I think GM needs to be in "bed with the oil companies " about now!

Hehe!

QuickRick

 

i just started using 93 to see if i get better mpg on my 270 mile a day route. i also played with it a little on my day off . i have no way to prove it , only my opinion that my 08 2.4 auto does not perform as well with the higher octane. there is a slight increase in mpg from 45mph- 68mph. i will continue to test for about at least a week. i may try some 0-60 with a clock. i am very curious about this , i have a high output engine , the owners manual recomends 91 octane. it does not recomend it unless you have the ho engine. i am also curious what the difference is in the ho and the non ho.

 

I could probably look this up but what constitutes the "HO" 2.4? I ran super the first 6 months and have used regular the last 6... I can tell no difference but its not highly scientific. :)

 

The "HO" stands for High Output........which refers to the amount of money to order that engine and properly maintaining it.

 

I know what HO means... I just didn't know there were two different 2.4's. Mine was cheap and hasn't cost me a dime at 20k miles.... :)

 

Relax, Adam.....

It was a joke !!!!

 

Ah, I will nonetheless have nightmare of my engine grenading!

 

Of course it runs smoother..it burns slower....

 

about the different vin codes , and the octane , are in your owners manual. look in the index in the back of the manual for the page # , it is listed on the FUEL page. it is page # 5 - 5 in mine. the 2.4 ho is listed on my window sales sticker , under options - the 2lt preferred equipment group. the 2.2 was standard.

 

I am no mechanic, BUT I used to race cars years and years and years....too long ago...anyway, when we would break down engines we notice a difference in wear and carbon build up on the different engines burning different fuel grades. The higher the octane, the "cleaner" the internal parts as compared to lower octane engines. Not sure if this is still true. I do know this: Engines with SeaFoam added regularly (at oil changes) vs. engines without SeaFoam, had very clean internal parts, in fact, a real difference.