White smoke from tailpipe and low oil pressure

Get a scanner from IPD for $80 and it will tell you what you need to do.

Does the smoke smell like burnt antifreeze or motor oil?

White smoke is usually coolant, in the exhaust,if your loosing some and it is a constant thing
Bad intake or head gasket

One of the head gaskets is blown allowing coolant into the combustion chamber causing the white smoke and low coolant. Also allows oil into the coolant and coolant into the oil.

Get it fixed before you ruin the motor. It is expensive to get fixed, but cheaper than a new engine

It could be a coolant or transmission fluid leak in the combustion chamber. Check your coolant and transmission fluid to see if one or both are low. White smoke from the exhaust is a classic symptom of a blown head gasket, have your cooling system pressure checked. If that checks out good then have your transmission checked.

have compression check done on all cylenders. sounds that it could be seeping and burning this new anttifreez. can burn out pistons if so. if you have a turbo have your seals checked as they could be hardend and cracked causeing seepage. also note if your oil or coolant levels have been coming up small amounts short, this could tell about the same as the comp tests

yeah, its your head gasket. the oil looks like that because it has coolant mixed in with it. it will try to start because its getting fuel and spark but no/not enough compression.

how much white smoke? white smoke usually indicates a headgasket
oil should not be black that quick

One way to check for a blown head gasket, is to simply smell the coolant reservoir. Pop the cap, and see if it smells like raw gas. Every headgasket, I've diagnosed has had this smell, even if the oil is not contaminated. Another way is to hook up a coolant pressure tester, and run the vehicle for 15-20 mins or so. If the head gasket is blown, the pressure will exceed 15 psi. sometimes as high as 25 psi. If there is oil in the coolant overflow tank, the head is cracked, about 90% of the time.
I'm working on a 03 Saab 95 2.3l t. This vehicle smokes on initial start up, then the smoke disapates, and the vehicle is fine. Another mechanic diagnosed it as bad valve seals. I disconnected the pcv system, and the vehicle no longer smokes. If the valve seals have gone bad, the vehicle will smoke on acceleration. Also if the turbo seals are leaking it will smoke more heavily on acceleration.

This is caused when oil gets passed the rings n the pistons. Its due to wear and tear or old motor needs rebuilt. now you can put a bottle of motor honey in it. or some of that smoke be gone you find in wal-mart auto section of store this will greatly reduce your white smoke till you can get it rebuilt .