On a road trip a few weeks ago, I stopped at a gas station in a smallish town in northern Arkansas. The station wasn’t busy whatsoever (I was the only one getting fuel for the few minutes I was stopped) or very well-maintained, but was of a major brand associated with a big oil company, so I figured it was good enough and didn’t want to hunt around for something that looked nicer as I was on the road all day. (Plus I’d never had a bad tank of fuel from anywhere, let alone this major brand.)
I pumped in a full tank (13-14 gallons out of 17) and pulled out. Down the road, I noticed a super strong vibration when the car was stopped in gear (at a stoplight or similar), which mostly calmed when in neutral. The vibration was strong enough that it actually made sitting in the car at a stop unpleasant - the steering wheel was visibly shaking if stopped at a stoplight or something. It didn’t ever stall but it wouldn’t have been a surprise based on how poorly it was running at idle.
I started researching causes of this, and was thinking I had a mechanical problem of some nature.
But by the time I made it home, two tanks and a few days later, it felt mostly back to normal. I ran a few more tanks down to empty and refilled, and used some Techron, and now it feels completely back to normal, with no unusual vibration whatsoever (some six or so full fresh tanks of fuel later, but it took much longer than just that one tank for it to feel back to normal). I’ve made a conscious effort to use busy stations and to run it lower between fills than I normally might to get the last traces of the gas out.
Strangely, the mileage on that tank was on par with the rest of the trip, over 34mpg, including substantial amounts of mountain driving and some city driving, so it wasn’t like I was getting terrible mileage on the fuel in question.
Any ideas what I bought - a tank of watery fuel? Old and super stale gas? E-85? Diesel contaminated fuel?
I pumped in a full tank (13-14 gallons out of 17) and pulled out. Down the road, I noticed a super strong vibration when the car was stopped in gear (at a stoplight or similar), which mostly calmed when in neutral. The vibration was strong enough that it actually made sitting in the car at a stop unpleasant - the steering wheel was visibly shaking if stopped at a stoplight or something. It didn’t ever stall but it wouldn’t have been a surprise based on how poorly it was running at idle.
I started researching causes of this, and was thinking I had a mechanical problem of some nature.
But by the time I made it home, two tanks and a few days later, it felt mostly back to normal. I ran a few more tanks down to empty and refilled, and used some Techron, and now it feels completely back to normal, with no unusual vibration whatsoever (some six or so full fresh tanks of fuel later, but it took much longer than just that one tank for it to feel back to normal). I’ve made a conscious effort to use busy stations and to run it lower between fills than I normally might to get the last traces of the gas out.
Strangely, the mileage on that tank was on par with the rest of the trip, over 34mpg, including substantial amounts of mountain driving and some city driving, so it wasn’t like I was getting terrible mileage on the fuel in question.
Any ideas what I bought - a tank of watery fuel? Old and super stale gas? E-85? Diesel contaminated fuel?