How much longer will my engine last?

Question edited for clarity.
Question moved to model category.

Did you disconnect the battery before this problem happened? Did you disconnect the battery when you replaced the fuel pump? Why did you replace the pump and relay? Did you reset the security system and engine immobilizer?

check for problem drive line "U" joints or cv joints

Gasoline is not the same across the country. Nearly every state and even some specific localities mandate different blends. To further complicate things, companies share product at the terminal but sometimes add their own chems before delivery.
Because of that, you need to see what works best where you live.
Further, engines are just like firearms. While a bullet from a particular manufacturer will work fine in one gun, an identical gun from the same company will not perform as well, and will shoot better with another bullet brand.
Stay with "name brand" fuels as much as possible and if there is an note on your gas tank door or cap that says premium fuel only,then use it. (putting high test into an engine that does not need it will never make it run better)
Good luck with your car!

well check to see if its 40 k or 4 years to replace timing belt but even a japanese car's timing belt last longer than that somethis up with that bmw

I don't think they have a service interval. They usually last a long time. I would guess 150,000 to 175,000 miles. Or about 250,000 km

Your car holds almost 8 quarts of oil and it doesn't need changing untill you drive 8,000 to 15,000 miles

There is a lot wrong with "low oil" and low oil is not normal in a low mileage healthy engine.

The dealer is fobbing you off in the hope you will go away.

If the oil is being changed at least every 5000 miles or so there should be minimum oil depletion between changes with only very minor top up needed. Some oil consumption is normal but it should be minimal.

If the oil level is dropping to a very low level in about 4000 - 5000 miles of normal motoring you have a significant problem. The oil is either leaking out or the engine is burning excessive oil or a combination. If there is no leak through faulty seals or by other means such as oil escaping into the cooling passages of the engine, then there is excessive burning.

These engines are known for excessive oil consumption because the problem is a common one in the 06, 05, 04 and previous year builds back to about 98/99. The dealers know all about this problem - as does BMW - and they will try to fob you off until the car is out of warranty because the fix is expensive.

From what you say the problem has not been fixed on your car. Document the oil loss and insist on your warranty rights because your engine is using excessive oil and this is NOT normal in a properly functioning motor with as few miles as yours has. Make it clear to the dealer that you are well aware that excessive oil consumption is a common problem in many of the 325 petrol engines and you want it fixed under warranty.

Then sell the car as these vehicles will cost you quite a bit in repairs once out of warranty and once you clock up around 60000 miles or more. If you have an auto you can expect major problems at about 65000 miles (later if you are lucky) and replacement of the transmission will be necessary. Once you notice any significant problem with the auto transmission it is on it's way out.

Cheers
Sean

3800 is a great engine. Good GM vehicle, 93k miles & should be good for that many more miles. Mine has 210k now & no engine trouble. Very little mechanical issues, Good luck

Might be a good idea to get a 2nd opinion..

CV boots usually last longer than that..

no spl tools required.use only bmw parts.will last longer.