which fuel to use?

[PG01]

have you had a different user pic every day this week?

Its great ,right?

 

[Cattivo]

have you had a different user pic every day this week?

Gotta mix it up lol

 

[HiHoeSilver]

I've been using 89 from Costco. no issues. something I have noticed, my exhaust sounds badass is it possible previous owner modded it? I raced a stock 2010 yukon the other night and left them in the dust and their exhaust sounds like a normal quiet stock exhaust.

It's possible the previous owner did lots of things... climb under there and look.

 

[Kenny D]

I've heard not to run Shell gasoline because it will screw up your sending unit. There is plenty on the webz to make you believe it.

 

[2011SSVHOE]

Top Tier gasoline refers to the company that refines it, not the Octane rating. This means less than it used to, but there used to be a very noticeable difference in Cheap (dirty) fuel from somewhere like Murphy's, and a Top Tier like BP.

running top tier fuel through every now and then CAN help clean, if the specific refiner has added detergents to do that. Otherwise buy a good fuel treatment, and do it every 3k miles or so. I use Techron every 3k.

that being said, I swear my truck runs better on 89 than 87 with an improvement in mileage, but it goes back down with 93. Once I ever get it tuned, I'll tune it to premium.

All the fuel comes through the same pipeline, just google colonial pipeline you'll see what I mean, the different fuels are separated by water that the operator sees through a sight glass gas is gas!!!!

 

[slick2500]

why is that? what does E85 has that will clean everything up pretty good?

Ethanol. It's basically what is in most fuel system cleaners. Some just use different types of alcohol.

Sent from a galaxy far far away.

 

[slick2500]

Top Tier gasoline refers to the company that refines it, not the Octane rating. This means less than it used to, but there used to be a very noticeable difference in Cheap (dirty) fuel from somewhere like Murphy's, and a Top Tier like BP.

running top tier fuel through every now and then CAN help clean, if the specific refiner has added detergents to do that. Otherwise buy a good fuel treatment, and do it every 3k miles or so. I use Techron every 3k.

that being said, I swear my truck runs better on 89 than 87 with an improvement in mileage, but it goes back down with 93. Once I ever get it tuned, I'll tune it to premium.

I had a 2001 Grand Prix GT that was like that, 87 and 91 octane I would get about 24 mpgs, with 89 I would get 26 going down the highway.

Sent from a galaxy far far away.