OIL LEAKING COMING OUT OF DIP STICK HOLE

lots of causes yes,. "ALT" engine code.
on tappet? , valve cover, or in the cap to it? we can not see it.
why not first tell where you see oil where it does belong or the reverse.

OIL in the RAD CAP neck hole , (engine dead cold only touched)
dip stick engine , looks like milk or floating green AF there.
AF antifreeze in A/T tranny box,see on its dipstick
leaks seen anywhere? do tell.inside or outside things.
do a radiator leak down test, (a tool)<<has gauge with it)
and see if it leaks down at all if does it is bad, find the leak.

inline 4 bangers (very fuel leakage paths unlike my old v6)
see steam at tail pipe end rear of cara? when normally not there? running hot engine only ,
does the radiator overfill bottle, each morning before cold start
show a drop in coolant here (a zero tool test that)
white ,foam under oil filler cam is common on cars driving only short distances. due oil never getting fully hot. <true cause) normal that.
rad neck , see oil or carbon, not good
see milk on any and dip stick bad.
see green liquids running inside any valve cover deep inside there, al bad that. super bad. do not drive it like that.
bad oil can wreck any engine super fast.
even drain it out and see what the oil looks like all of it.

good luck.. worst is cracked block running pure water for antifreeze

all engines burn oil, ALL!
and if you dive faster, it burns more. (rate)
you did not state the rate, here in USA we do
quarts per mile (liters are same )
1 qt/ 3000 miles is norm.
but if you dont service a vehicle , for sure every 60miles.
100km. the PCV valve will clog and the crankcase will go over
pressure, and the car will leak and burn more oil.
the dip stick hole must **** not blow.
if it dont **** , running, the PCV is DEAD !
(1960 to present same deal)

The problem you have is a cracked block. This allows water to get into your oil, and that causes the milky appearance. As you might imagine, this is not a good thing. You can try the block seal, but, there are no guarantees. Good luck. Oh, and by the way, it has nothing to do with the dip stick, just the water and oil failing to mix.

COULD BE THERMOSTAT IF TOP RADIATOR HOSE IS NOT HOT AND BOTTOM RADIATOR HOSE GOING TO WATER PUMP IS HOT THE THERMOSTAT STICKING PARTIALLY CLOSE.IF TOP HOSE IS HOT THE RADIATOR,ENGINE BLOCK HEATER CORE NEED FLUSHING OUT.IF WATER PUMP WEEP HOLE LEAKING REPLACE WATER PUMP, FAULTY WATER PUMP WILL CAUSE ENGINE TO OVER HEAT.REPLACE RADIATOR CAP MAKE SURE YOU HAVE 50 / 50 MIX SOLUTION ANTIFREEZE AND WATER IN COOLANT SYSTEM. IF ALL LOOKS GOOD CHECK ENGINE OIL ON DIP STICK, IF OIL IN DIP STICK LOOK LIKE MILKSHAKE YOU HAVE BLOWED HEAD GASKET THAT WILL CAUSE ENGINE OVERHEATING WHILE DRIVING CAR IN SHORT DISTANCE AND ENGINE OVERHEATING.

you need to find that leak, is the leak visible? if its not from radiator or the reservoir, the only other place I could think you can lose water is the head gasket. It happens to high miles and hard driver. 100k miles would likely be a head gasket. Leaking head gasket will also cause the engine temperature to rise and run super hot. antifreeze will leak through the head gasket down to your oil pan mixing oil and water. Check your oil by pulling the dip stick and see if you have oil mix with water; it will have a slimy looking colors, oil is light color and it should never be black. if it black than change your oil and inspect it afterward when the car has been running for while. when engine really hot cause the heat to effect the starter not to engage or start or engine is too hot to run. repairing head gasket could run anywere from 500-800 bucks.

You probably have a blown head gasket, not allowing you to get enough compression built to start the engine.

Rent a compression tester from AutoZone (You get your money back when you take it back) and use it. If the compression on each cylinder is less than 100 PSI, you've got some issues. The cylinders should also be somewhat balanced.

Oil leak will not change run temp but can cause a fire.
The smoke is the oil burning on the engine. The 1st thing you need to do is clean the oil off the engine.
Next top oil off to the full line on the dip stick.Now start the engine hold idle up to around 1600 rpm for 1 to 2 minutes keep engine run and look for the oil leak. Don't get caught in any moving parts and things will be hot so be careful. Most likely from your valve cover.

oil might be low. check the dip stick under the hood and see if it's in the lines. if is between the lines go to an auto parts store and most will check with a code reader for free for you.

could have the wrong dip stick holster or wrong dip stick there sould be a bolt holding the holster down in the side of your motor if you losen the bolt take it out an chek the seal around the holster if the hoster dose not snug in our out you can buy a new one and try that but im just taking a wild guess or while you have the holster out look down it an make sure it dos not have something jammed in it

clean engine breather the pipe that runs into the air intake from the rocker cover