Is it okay to mix 87 octane and 89 octane fuel together in my car? Yes. You will not harm your car by mixing different octane grades of the same gasoline providing your car's engine is designed to run on less than 89 octane fuel and you are not using E85 in a non-E85 compatible engine.
It won't make your car perform better, go faster, get better mileage or run cleaner." If your car was designed to use 87 octane fuel and you use 90 octane, it is likely that the engine will not perform better.
Regular gas is lower octane, usually 87 or 88. Putting low octane fuel in a car with a high-compression engine could cause the engine to knock or ping, which could cause major damage if it goes on for a long time.
Can I mix premium and unleaded gas? Yes, drivers can mix the two types of fuel. The combined gas types will result in an octane level somewhere in the middle — something the vehicle “will survive,” according to The Drive.
Always used the recommended fuel grade, usually it's 91 AKI for BMW. If 91 AKI is not available you must go no lower than 89 AKI. It's always better to go higher than lower when it comes to high compression engines.
In a consumer notice, the Federal Trade Commission, notes: “In most cases, using a higher-octane gasoline than your owner's manual recommends offers absolutely no benefit. It won't make your car perform better, go faster, get better mileage or run cleaner.”
Irene Belserion in "The Fourth Guest" Upon this land in which the white angel reigned supreme, a Black Dragon now descends... She is the mother of Erza Scarlet and the creator of Dragon Slayer Magic.
no, he is only really strong when the sun is highest and brightest, he is not immortal though, he can be killed, as you can see when he gets gravely injured during a fight.