Using dry gas?

[sceco5]

Shortly after my last fillup, Shell 93, I have noticed a miss or stumble that will sometimes occur while steadlily driving at 50 MPH or so. Or basically while I am not placing and kind of load on the engine, and I do not see this while accelerating or wide open throttle. I am very particlaur at doing maintenace, and the usual maintenace items have been replaced less than a year ago. Since I have heard of other people getting bad tanks of gas, that has led me to look here first before pulling the plugs. Usually I try to keep the tank above half, but I have let it get down to a little less than 1/4 tank the past few times. I don't know if this has contributed to moisture somehow condensating in my tank during the colder weather.

I have never really been a fan of using any kind of additives, but I am contemplating using some drygas in this situation. I have heard before with fuel additives that it is best to do an oil change after the next fill up. I don't know if this is true or not, but if this is the case, does the same apply with drygas?

If it is contibuted to a bad tank of gas, should a couple of refills cure this assuming that they are not contaminated?

 

[chubbs1]

Just wait before you add anything, use a different brand and see what happens over the next couple of tanks. It may be a bad fuel filter or who knows but a different brand of gas will tell you more.JMO.

Matt

 

[beast3300]

Dry gas isn't quite like other cleaner types. You can use something like Isoheet (red bottle, my fav) without having to chain the oil.

The other option is continue to cycle the fuel and it will of course work it's way out. (And add a bottle of Isoheet)

 

[Stu_Rock]

Drygas is a brand of methanol, like HEET. It might help dissolve water if you have some in the tank. If the gasoline has ethanol, it will be of little help since the gasoline will already be able to dissolve small amounts of water. The Drygas will not affect oil at all.

Bad tanks of gasoline do happen. It's happened to me on three occasions. One full refill with good gasoline should take care of a bad gasoline issue, unless it's so bad that it leaves fuel injector deposits.

 

[mongo161]

That's the first time I've read that you need to change your oil after adding a fuel additive.

I run Chevron Techron fuel system cleaner mixed with some 2 stroke Marine TC-W3 at every fill-up.

IMO...I've never experienced any problems. I let my tank run down to almost empty, when I'm on a long trip, and fill it back up again...and again. IMO....When travelling at high speeds on the highway, the fuel system Chevron additive will help push the fuel through the entire system as it breaks down dirt, moisture and any impurities in your fuel tank. IMO... if there is any dirt in the fuel, it will burn up fast when it hits the cylinder with the lubricating properties of the TC-W3 pushing through the fuel system.

So please enlighten me to your problems with running a fuel system cleaning additive and then immediately needing to change your oil? Let me know more.....

 

[Pop_Rivit]

I'm not sure what type of vehicle you have, but I recently had a similar issue with a friend’s 1999 Dodge Dakota. Fuel had nothing to do with it-the culprit was a faulty throttle position sensor.

Your symptoms sound exactly like the Dakota's-stumble at steady speed of around 50 MPH, no other drivability issues, etc.

 

[chubbs1]

Originally Posted By: mongo161
That's the first time I've read that you need to change your oil after adding a fuel additive.

I run Chevron Techron fuel system cleaner mixed with some 2 stroke Marine TC-W3 at every fill-up.

IMO...I've never experienced any problems. I let my tank run down to almost empty, when I'm on a long trip, and fill it back up again...and again. IMO....When travelling at high speeds on the highway, the fuel system Chevron additive will help push the fuel through the entire system as it breaks down dirt, moisture and any impurities in your fuel tank. IMO... if there is any dirt in the fuel, it will burn up fast when it hits the cylinder with the lubricating properties of the TC-W3 pushing through the fuel system.

So please enlighten me to your problems with running a fuel system cleaning additive and then immediately needing to change your oil? Let me know more.....


There are no "problems" so to speak, it's just if you dump some Fuel injector/system cleaner and you have carbon build up it can be cycled into the oil (I'm sure there is a more technical way of saying it). So ideally if you can run a good cleaner through the gas tank a couple of fills before you change the oil you will drain any deposits out of the case, theoretically you will be clean as possible. If you use something that works as an UCL (MMO, TC-W3, RL SI-1,etc.) those can be run at all times.

 

[Cristobal]

I get a bottle of HEET or similar stuff when I go to Northeast Nevada in the winter. For those who think all of the state is like Las Vegas, think again: Ely, Eureka, and Wells routinely see -10 Farenheit in winter, and Ely has seen -28. HEET will dissolve water. There are a few stations in Nevada that sell E-85 and sometimes I will sneak a gallon of that into an almost full tank. That works too. But I dare not use more or it will corrode the inside of my fuel system.