If your car requires higher octane fuel, feed it higher octane fuel. In other words you'll be replacing the engine. Knock can cause anything from bent connecting rods, cracked pistons, a fractured crankshaft, and damage to the engine head and block. Using a lower octane fuel can cause your engine to knock, which is when a low octane fuel is compressed to the point it explodes before the piston has fully finished its stroke. For the RDX you should absolutely use 91 or higher, and only resort to a lower octane if no other fuel is available. If running a lower octane fuel the engine will take in less air to ensure full compression at the expense of power output. Most modern engines will adjust timing and air intake to account for various octane levels and their corresponding compression capacities, typically ranging from 87 to 93 in the US. It has nothing to do with how 'premium' a car is or whatever marketing an oil company uses to sell a more expensive product to those who don't know better. exploding from pressure rather than spark). Under lab conditions, it tested a Honda Accord along a test track at 65. While a tank of premium may help an engine in other ways, using premium fuel once. Therefore, people often think it’ll reduce engine wear. Something that is extremely necessary to understand is what octane level actually means octane is the measure of how much compression a substance can withstand before spontaneously combusting (i.e. Because premium gas has a higher octane rating than midgrade or regular gas, it produces a little more power when burnt. Premium gas costs more and has a higher octane rating.

Accord 3.5 premium gas