Higher octane fuel

[badtzki]

I have a question about the octane in fuel. I have a '06 Eddie Bauer Expedition and currently use 92 octane. I use the higher octane because I am allowed to draw gas from the county government for using my vehicle for work. Is using this octane level cause problems for me? Is periodically using lower octane cause problems? Any information would be greatly appreciated. Thank you in advance. :reddevil:

 

[smo0othride]

I just got finished explaining this one to my friend who's addicted to buying those stupid octane boosters for his stock car.
For an engine made to run on 87 gas, putting in a higher octane will not only have no extra benifits, it can also cause negative affects.
"WHAT IF I PREFER TO USE GASOLINE WITH HIGHER OCTANE RATINGS?

You can, but there are no real benefits, other than the gasoline manufacturers making more money off of you. When you use a fuel with a higher octane rating than your vehicle requires, you can send this unburned fuel into the emissions system. It can also collect in the catalytic converter. When you over stress any system, it can malfunction or not do what it was designed to do properly. In the early 90's, an early warning symptom was a rotten egg smell from the tailpipe. Easy fix, go back to using regular 87 octane gasoline. The rude odor usually disappears after several tanks of gasoline. "

http://theserviceadvisor.com/octane.htm

If you google it, all the sights will tell you the same basic thing - put in the recommend fuel and don't waste your money.

 

[2THWTR]

Higher octane fuels don't cause too many problems so much as they are just not neccessary for your truck. The PCM is calibrated for regular fuel.

That said, while modern PCM's can adjust pretty well, using lower octane in a vehicle that requires hi octane fuel can cause problems - especially in performance.