Some cars are fine running on 87 or 89 while others have to have 93 octane. Most people run a heavier weight oil especially if they have a Texas climate
10w-30 or even more sometimes. Synthetic vs nonsynthetic is a huge debate, but most people agree synthetic is better. Don't use synthetic if the car has lots of mileage on nonsynthetic, otherwise it should be fine. Redline a day isn't a bad ...