Result of using mothballs as fuel additives in my car (Mercedes-Benz 190E UK model). I have added 4 mothballs in fuel tank (12.1 gallon tank capacity). Total run was 247 miles before refueling. I do different calculation based on amount spend per kilometer. Mix drive city and highway.
Without using mothballs
Average amount per kilometer drive: 0.18 cents
Average amount per kilometer drive: 0.21 cents
Yes, there is no error in my calculation. I lost efficients of 14.29%. Maybe 4 mothballs reduces the efficiency level. I should reduce to 2 mothballs on next testing to check efficiency. Most of the time I drive cars during week ends. It took 2 weeks to refill new batch of fuel. Could it be fuel evaporated during 2 weeks period because of mothball additives? I could feel added power in acceleration and engine smooth running during the entire testing.
Yesterday, I have changed to different fuel additives. Poured in 60mL of acetone (nail polish remover) after fuel refilling (43.30 litre). Rule of thumb 1.5mL acetone for 1 litre fuel. I drove about 200 miles mostly highway drive and fuel meter shows more than half tank full. Still quarter tank to go before refueling.
(Knowledge without action is useless, action without knowledge is foolish)