Super newbie question here, but I did a quick search and gave up after seeing 11 pages of results... Sorry if this is a commonly asked question.

I would have preferred to do a poll.... What type of fuel do you guys use? Premium, Mid-grade, or Regular? And why? I am thinking of switching to Premium; after the mechanic replaced my catalytic converter, I feel a loss in power and I want to see if Premium fuel will make up for some of it.

What do you guys think?

 

no need for premium. I use 89 Chevron with Tech

 

i just use reg cause im cheap but only get gas from shell or chevron

 

I use mid-grade from shell. Mid-grade is probably unnecessary, but it can't hurt either, IMO.

 

Gasoline- diesel won't work.


Octane slows combustion--> more of it, slower the burn. If your truck doesn't "ping" (sounds like marbles in a can), then you will see no benefit using higher octane. Its not a situation where if some is good, more is better.

 

I use phillip66 mid-grade because regular here is 85 octane.Who the hell uses 85 octane??

 

Higher altitude uses less octane.

 

i have a chevy 350 in my yota and i have ran all the octanes and it really dont seem to make a difference

 

I use regular, I've onced talked to an auto engineeer about this same topic. He said unless your vehicle is designed to run on higher octane or you have forced induction (turbo, supercharger) then you are just wasting money. Just don't run E85 or you will be throwing a lean code.

 

Wun Wegular.

 

You don't really need to be an engineer of any kind to understand what octane is. It would take no more than a high school education and half an hour on the internet. Then there would be no need for threads like this.

 

Its the power of suggestion, it is. You know like (cold air intake, syn vs dino, sas, on and on.

 

I use regular 87 octane for all normal driving, but when I make the 300 mile drive to LA to visit my girlfriend every month or two I use 91 octane and I swear i get 20 mpg with my 33's only when I use the 91 octane for the long trip

 

I think its called (the Highway) not octane.

 

If your computer is designed to burn 87 octane, it will not know what to do with the extra octane. You will actually get a bit of unburnt fuel leaving more deposits, so you can actually hurt your engine over time with a higher octane.

 

I just use Chevron 87oct. but occasionally use Plus (89oct)

 

Plus here is 87 octane,and Im staying out of the mountains.Guess Im stuck paying more for plus just to get regular octane because Im not dropping down to 85.

 

Lol I just run whats cheapest but the best grade of fuel. My truck wont run on Casey's gas. Really only runs on QT or BP gas lol.

 

Quik water is dog piss,but BP is good..lol

 

ill run plus every so often