The last 2 rides, as my gas gauge got down to around 3-4 gallons left, my engine started bogging down, usually when accelerating at around 4000 rpm in 3rd or 4th gear. I had filled up after the last ride with what should have been a good Premium gas at Stripes (Sunoco) or Circle K (which sells Valero gas around here), both of which I've been using for a long time. The same bogging occurred during tonight's ride= when the tank got down to around 3-4 gallons. I stopped at Wal-Mart and bought a couple bottles of Heet gas antifreeze and added a bottle (Supposed to treat 20 gallons) to the 3 gallons or so left and tried driving home. At first, after adding the Heet, the Slingshot seemed to drive better, but then the bogging returned, now at slower rpms. It was bogging as low as 2500 rpms and it was almost impossible to accelerate to the speed limit. I limped to the nearest Valero that sells a lot of gas in hopes of finding some good gas and filled the tank. Pulled back out onto the Interstate and the Slingshot seemed to be running normally, so I tend to believe I did have some bad gas.
Would folks agree with me that I probably had some bad gas that somehow left some water in the bottom of the tank? Now for the $64 question - How can I dispose of the bad gas once I get the tank down to where it starts bogging again? Could I mix it with some old motor oil and turn it in at a local oil recycling spot (aka, local auto parts shop)?
After experiencing 2 instances of bogging, I'm not looking forward to going through this again and would like to get rid of whatever bad stuff is in the tank.