What product is recommended for removing fuel varnish from a throttle body?

Aerosol throttle cleaner is specifically designed to remove deposits, including fuel varnish, from components like the throttle body. This type of cleaner typically contains solvents that can effectively dissolve and clean fuel-related residues without harming the throttle body's materials.

In contrast, a fuel injector cleaner is primarily formulated to clean the fuel injectors and may not be effective for cleaning the throttle body directly. Engine degreasers are meant for heavier grease and grime but might not be suitable for the specific type of varnish found in fuel systems, as they can be too harsh and could damage sensitive components. Multi-purpose lubricants are not formulated for cleaning and could leave a residue that might interfere with throttle operation. Therefore, using an aerosol throttle cleaner is the best option for effectively and safely removing fuel varnish from the throttle body.