Bmw x5 what type of gas

But, if you can't find premium fuel, I don't think you have to park it in the driveway out of fear you'll ruin the engine. I think the extra gunk comment, is well, just bunk! Originally Posted by rsmamg. I highly suggest not using 87 or 89 octane. For those who say they use it and have not had any problems, be prepared for some down the line.

I work at a BMW dealership as a Warraty Manager, there are some horror stories when a customer uses 87 or 89 octane.

Save a couple cents here and there but you'll utlimately pay the price. The world needs more penny wise pound fuelish people. Second Lieutenant. It used to be detergents were different now those are standard across the board. However your car's compression ratio is around With a lower compression engine say you can use a lower octane fuel due to less heat being created. Since a higher octane fuel doesn't ignite until later in the compression cycle it will withstand a higher temperature.

Putting a lower octane fuel in your higher compression engine can cause knock and detonation, yes you have knock sensors though they cant always catch it in time and you could blow a rod thru the block. Unlikely but ive seen it happen. You'll get more carbon build up as in over time your motor will fill with carbon deposits see image below Now at first ya carbon deposits are normal and can be ok to an extent though after time they will build up to an extent of raising your compression ratio and making things completely different So summary ya you might be saving a couple bucks cause every time you are buying gas though you are spending more since gas milage is decreased, over time causing more harm than good, and if you cant afford it dont drive it.

All times are GMT Obviously you want the ignition system to determine the moment of ignition. Using low octane may cause pre-ignition, which may be noticeable but can cause problems over time for sure.

Not the most scientific explanation but hope it helps people tace care of the car. Originally Posted by MystroX5. Lieutenant Colonel. If you are in a situation where you only have reg 87 it won't hurt. The X5 computer will adjust timing for it. But running it long term can cause damage to the internals and specially if a knock sensor fails I have seen this put pistons in pieces, my grandfathers caddy.

Yes fuel can be tested easily to show you are not running recommended octane and warranties can be voided because of this also read the warranty disclaimer they have one on fuel. My question to anyone why wouldn't you run the 91 recommend??? I didn't buy a SAV to be cost minded or fuel efficient. It cannot be fuel mileage bc the cars knock sensors will retard the timing meaning less efficient combustion of the fuel its self more actual wet fuel going out the exhaust.

So why would you not run it, unless you simply didn't have it available???? Appreciate 1. Nothing below 91, and BMW recommends 89 as the minimum. There are several warning notices in the Owners Manual - probably the Ethanol content is the most important recommendation maximum 10 percent. However, from the manual: NOTICE Fuel that does not comply with the minimum quality can compromise engine function or cause engine damage. There is a risk of damage to property.

Do not fill with fuel that does not comply with the minimum quality. This Shell recommendation sticker is on our week 40 M50i. Attached Images. Originally Posted by vladm. I highly doubt that 87 is of any lower quality than 93 in terms of how clean it's compared to Pump and injectors and overall fuel supply system can not be damaged by a lower octane fuel, only by "bad", contaminated fuel. Here is the kicker fact for you.

The middle grade fuel is actually a mix of 93 and 87, that happens at the gas station. It was mentioned that the 91 octane is mixed at the pump It is blended at the refinery or dispersion depot as 91 octane, the same as with the 87 and 93 octane just before it is put the trucks trailer. There is no mixing at the stations. All chemicals are to be added at that point of blending prior to shipping. Samples are drawn at specific times for testing to verify quality.

Now if this is accepted by BMW or not I'm not sure, but I was told by my stealership, if you use the 91 octane once in a while due to lack of 93 octane, this is fine. But if you're in a situation where there is only 87 octane, use an octane booster at that time. When low-quality or sub-par fuel is used, power levels will drop sharply and acceleration will feel weak. Add any additional stress, such as towing or uphill driving , and you could be looking at a greatly-increased risk of overheating, not to mention rapid and accelerated part wear.

This fuel features a cleaning agent which is specifically designed to prevent the buildup of carbon inside your engine. The cleaning agent will even help remove existing carbon it finds in your engine system too.

This can mean your engine works at peak performance for an extended period of time. It can help you avoid the need for repairs that a dirty engine can cause.