about the oil injectors problem.
I haven't experienced it, so I don't know this from my direct experience, however, here's what I know/remember (everyone, please chime in and correct me if I misunderstood/misread something): there should be a check valve in the oil injectors that allows air in but doesn't allow pressure to escape back. When they go, the oil injected is pushed back out and it ends up in the turbine intake section, to be sucked back in with the known consequences. To test for that, you should disconnect the two hoses hooked up to the primary intake elbow and vacuum check them as those are the lines going to the injectors; if you can suck back, the valve is not doing its job.
Once again, please search and/or confirm with more knowledgeable people.
I still find it strange that you would get smoke at idle, since IIRC the OMP mixes oil to gas in percentage equal to 1:400, so I cannot see all that oil being injected at idle, unless the pump itself has a problem...
I hope this helps

Crybabii

it's not smoking at idle, just when the engine first started.. big big puff of white smoke when start up, thats it.." could it be the omp injectors are dripping oil while the car is parked?? so when I start ip up big puff of smoke comes out.. OH, I noticed water droplets in the exhaust while 1st starting up the car.. is it normal or should I be worried

Coolant_Leak

iTrader: (18)

i always assumed it was normal at start-up. i get that fog machine start-up too until it warms up to about 34-44 C. also using castrol gtx 20-50, seems to work fine for me so if it aint broke im not touching it lol. although i wanna try royal purple syn.

white smoke = water base so i dont think its oil which normally burns darker
water droplet formation = condensation? i've noticed it from time to time as well.
just my guess. im not an expert

gio64

iTrader: (1)

As stated above, white is condensation, which also drips out of the tail pipe while warming up. Happens to me as well. Water is one of the by-products of combustion, so it is not abnormal.
It is also normal to see a small puff of blue right at start up (firing up the first time) as it is left over unburned oil from the injectors, from the last time you shut it off. I don't always notice it, but sometimes I do, and I hear that it is also OK.
If you are dripping oil out the tail pipe, you'd be able to tell, its consistency is different from the one of water.

I don't believe I asked you this before, however, have you monitored oil and coolant?
If your oil level is stable (goes down as it should), then I guess there is no problem with the car. When my car was smoking blue, the oil level was going down abnormally.

Crybabii

my oil level goes down about 1 quartz about 600 miles, coolant drops about a cup after 3days of 600 miles..people say that if the smoke smells sweet than its the coolant, but I've been smeeling that exhaust everyday to try and figure it out if it's sweet or not and I can't figure it out.. its just exhaust smell to me.. haha

gio64

iTrader: (1)

I am not sure exactly what that consumption is, but just like that it seems to me that it is a on the high side, I don't think you'd use 400 liters of gas to do 600 miles (960 kms give or take).

As far as the coolant, you shouldn't be using any at all. My car doesn't lose any, period. I can drive all I want and it's still all there. The only two occasions in which I have had to replenish some were:
1) Hole in coolant hose that goes from block to UIM
2) After a coolant change, to finish burping the system.
But once either was done (hose fixed or burping done), that was it, it was in there for good.

From what you're saying, your coolant is going somewhere, and by the sound of it, it's not a good place (combustion chambers or ground).
There are a few things you can do: there is a test to check whether or not there are bubbles forming up in the coolant system. You need to rig up a bottle to the rad cap (if I remember correctly) and then let the car warm up, let the thermostat open and watch for bubbles. You can do a pressure test, but this will simply tell you that you have a leak, not what type of leak.
I would look into both oil consumption and coolant. This last one seems to be particularly a problem.
I hope this helps.

mrb63083

iTrader: (4)

I use 20W50 in the hotter months and 10W30 in the colder months. I find that if I use 20W50 in the winter the car barely starts when completely cold.

UpSideDownDesi

i also get a lot of white smoke at initial start up and it goes away when the car warms up. I recently got the car and changed oil 500 miles ago. I removed the oil cap, and saw the whitish foam type condensation building up. From my understanding is that this will happen if you don't DD your car and, it gets very short on/off duration (ie moving in and out of garage). Previous owner didn't drive the car much either (on/off or around subdivision to keep fluids moving). I have a STI that i don't DD either, but drive it more often than RX-7, it also get condensation in exhaust, but no whitish foam build up.

Water out of exhaust is good, but condensation at such level (whitish foam) to me isn't acceptable. So drained the recently put in oil, put in some cheap oil (same viscosity or close), ran it in the car for a day, drove the car hard couple of times, and drained the oil again, and replaced oil filter. It hasn't puffed out smoke since. You can get oil engine flush something also, but i prefer running oil through. Only about $16 out of pocket.

If u get the fog machine at start up i say u do the same to get most of the moisture out of you system. Also, run a bottle of "Heet" (yellow bottle) if you haven't to remove moisture out of your fuel system. You can get it at local autozone or walmart. It's also a good thing to put in your tank when tracking or running your car hard. It's 100% methanol, bump up octanes rating 1 or so, make the car more knock resistant. Safe to run 2 bottles, but consult your tuner before doing so.

1QWIK7

iTrader: (33)

You'd be surprised the amount of condensation that builds up in the exhaust.

Especially in the colder weather. When you're exhaust is HOT, then sits after the car is off in cold weather, that builds condensation.

That being said, if you are getting smoke during warmup, as long as you KNOW its condensation, obviously thats normal. If after a while of driving, you still notice white smoke, thats probably your seals going/done.

I sometimes get the thin cloud of blueish smoke upon cold startup which i was told was normal. So i dont even bother worrying. There are even some days where i get zero smoke. I change my oil religiously so i think that has something to do with the lack of cold startup smoke.

KAOFD780

im using castrol gtx 20w50 right now on a fresh rebuild, no problems so far its been about 7000kms, oh and this is only during summer/spring with a high of 25 degrees celcius and lowest probably 1, since i do not drive the car in the winter.