I'm going to jump in here. I too have done my own mechanic work over the years. I was a shade tree before going into the Army the first time and my first job was as diesel mechanic, and after that I worked for a VERY short time in a Chevy dealer. (I'm no expert) I thought about getting into the fuel injector cleaning business for myself. Charge $50 or so a shot back in the early 90's. Not the stuff you pour into the tank either. The stuff were you shut off the fuel pump and put a pressurized bottle of stuff in the injector rails. Guess what that stuff was? You guessed it Acetone. Maybe what you did cleaned your injectors and valves, that is why the increase. Maybe yes, maybe no. BTW I didn't do it, cause I couldn't afford all of the special tools.
On another crazy note, about walking or rather not walking. I remembered my Grandpa telling me a story about WWII. He got a deferment because he worked in Detroit as a machinist. Well anyhow, they rationed gasoline, but not kerosene. He set up two tanks on his Model T. Start it on gasoline and when it got up to temp. change over to kerosene. I was living in Fenton Michigan right before and during Y2K, about 20 miles south of Flint. GM country, were Mr. Kettering did much research into this. But I digress. I got the brilliant idea to risk my lawn tractor on this experiment. I had barely any gasoline, but got her good and hot, then poured kerosene in it. Not much, about a quart. The gas was almost all gone so there wasn't much of that mixed with the kero. Went and mowed the lawn. In regular grass no problem, but in heavier grass it would bog down and sound like a diesel and black smoke poured out. Hmmm. So I did the research and found out what Mr Kettering did. It turns out that the kero isn't as volatile. Knew that right? The kero wasn't vaporizing completely under load and the droplets that were liquid inside the combustion chamber(liquid doesn't compress) was causing the compression ratio to shoot way up, hence the dieseling. Mr. Kettering blew the heads off many an engine before giving up, trying to run kerosene in a carbureted engine. I'm real lucky not to have ruined my mower
But dumb doesn't stop in the quest for answers. I had a 93 Mercury Grand Marquis. I loved that car, but anyhow, I said OK what will happen if I pour two gallons in it, with the ten of gasoline already in it. I had an electronic dash that told me I had ten. This car had all kinds of electronics on it. It had two O2 sensors, because it was duel exhaust. What happened? Nothing. Ran like a champ, no problems. Had I kept doing it, maybe then.
Long story short
Five gallons of gas to one of kerosene worked without a hitch. Car got 23 MPG Hwy, so that was good for 46 Miles on the hiway. That's a long way to walk.
