[SuBXeRo]

go and read your manual. It states in there that they recommend premium but never to put anything lower than medium grade in. So if you want to cheap out buy medium grade. Regluar grade has a very good chance of causing engine knock. I replaced my knock sensor before it had a chance of going bad and its a *****. I had to have my mom put the sensor in because my hands were too big to fit under the manifold.

As stated before your car is an infiniti not a toyota. Your car was NOT designed for regular gas, it was desgined for 89 or 92 octane. IF gas prices are an issue and u absolutely cannot spend th 3.50 extra, trade it in for a honda civic.

I have put in medium grade many a time and she still purrs. I do a ****ton of highway driving and my car is aging, i always put in premium unless the station just happens to be out of it. If they are out of medium i drive to another gas station.