foxie15

The higher the octane reading of gasoline the higher the resistance to pre-ignition knock. If the engine senses knock it will !Removed! the ignition timing which will cause slightly decreased efficiency of combustion. This leads to lower performance and lower mpg. Because of the computer, no damage to your engine will occur. If your performance or mpg decreases to a point that it is a concern simply go back to mid grade or premium fuel.

All of the V6 engines in Toyota cars are rated for regular gas. They use the exact same engine as a Lexus and they all have a 10.8:1 compression ratio. So who knows why Lexus rates theirs for premium gas. If regular is good for a Toyota then it would be good for a Lexus. I don't buy this idea of I can feel it run better with premium gas.Put someone in Lexus with premium gas and then one with regular gas and then wouldn't be able to tell the differance.

I just bought a used 08 RX350 and when I run the air conditioner for awhile I get a squeaking noise around the radio area. After it warms back up the squeak goes away. Has anyone had a problem like this?