When it comes to choosing a good supplier of car fuel filter, here are some things you should consider:

1. Reputation: Look for suppliers with a good reputation in the industry. You can check online reviews, manufacturer recommendations, or ask for referrals from other car owners or mechanics.
2. Quality products: Check the supplier's product quality, warranty, and testing methods. Look for suppliers that offer high-quality fuel filters that meet or exceed industry standards.
3. Shipping and delivery: Check the supplier's shipping and delivery times, policies, and costs. Choose a supplier that offers fast and reliable shipping, with reasonable costs.
4. Technical support: Choose a supplier that offers good technical support and customer service. Look for suppliers that have knowledgeable staff members who can help you choose the right fuel filter for your car and answer any questions you may have.
5. Pricing: Compare the pricing of different suppliers to make sure you get a good deal. However, don't always choose the supplier with the lowest prices, as this may compromise the quality of the fuel filter you are purchasing.

Car fuel filters are commonly made of materials such as paper, plastic, and metal. Here are some details on these materials:1. Paper: Paper filters are the most commonly used fuel filters in cars. They are made of cellulose fibers that trap impurities and contaminants in the fuel system. They are affordable and provide good filtration, but may need to be replaced more frequently than other types of filters.2. Plastic: Plastic fuel filters are typically used in diesel engines. They are made of a plastic casing and incorporate a plastic mesh to filter contaminants in the fuel. They are durable and long-lasting but may not provide as fine filtration as paper filters.3. Metal: Metal fuel filters are commonly used in high-performance engines. They are made of aluminum or stainless steel casings and use a metal mesh or screen to filter impurities. They are robust, corrosion-resistant, and offer high filtration efficiency. They are also more expensive than other types of filters.There are also hybrid fuel filters that combine materials to achieve better filtration efficiency. For instance, some filters use a paper and fiber material to trap impurities and water in the fuel system.