You’re thrifty, you’re self-sufficient, you don’t waste money paying for services you can do yourself. Here at WalletPop, we understand that, and we try to accommodate you with tips and advice for doing things on your own — and cheaply. However, there are a handful of tasks or situations when the DIY approach can backfire. You might think you’re saving money by not hiring a pro, but the results could cost you more — sometimes much more — than if you’d just paid for the professional service in the first place. Wallet Pop put together this list to check out. 8. Oil Changes