Premium unleaded is recommended, but I'm running 92 octane std unleaded at the moment, hasn't made any difference. Pete
BMW only takes gas rated at octane 91 or higher, and that is Premium at the gas station.
BMW always recommends using 98 RON petrol (gas). Which is premium unleaded.
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.
i am guessing you should use premium gas for a Chrysler 300. Regular is ok unless you have a SRT8.
The BMW 323 i takes Premium gas,but can use mid grade as well. premium is preferred.
Use what the manual tells you....regular gas.
Diesel
In order to preserve the motor in your CTS you should put only premium gas in it.
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.
Yes. You may not get the same performance (horsepower) as you would with premium gas, but modern cars can run fine on any grade of unleaded gas.
What color is premium gas
Absolutely...it will run much worse using non-premium gas.