Way back in the early 70's I had a Ford Consul that on a drive from Thirsk (Yorkshire) home to Wiltshire I stopped at several garages and purchased a gallon of used oil for pence..... I used 10 gallons to get home ... leaving a smoke trial like a world war two smoke laying ship !!
One of the pistons had a hole about an inch diameter in it !!
Got home, filled it with tractor gearbox oil and left it to stand in a layby near a garage I knew .... drove it in there the next morning, whilst still cold, dipping the clutch just as I arrived to coast to a stop.... and did a "deal" on an Austin 1100 ... guy offered me £50 for the consul .... I said I wanted £100 as it was a "goer" ... he said OK as he saw it drive in, never bothered to start it or drive it .... I drove the 1100 home , packed my bags and left back for Yorkshire within the hour .........
It is amazing what we got away with in those days! My smoke trail was so bad that a very keen, for her stripes, female officer stopped me in the A40 and said "your car is making a bit of smoke" (an understatement!
) , to which I said "am I ?" with a grin. In those days there was no law about the blue smoke - if there had of been a lot of vehicles would have been driven from the roads - but she didn't half grill me about everything to do with my poor car and me, a teenage girl! After finding nothing wrong, she stormed back to her patrol car
Often after traveling to the bottom of a steep hill, the cars behind used to disappear in a big cloud of the blue stuff as I accelerated away and the pistons increased the cylinder pressure and pushed out the build up of oil !
Good job Greta Thunberg and her like were not around then
I certainly did my bit back then to create Global Warming!