Is it really necessary to use premium fuel in a 2003 Acura MDX?

Answer 1

It is best to use the fuel grade that the manufacturer suggests in the owners manual, Lower grades will void warantee (this is actually in most cases A SCAPE-GOAT), If you want to run A lower grade fuel, Run the tank below A quarter tank on the gauge, Then put A little over A half tank of 87octane in (so you can premium it back up if needed) Then take it out on the highway get it as warm as it will ever get (I am not saying to HOTROD it) Then go find the biggest hill in your area, turn off radio, turn on AC but leave fan on LOW, you want it to be Quiet in car, Get going up the hill, Give car some throttle, listen for any PINGING or KNOCKING sound in ENGINE, If it makes noise put premium back in, If its As quiet as normal Your good.,,,,,,, FYI, OCTANE does not indicate that fuel is extra powerful, It is THE RESISTANCE TO BURN, They use high octane in high compression engines, because it is less likely to SPARK KNOCK,,,,,,,,,,Also, It is used in JET AIRPLANES to keep down the chances of A fire.