Of all those hours you'll be shopping, you'll likely spend about 60% of it online
. That's a lot of time for traditional search engines to see what you're doing, and start profiting, by selling your data to advertisers who want you to purchase from them. That means you might not get the most relevant, helpful or transparent search results.
Additionally, you'll be entering your sensitive data (like your contact information, location and budget) into a bunch of different car search sites. That can compromise your identity and private information.