I am just wondering if anyone has religiously been using a lower grade than 93 octane in their IS250/350 and if they have noticed a difference in gas mileage/performance and or noticed any problems?
I have heard that you can use as low as 87 without any problems however I have also heard the opposite and the dealer states that the car might make some knocking noise's w/ lower octane.
It is understandable that you might get worse mileage with lower the octane but I was wondering if anyone has tried and had good enough gas mileage to make paying less worth it?
Everyone at the dealership said to go with the 87. I did a couple of tankfulls...never again. Premium does make a difference, no matter what the so-called experts say!
The Great Oil Change Discussion
in 07 - 13 Lexus IS250 / IS350 / IS-F
Posted
Everyone at the dealership said to go with the 87. I did a couple of tankfulls...never again. Premium does make a difference, no matter what the so-called experts say!