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STP Fuel Additive Question

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Old Sep 20, 2007 | 06:10 PM
  #1  
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iwantanf150
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STP Fuel Additive Question

Well I want to add STP fuel additive to my truck, and I'm just afraid I'll screw something up.lol. Can someone please kindly give me directions. Thanks.
 
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Old Sep 20, 2007 | 06:42 PM
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Buy fuel additive of choice. Bring to gas station. Dump into tank. Fill up tank. Drive away and smile.
 
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Old Sep 20, 2007 | 06:47 PM
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Thanks! So I already filled up, I now have 3/4 tank of gas. Can I dump it in now or is that a big no no?lol.
 
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Old Sep 20, 2007 | 08:12 PM
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FYI...

On these 5.4 3-valve engines be careful. Some of the additives can foul plugs. Did you know plugs aren't warranteed if you used additive or octane booster?
 
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Old Sep 20, 2007 | 08:24 PM
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Waste of money IMHO - unless there is something wrong with the fuel system. But in that case, you should be fixing the problem, not band-aiding a fix by using cleaner.

I look at it this way - a dirty fuel system would cause an increase in emissions. The government does not like excess emissions. This is the same government that would rather poison you to death than have you skip out on the tax for a bottle of booze. So you better believe that if a certain level of detergency in fuel will keep the system clean, they will mandate that level and be happy to let you pay for it.

I've torn apart injectors, carbs, fuel systems, and engines with well over 100,000 miles and never seen a hint that the fuel was causing a build-up. In my own cars, I'm always seeking out the lowest fuel price from what ever station happens to come up and never noticed a fuel system problem in over 650,000 cumulative miles of driving.
 
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Old Sep 20, 2007 | 08:31 PM
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Thanks for the info.b.t.w I have a 4.6L. But that still doesn't exactly answer my question, I have 3/4 tank of gas right now, can I just dump it in?
 
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Old Sep 20, 2007 | 08:40 PM
  #7  
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Also... can I screw up my engine by adding the STP?
 
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Old Sep 20, 2007 | 09:31 PM
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No, Your not going to harm anything with one bottle. If you used it every tankful, 4 times a month, for a whole year, maybe. one bottle, nay, your fine to use it if it may you feel better. Changing you fuel filter is another step that you may want to take, if your worried about your fuel system. There is an article on how to do it on this site.
 
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Old Sep 20, 2007 | 09:35 PM
  #9  
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Oh yeh, you can just add it to your 3/4 tank, no problem. read the Bottle. as long as your in the 10-25 gallon range your fine. Say on the bottle "treats up to xx gallons"
 
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Old Sep 20, 2007 | 09:35 PM
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Has anyone started a list of what will/will not screw up the ethanol sensors in the Flex Fuel vehicles? I was guessing that was one reason they say not to run any kind of additive, just to be safe.
 
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Old Sep 20, 2007 | 10:36 PM
  #11  
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Thanks fishin76! You completly answered my question.
 
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