I have a 2012 bmw 528xi n I use unleaded plus (89) would it mess with my engine or car if I Go up a gas grade and use 91 premium?
- 5 months ago
No, that improvement will not harm the engine. You will pay about a dime more for it.
- regeruggedLv 75 months ago
It would not harm the vehicle. You might get slight better performance, but at a cost.
- thebax2006Lv 75 months ago
If your motor isn't pinging when going up a hill while accelerating don't waste the money on higher octane gasoline.Source(s): Mitsubishi Master Tech
- Grandpa JackLv 65 months ago
I believe BMW recommends no lower than 89 octane fuel in your car. The truth is, it will run/drive exactly the same under almost all conditions on either 89 octane or 91 octane fuel. If you re not regularly driving the snot out of the car (pedal to the metal all the time), you might as well save your money and buy the cheaper 89 octane fuel because the engine can and will run just fine on it.
At best, you might notice a very, very slight difference (increase) in power output at full throttle if you re using the 91 octane in your particular engine, but don t expect to feel much of a difference AND it s highly unlikely that any fuel economy gain you might see from using 91 in your engine will even begin to offset the additional cost of filling the tank with premium fuel instead of the mid-grade. In fact, the fuel economy may well not change/improve at all.
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- KY-ClayLv 75 months ago
Premium unleaded is (required) in your BMW 5 series. Your owners manual will tell you if you are required to use 89 or 91 octane. Use only whatever BMW requires.
- RickLv 65 months ago
The higher the octane, the bigger the BOOM, BUT the slower also, so any octane change has to come with a timing change ....................
- 5 months ago
It would not mess with the engine. It would just mess with your wallet. Increasing the octane of the gasoline you choose will do nothing.