I prefer to use 93 octane as it is an autobahn tuned vehicle and is a bit sluggish with the customary regular 87 octane (which normally contains 10% ethanol) Hope that helps. It works for me.
93
The 1995 BMW 5-Series has a gas tank that will hold up to 21.1 gallons of gas. The average fuel consumption is 19 mpg country/highway and 28 mpg city.
Grade 93+, your manual should have this info.
Premium 91+
Most BMW Cars Take Unleaded Or For Some Special Ones Diesel.
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.
I've been using regular unleaded in my '92 525i for about the last 2 years ever since the gas crunch and it has been running pretty well. I honestly haven't been able to tell much of a difference, maybe just a tiny bit of sluggishness. It's worth it to me, but probably not to most.
The 2007 BMW X5 is a gas-powered vehicle.
The 2006 BMW X3 is a gas-powered vehicle.
The 2008 BMW M3 is a gas-powered vehicle.
The 2011 BMW X3 is a gas-powered vehicle.