Hey There,

I own 2000 Mazda Protege 1.8 litre with 181,000 KMS on it.
Problem is when in the morning when it's cold I start the car whiteish and blueish smoke comes out of the tail pipe and then goes away.
The oil I use is 5W30.
Should I use any oil additives to stop this problem?

SOS

 

That sounds like normal wear on valve guides and seals to me.
Another possibility is if the return oil passages are partially blocked causing the oil to pool on top of the head.

You might try a high mileage oil, said to have seal rejuvinating properties.
If that doesn't work, the next easiest/cheapest solution might be to remove the valve cover and clear the return passages followed by a complete oil change. A wire coat hanger works wonders for this.
If neither of these solutions work, then I would say its time for guides and seals.

 

Thanks for the reply.
Today it was a rainy day and the car was left outside for 8 hours and when I start the car no blueish smoke appeared. Only when it is cold like 32 C the smoke occurs.
I changed the valve cover last May 2011.

 

Question: Do you really consider 32°C "cold"? In my part of the world 32°C equates to a little over 89°F, and I consider that "hot".

If the smoke is more white than blue then it is primarily steam. Assuming steam is what you're seeing, then it is very common following a cold start; the colder the ambient temperature is, the more dense and the longer the steam will persist until the exhaust system comes up to temperature.