I did an experementing mixing 10%, 20%, 30% and 25% kerosene with gasoline that contains 10% alcohol. 10% kerosene + 90% gasoline the lawn mower engine starts easy and runs very good. 20% kerosene + 80% gasoline the lawn mower engine starts easy and runs very good. 30% kerosene + 70% gasoline the lawn mower engine is very hard to start and will almost will not run. 25% kerosene + 75% gasoline the lawn mower engine it a little hard to start and runs a little ruff. With 20% kerosene the lawn mower cuts down tall grass like nothing. It cuts right through grass it can not cut with just gasoline alone. I took my 1999 Chevy tahoe out on the highway to see how quick it will pick up speed from 0 to 60 mph. I returned home, removed drain plug on fuel tank then put a mix of 20%/80% kerosene/gasoline in the tank. Did another highway test 0 to 60 mph 20% faster. It typically takes a full tank of gasoline to mow my front yard but with 20% kerosene I ran out of gas after mowing about 80% of the front yard. Next I did a mileage test on my 1999 Chevy tahoe. I always text gas mileage when I fill up because I have learned not all gas is equal, so I have learned from expereience that a certain gas stations gives me much better gas mileage that others. I buy my gas at that certain station that always give me about 300 miles on a full tank of gas. Using the best gas that gives me the best mileage 300 miles per tank I added 20% kerosene to do a mileage test. I got 240 miles on a tank of gas. The engine is burning about 20% more fuel and giving me about 20% more power. I have only taken 1 year of high school chemistry and 1 semister of college chemistry. I would like to understand why 20% kerosene and 80% gasoline that contains 10% alcohol makes the engine burn 20% more fuel and produce 20% more power?????