They forget to mention things that are useful maintenance proceedures.

• Rustproofing all accessible parts
• Use Anti-Rot & Anti-Cracking Coating for tires, hoses, belts, plastic, etc.
  
• Lubricate hinges, door locks, latches
• Clean, lubricate and rustproof brake mechanisms
• Use Engine Clean+Flush with each oil change
• Use fuel system cleaner & additive that cleans and lubricates injectors and water pump and improves MPG.
• Use an anti-wear and anti-rust additive in the coolant.