Best Degreaser For Automotive - Choosing the best degreaser for automotive purposes depends on the type of cleaning needed, such as removing heavy oil, grease, or grime from engines, parts, or tools. Here are some top options commonly used by professionals: *. Simple Green Industrial Cleaner & Degreaser 1. Description: A biodegradable, non-toxic cleaner safe for most surfaces. 2. Best For: General-purpose degreasing on engines, parts, and painted surfaces. 3. Pros: Safe to use on painted parts, biodegradable, non-toxic. 4. Cons: May not be as strong as solvent-based degreasers for heavy-duty jobs. # Degreaser Manufacturer.