It is really quite simple. Limit your top speed to approximately 80kph or 50mph. Accelerate gently allowing the car to "peak" the revs according to how hard you have depressed the acccelerator before you change gear, especially if towing a caravan. If there is a stop sign ahead or you have to stop or slow down for whatever reason, just lift your foot off the accelerator and allow the vehicle to brake coast / roll under it own power to a stop. Some vehilcles like 4 x 4s may go into a sort of "freewheel mode". This is a practical way to do it unlike boycotting a brand.
You save on petrol, you save on repairs, you save on speeding fines and best of all you don't pay so much tax to the government! They had this policy in South Africa in the 1970s during the fuel crisis. The number of accidents increased slightly but fatalities dropped! Believe me travelling at 50mph is no joke but neither was a very heavy fine plus a jail sentence or even confiscation of your vehicle, a fine and a jail sentence. They were very strict but it worked and kept the price of fuel down! In addition service stations used to close at 1pm on Friday and re-open on a Monday and then doing a few half days during the week.
You save on petrol, you save on repairs, you save on speeding fines and best of all you don't pay so much tax to the government! They had this policy in South Africa in the 1970s during the fuel crisis. The number of accidents increased slightly but fatalities dropped! Believe me travelling at 50mph is no joke but neither was a very heavy fine plus a jail sentence or even confiscation of your vehicle, a fine and a jail sentence. They were very strict but it worked and kept the price of fuel down! In addition service stations used to close at 1pm on Friday and re-open on a Monday and then doing a few half days during the week.