Heres a pic of Lucas upper cylinder lube/ fuel treatment. It's pretty widely avail. nowadays, go to auto parts stores, I first found it in a truck stop 20 yrs. ago. Not to plug the Lucas co., but I've also used the Lucas oil treat, power steering treat, and transmission treat all w/ good results.
The Lucas fuel treat. comes in 5.5 oz, 1 qt, and gallon jugs. I fill the little 5.5 oz bottle and keep in the car storage area, refilling it from the Qt or gallon size. A note- Lucas fuel treat is like a light oil, and it can creep up out of the qt. size bottle, so find a way to store it held securely upright, I keep a rag around it. The dosage on the bottle is 3 OZ per 10 gallons of gas, there are graduation marks on side of Qt bottle to make it easy.
I'd try, based on my own experience, for 14 gallons of gas total- 7 uncoated aspirin, crushed mixed w/ 4 Oz of Everclear, and 1/2 oz of hydrogen peroxide. I'd put in tight lid jar a few days, shake it now and again, then at station, add 4 oz of Lucas, then filter MPG R thru paper towel or napkin in a suitable funnel to fit the filler neck. Then fill 'er up!
Check tire press. and increase a little if possible and safe/resonable. IT may take a few tanks treated like this to see results.
Good Luck Shahan, let us know how it goes!
Tracy G