The car is a '98 Olds Intrigue with 98,000 miles. Since about 75,000 miles I’ve spent extra money to have oil changes that were represented as better for cars with higher mileage. Based on your answer, though, I’m guessing that maybe I needn’t have spent that money. More importantly, it sounds like changing brands of motor oil now isn’t going to harm the engine or cause engine leaks. Right?