If vehicle does not "ping" severly on acceleration - no advantage
You should be fine with 91 octane. The higher the octane, the more you engine will like it, but 91 octane is enough for your ES 350.
Per the owners manual 91 octane fuel (premium) is recommended. Using a lower octane decrease the performance of the vehicle.
Try using a higher octane gasoline in this ATV. Many times the pinging is due to not using a 91 or higher octane fuel. A lower fuel like 85 or 87 may not be burning off as efficiently as the 91 octane which in turn will cause the pinging.
Yes you can. It will always be cheaper to just buy the 91 octane though so you'd be wasting your money.
absolutely....you can mix any octane with any other octane
A 3vze engine will take anywhere from regular 87 octane, up to 100 octane race gas. However what is your purpose to using higher or lower octane, Using regular, plus, or premium will work well. however higher mile engines would prefer 91 octane!
Use exactly what your owner's manual states. If it says 89 or 91 octane then do not use 87 octane. Using a lower octane that required may cause pre-detonation or what is commonly called (Pinging). Pinging may be harmful and may cause engine damage. Bottom line is to use no lower or higher octane fuel that the engine was designed to run on. Using a lower octane can cause engine damage, and using a higher octane is a waste of money that will provide not benefits whatsoever, and is nothing more than a myth.
91 octane
If you're using 91+ octane fuel then theres no point if your car is stock.It IS possible its still knocking even on 91+ but if you're never push your car, no need to worry. If you ARE hard on the throttle, using 93/94 octane would be ideal unless you can get someone or something to scan.?
( 412 horsepower ) if using " premium " unleaded , 91 octane or higher
91 octane
I asked the Lincoln Mercury dealer about this and they said that for optimum performance I should use a minimum of 91 octane but that lower grades right down to 87 octane regular can be used. When octane grades lower than 91 are used, the ECC (engine control computer) will automatically detune the engine to prevent knock although you will have a slight power loss. Using an octane grade lower than 91 will not hurt the engine.