I was testing out the digital tach and speedo last night in the diagnostic mode (for those of you who don't know what that is - click here). In switching through all the options, I came across one that said something along the lines of "Premium Fuel - 93 Oct".

I've been running 87 in my truck since I've owned it, and that is what the factory calls for. Why would the dash be saying 93?

Any input is appreciated!

 

TTT - Any ideas? Any other guys show this 93 Octane message when they start in Diag mode?

 

I dont know but they dont even offer 93 oct. in some states. I wonder if these trucks have another tune in the computer that will let you run a 93 tune. I doubt it.

 

I know it - luckily we can get 93 here, but I don't want to run it. I'm hoping this message in the dash isn't an indicator that the truck needs to run on the premium stuff.

 

TTT - anybody?

 

I've gone into the same thing you're referencing and never seen anything about 93 Octane.

I know it doesn't help you, but I just wanted to be a point of reference. I have an 05.

Duke

 

You sure that isn't the 93 code meaning you have a 1/4 tank of gas?

 

^^^ X2 ^^^

No '93 Octane' on the display... '06 model.

A pic would be interesting to see ...

 

Thank you for the replies folks! I went back out and checked it just now with 3/4 of a tank of fuel, and it says "FUEL P 168" so I guess the 93 was just a coincidence. Phew!!

 

That is probably fuel pressure.

 

Fuel pressure at 168? I certainly don't think so...

 

It depends on what units of measure you are talking about. Could be metric-kiloPascals. 168 kPa = 24.38 psi which is well within the range of fuel pressure you would expect to see.