Our trucks aren't programmed to take advantage of higher octane, are they...

I know all the tuners (and I've emailed 5Star about this) say they can pick up power and timing up to 93 octane, and I've watched my own OBD scanner show the engine pulling MASSIVE amounts of timing to keep the engine alive on 87.

but the stock computer won't try to add any more timing, based on knock sensor info, if we feed them higher octane gas?



Just trying to double-check things.

 

nope

 

No. The truck is spec'd to run on regular gas. You may get a little bump in power if you have a Flex Fuel equipped truck.

 

The answer really depends on the MY of your truck and the exact motor you have in it.

My '17 5.0L is a true flex fuel vehicle. It can take 87, 91, 93 and E85 - or any mix/combo one desires (though they say to empty a tank before changing flavors).

That said - break out the owner's manual (unless you've tuned your motor) and go with what that says. There may be fine print (like towing) but in general, 87 is what you should be running....

 

(I kinda figured posting this in the 04-08 section, and having the rest of the info in my signature would take care of that. )

 

Tried that last winter, 'Beast Mode' was in effect. Might try it this summer, in the heat and commuting. That might be even more beastly, 'cuz the heat is killing the go-pedal right now.

 

E85 will cure most of the pinging associated with heat. That was probably the reason you felt some more pep

 

Trust me, there wasn't much heat last February in MN.

 

hahaha true that.

 

LOL - I did see that, though there are folks that get different trucks and forget to update their signature. Plus, I didn't know if you had it tuned... I was actually expecting a seafoam discussion.. hehe