by italyrulez » Mon Sep 17, 2007 5:08 pm
Many cars can use regular, but you'll notice less power. But before you attempt this, check your owner's manual. If it says that premium is obliged, using regular may void the warranty. If it only says that premium is "recommended," you may be able to give it a shot. I could let the tank get low on gas, then purchase only about half a tank of regular unleaded, or less. See how that feels to drive. Remember that you have to give it some miles to use up the left over premium in the gas line. If you're pleased with teh performance, then go for it. If not, fill the tank up with premium, and let them mix back together.