This Just In... All 2008's must run PREMIUM!

[tomp]

So the 6.2 is suppose to have more horsepower, so either:

-the increase in engine size bumped the compression as they used the same chambered heads
-increased timing
-or both of the above

I bet the first one is the answer and that is an Engineering mishap if they intended on the new models to use 87 octane. Every mechanical engineer knows when you increase bore size that you must also increase chamber size in the heads or compression goes up. Tis bump in compression also provides more performance at the cost of having to use higher octane fuel.

Let's see, they also added electric cooling fans which gave them about 15-18 more ponies. It's not hard to see where the extra power came from...

Hmmmm, I dont know about you guys - but as much as we have to put fuel in these things that extra $7.50 per tank sure will add up. This just made my decision not to buy a new one until the diesel comes out and to keep updating mine until then.

I bet that electric fan setup wouldn't be hard to retrofit on previous models