You should use 91 or better or will result in knocking.
91 octane, says right in the owners manual.
yes only use what the car recommends. anything less and the engine will knock, anything more and you will only be wasting money, high performance gas only works with high performance engines.
This car is recommended for 91 octane
91 octane or higher it actually depends on how out your engine block gets but most cars use 87 octane, unless your car is running hotter th 200+ degrees you dont use 91 octane, your car would loose power from running to rich
Use exactly what the manufacture recommends. If it is 87 octane then use 87. If it requires premium 91 then use 91. The use of a higher octane fuel than needed is a total waste of time and will provide no benefit whatsoever.
On a 2008 finely engineered car like Mercedes, I would use the high or middle octane- not the lowest. Don't use the lower octane if you hear it knocking under acceleration; however I think the engines are electronically regulated not to knock.
New cars with knock sensors to adjust ignition timing can run on lower-octane fuel, but you lose power.
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.
no it will not as long as they are both pure gasoline.
For a 1991 Lincoln Town Car : " regular " unleaded gasoline , 87 octane
87 octane. I have a 2.5L with a turbo and use 87 octane. I don't notice any difference and the car runs fine.
I have a 98 3.5 rl and the manual says to use gas with an octane rating of at least 91.