 That'll do it. And also coolant. Coolant is the deadliest enemy of an oxygen sensor. A tiny little amount. If you're adding, let's say, one pint of coolant to your vehicle every two months, that is enough to ruin an oxygen sensor. Because it's like when we were kids and learned the first time to not spray light bulbs with the squirt gun because they'd explode. Same thing happens in an oxygen sensor. That element in there...