Which Grade of Fuel Do You Use?

[Megafast13]

Some say they provide advantages, others say the premium does nothing. Which do you use?

[Andy M.]

Re: Which Grade of Fuel Do You Use?

Regular seems to burn faster than premium in the SS. I stick with 89 octane or above.

Andy

[Bill Davidson]

Re: Which Grade of Fuel Do You Use?

Some say they provide advantages, others say the premium does nothing. Which do you use?

It all depends on your engine's compression ratio. Higher compression engines need higher octane fuel to avoid autoignition. If you are not getting autoignition with the fuel grade you are using, then moving up to a higher octane is simply a waste of money.

It's not as simple as saying higher octane is better or worse. It's more of a question of whether or not it is needed for your engine.

[Markus Kleis]

Re: Which Grade of Fuel Do You Use?

It all depends on your engine's compression ratio. Higher compression engines need higher octane fuel to avoid autoignition. If you are not getting autoignition with the fuel grade you are using, then moving up to a higher octane is simply a waste of money.

It's not as simple as saying higher octane is better or worse. It's more of a question of whether or not it is needed for your engine.

Agreed.

Engines are tuned for a specific octane of fuel - running a higher octane fuel than your engine specifies can even be harmful.

Some engines (newer cars) have intelligent computers which will retard or advance timing based on the fuel provided, allowing the use of E85, 87,, 91 or 93 octane fuels to be used in the same car - BUT - most do not.

[Murr1525]

Re: Which Grade of Fuel Do You Use?

Yeah, best to do what the manual says.

Mine just wants regular, some only want higher.

My dad's car has the variable timing for the grades of gas, but not sure if he has really compared the differences.

[J. A. Michaels]

Re: Which Grade of Fuel Do You Use?

Stick to what the manual states. I burn regular.

[Larry A]

Re: Which Grade of Fuel Do You Use?

I use regular, but I use Top Teir Gasoline , which in my case is Shell.

[AndrewR/T]

Re: Which Grade of Fuel Do You Use?

93 in the truck and 87 in everything else.

[Fly Bye]

Re: Which Grade of Fuel Do You Use?



I use aviation fuel.

[Cat]

Re: Which Grade of Fuel Do You Use?

The Fit doesn't like anything but Regular!

Cat :x

[GudniMar]

Re: Which Grade of Fuel Do You Use?

I use 95 octane, which is the standard in Iceland, I also have the option of using V-Power which is 99 octane.

[Bill Davidson]

Re: Which Grade of Fuel Do You Use?

I use 95 octane, which is the standard in Iceland, I also have the option of using V-Power which is 99 octane.

Iceland sure is an interesting country. Well ahead of it's time.

BTW, my grandparents were born in Iceland. I'd love to visit some day.

[Rthario]

Re: Which Grade of Fuel Do You Use?

Twin Turbo BMW = Top Teir Premium. Shell or Chevron only.

Engine de-carb at the dealer is like $500.

[fullbirdmusic]

Re: Which Grade of Fuel Do You Use?

Since I drive a Porsche Cayenne, I get better gas mileage from the Premium grade stuff. It does have the ping adjustment, but I've tried both Super and Premium and the higher octane goes farther (and faster!).

[FRS]

Re: Which Grade of Fuel Do You Use?

Some say they provide advantages, others say the premium does nothing. Which do you use?

Test for yourself and you'll see.

There s huge difference between 91, 95 and 98 octanes here in Australia.

Recently 10% ethanol was introduced here. A car goes like a **** and spends 25% more petrol.

When I compare 91 and 98 on my bikes, the bike is not puling when using 91 .. huge difference.