I try different gas once in a while, true I do feel that my mpg does improve with 92-93 octane, but mostly I run 87. Just when my truck feels like a dog, and I think it need a injection, I empty the tank fill her up with 93 and 104+ octane booster. I can seem to tell a differnece at times... so personally, I think you should use the method of filling your truck that works best for you... Lets face it... Our trucks are our babies. and we do what we can for them.

 

There is no such thing as better gas. Only what your vehicle was designed to use. Think of octane like this. In theory, if you could mix gas with water, you can raise your octain by adding a little water. Lower compression engines, around 8.5:1, need 87 octane because it will ignite faster. Higher compression, 10:1, needs gas that will burn slower like 93 octane or the fuel will ignite like a diesel before the spark is fired. If you use too high of an octane you will find in most vehicles, it will run very rough with a loss of power. The same if you run too low of an octane.

Then you have deisel fuel. No more than lamp oil. Burns very slow, but when compressed 22:1 it has to burn slow or it will ignite way too soon.

Octane ratings at the pump are also not 100% accurate. For example one station will list 87 octane but it is really 86.7. Another station will list 87 but it may actually be 87.2. I use the recommended 87 but the same octane fuel from one station seems to run better than others.

 

Used 87/89 before the Superchip...then upgraded to 91 after the chip. I started using TEXACO gas for 1.5yrs and then have been using Unocal 76 for 1.5 yrs now.

It's wierd, sometimes I fill up in different stations and notice a little bit of power increase when I fill up at a different station. Either that or my truck is just happy that week.

Every once in a while, I throw in Penzoil's SHOGUN injection cleaner.

One thing that I came across in my manual folder is a maintenence schedule booklet that is pretty neat. It shows you when to change what at every certain amount of miles. I think I'm due for a few things that will assure my gas is flowing well and giving me 100% power.

 

Nobody considered how ridiculous this is?

 

I did...

 

Here is the octane that Raoul uses for gas:



Doesn't get any more natural then that...

 

Using higher octane fuel that what is necessary is wasteful and
foolish. You'll gain no benefits from it. All it does it burn slower. The only benefit I see is from an old car in where the ignition timing is so advanced, higher octane is needed to prevent spark knock.

 

Running higher octane is just a waste because your not burning all the fuel and this will actually decrease performance. Unless you have a chip that increased your timing or running NOS,or Supercharger theres no need to use Mid or Premium gas.

 

This is exactly right

The consequences of using a higher octane fuel than that which the engine was designed for far outway the benefits in the long run.

We have fuel stations that offer 91 Oct for the price of 87 Oct. 2 years ago, I used this higher octane fuel for around 6 months. The results were better fuel mileage and an intake manifold that was caked with raw fuel and carbon.

Higher octane fuel burns slower. It is refined for vehicles with advanced ignition timing. When the ignition timing is not advanced enough to complete the burn, the remaining fuel is run through the EGR stsyem as well as the PCV tube and back into the intake manifold. The result is a thick, black goo of fuel and carbon.

After using the higher octane for a while, my engine started to ping in cooler weather. I had to physically clean the EGR, PCV valve and intake manifold. When I pulled the PCV valve (which had been replaced just 1000 miles prior) and the PCV tube, a thick, black mixture of fuel and carbon ran out of the tube. The entire intake manifold was also coated with this mixture, causing the engine to run lean.

Just use the fuel that the owner's manual indicates.

 

use what ever you want fact is the high octane will not harm your engine fuel milage depends on you and your driving the owners man says 87 + and if you only run 89 in it and do your rutine maint. you will find that your truck will last a long time ... at my company we have a fleet of crappy 2000 chevy cavalier cars i hate them they wont die the company only burns 89 fuel and all the cars have 190+ miles on them the grand ams we had before thay had 220000k mi. before we sold them and they still ran
( if i were the boss we would be buying fords)

 

wrong. all gas has some type of additive from the terminal in wich
it's loaded. i do not know of any stations that add there own.
some private, ie plantations, farm, trucking companys add some other additives of there on but ALL have some type added.

 

I tried a tank of 91 octane to see if my truck would perform better. There was 0 improvement in performance. I switched to 89 octane a few years ago because my truck pinged with 87 octane.89 seems to be the right octane for my truck.

 

183321 miles on 2000 f150 xl xtcab, v6 4.2ltr full size bed. zero problems, and runs with more pep, and better slightly better mileage.