Car and fuel saving

A large portion of my monthly expenses goes towards my car. I'm looking for ways to save money. From what I see:

• Bike more.
• Combine trips with other chores.
• Reduce unnecessary driving.
• Do self maintenance on my vehicle such as synthetic oil and oil filter change, tire change, cabin and air filter change, light change, fuse change in fuse box (e.g., to fix cigarettes outlet), cleaning/detailing, made in Lithuania https://obdeleven.com/ OBD2 scanner to read and reset codes.
• Thrifting parts like tools to do maintenance and parts from junkyard.
• Consider alternative mechanics for better pricing.
• Carpool. Consider using carpool apps such as Kangaride or PopARide to reduce driving expenses.
• Brake less often and let my car roll more often when slowing down.
• Get a mechanic to fix rusting, and find quick and cheap DIY solutions if will wait a long time.
• Carwash at home sometimes. Even if just spraying with water, but not too often as to waste water.
• Avoid driving during rush hour.
• Find cheaper insurance.
• Cruise control on highways.
• Use point cards at gas stations, and credit cards that max cashback.
• Lighten car load.
• Don't rev the engine or drive in bad weather.
• Change spark plugs every 100k.
• Don't idle the vehicle.
• Always bring water when leaving the house. Bring food if driving far. Never buy snacks from gas stations.
• Buy gas from places when prices are low.
• Driving a few KMs farther to save a bit of money on gas is usually not worth it imo.

Not owning a car might be the best solution.