1. CarFax: CarFax is a comprehensive vehicle history report service that allows car enthusiasts to access information about a vehicle's history, including accident reports, service records, and previous owners. This app is essential for those in the market for a used car.

2. GasBuddy: GasBuddy is a popular app that helps drivers locate the cheapest gas prices in their area. The app also includes a trip cost calculator and a feature that allows users to report gas prices in their area, helping others save money on fuel.

3. Torque Pro: Torque Pro is an advanced car diagnostic tool that allows car enthusiasts to monitor and analyze a wide range of vehicle data, including engine RPM, fuel economy, and fault codes. The app also includes customizable dashboards and real-time performance monitoring.

4. Hagerty Drivers Club: Hagerty Drivers Club is a membership-based app that provides access to a wide range of exclusive benefits, including discounts on car rentals, insurance, and automotive events. Members can also access a network of other car enthusiasts and connect with them through the app's social features.

5. Bring A Trailer: Bring A Trailer is a popular auction platform that specializes in classic and collector cars. The app allows users to browse and bid on a wide range of vehicles, as well as connect with other car enthusiasts through the app's community features.

6. Carista: Carista is a mobile app that allows car enthusiasts to customize and modify their car's settings, including performance, lighting, and sound. The app also includes a range of diagnostic and maintenance features, as well as a community forum for sharing tips and advice.

7. Roadtrippers: Roadtrippers is a planning and navigation app that helps car enthusiasts plan road trips and explore new destinations. The app includes a range of features, including trip planning tools, suggestions for scenic routes and attractions, and reviews from other users.

8. My Garage: My Garage is a virtual garage management app that allows car enthusiasts to keep track of their vehicle's maintenance and repair history, as well as set reminders for future services. The app also includes a range of customization options, such as adding photos and notes to each vehicle entry.

9. AutoTrader: AutoTrader is a popular app for buying and selling new and used cars. The app includes a wide range of search filters, allowing users to find the exact make, model, and year they are looking for. The app also includes features for managing alerts, saving favorite listings, and communicating with sellers.

10. Rev: Rev is a community-driven app that allows car enthusiasts to connect with other like-minded individuals, share photos and videos of their vehicles, and join groups based on their interests. The app also includes a range of features for organizing events and meetups, as well as participating in contests and challenges.

In conclusion, these top 10 mobile apps for car enthusiasts provide a wide range of tools and resources for enhancing the car enthusiast experience. From vehicle history reports and gas price comparisons to performance monitoring and virtual garage management, these apps offer something for every car enthusiast. By using these apps, car enthusiasts can stay informed, connected, and engaged with their passion for cars.