I can't figure out why i have Been using a lot of oil lately ,on a fresh 2.4. I have 900 miles on the motor and everytime i check the dipstick, about every 60-100 miles, im about half a quart low on oil. Strange thing is i never see any smoke. The only time i smell smoke is coming to a stop and its through the vents even with the windows down. my friends never see any smoke from driving behind me. The turbo has less then three hundred miles on it and the other turbo did the same thing. I just checked the compression and it was 190 across the board. Next i checked the valves stem seals on the intake side by doing a BLT with the valve cover off. For the exhaust side i pulled the exhaust manifold off and there is no oily residue on the ports. I did pull the plugs and noticed that the cylinder #3 plug is covered in black oil deposits.

Am I missing something, seems if i was burning that much oil there would be smoke everywhere.

I was going to say pull off the turbo inlet pipe and check for oil deposit/shaftplay but since you have a new turbo i doubt your oil seals are bad..never hurts to double check though. I would go though all the IC piping and make sure you don't see any oil.
I'm guessing you're rings are bad..causing the oil to get pulled though the rings and burn off

xreaction122 said:

I was going to say pull off the turbo inlet pipe and check for oil deposit/shaftplay but since you have a new turbo i doubt your oil seals are bad..never hurts to double check though. I would go though all the IC piping and make sure you don't see any oil.
I'm guessing you're rings are bad..causing the oil to get pulled though the rings and burn off

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been through the intercooler pipes, they are clean, remember this is the second turbo i have had on this setup. as for rings i would think that would show on a dry compression test, or at least show smoke on decel.

need2boostpsi said:

been through the intercooler pipes, they are clean, remember this is the second turbo i have had on this setup. as for rings i would think that would show on a dry compression test, or at least show smoke on decel.

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I had a feeling you did..and yes, your car would be puffing a significant amount of smoke when you drop the throttle(that is if the rings are bad).
Quick question, did you bother to change the oil pan gasket when you dropped the new motor in?
Our oil pans tend to get tired after over a decade of beating and they start cracking around the corners occasionally too.
Good luck with everything

xreaction122 said:

I had a feeling you did..and yes, your car would be puffing a significant amount of smoke when you drop the throttle(that is if the rings are bad).
Quick question, did you bother to change the oil pan gasket when you dropped the new motor in?
Our oil pans tend to get tired after over a decade of beating and they start cracking around the corners occasionally too.
Good luck with everything

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yeah i had to change it, The block is a G4cS, I had to use my 4g63 oil pan and pick-up tube. every seal on the engine is new. Except the dipstick which is very worn out.

Also, there are no visable oil leaks on the car, just some oil from the dipstick not sealing.

OK im taking it back to the machine shop, told them to go through it. thanks for the help guys.

I would have done a leak down test just to get a little closer to the answer. A bad ring can still get good compression.

BoostFrenzy said:

I would have done a leak down test just to get a little closer to the answer. A bad ring can still get good compression.

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yeah thats what the machine shop said, i did a half ass leakdown with compressed air, i have so much overlap in my valves that there was just a small window of rotation that would seal. I could get it to seal around 5*BTDC and air would stop going into the cylinder it was also damn near impossiable to hold it there.

I'm really stumped as the machine shop called yesterday and said nothing was out of spec but it was obvious that oil had been burning in the #2 cylinder as the cylinder had oil on top of it and the plug was covered.

Do you run a pcv valve, or just have it bypassed to a catch can?

Reason being, I was loosing alot of oil when I had a catch can hooked up and no pcv while normal driving. The bottom end was getting alot of pressure in it. It was pushing out of any gasket leak it could. Hooked my pcv up and all has been good since.

1fastlaser said:

Do you run a pcv valve, or just have it bypassed to a catch can?

Reason being, I was loosing alot of oil when I had a catch can hooked up and no pcv while normal driving. The bottom end was getting alot of pressure in it. It was pushing out of any gasket leak it could. Hooked my pcv up and all has been good since.

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I'm running a catch can with no pcv system, Ill give it a shot when I get it back, my machine shop called the piston manufacture and they have decided to try a gapless top ring and a file to fit bottom, it's just wierd how the other cylinders show no signs of oil consumption but #2 looks like it was drinking the stuff.