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Diesel
i am guessing you should use premium gas for a Chrysler 300. Regular is ok unless you have a SRT8.
No. Premium has a little less energy than regular. (Diesel has more) You use premium gasoline because it explodes a little faster, and will prevent the engine from knocking. Your owner's manual will explain what octane level of gas you should use.
As you failed to list which model 2000 BMW, I cannot provide an answer. BMW makes many vehicles including diesels. All I can tell you is to use exactly what the owner's manual states. if it states Premium, then use Premium. Using Regular can cause engine damage over time. If it says use Regular, then use Regular. The use of Premium is a waste of money and provides no benefit whatsoever. Of course it it is a Diesel, then use the correct Diesel.
Use what the manual tells you....regular gas.
" regular " unleaded , 87 octane
you can use regular or premium
Premium is required
The good thing about the x3 is that it's a more reliable BMW than other BMWs. You can have the option of using regular or premium without damaging it. But even tho regular is cheaper, you get less miles to the gallon than premium. So it pretty much balances out. It's a better idea to use premium.
BMW always recommends using 98 RON petrol (gas). Which is premium unleaded.
I used regular gas in my 2009 Murano. Ocassionally, I use the premium when I have extra cash.
Petrol models use regular unleaded petrol. Diesel models use regular diesel.