Best / Recommended Octane

Regular or Premium Fuel for the 6.2?

Hopefully this is the right location for this post. If not, apologies in advance.

Put simply, does the 6.2 (in a 2011) need premium (91 in California) to make its full power rating or do you get the full monty with regular (87 in California)?

I ask because I have heard various things on the subject. Most prevalent is that either fuel can be used, but the computer backs off the timing a bit if you're using 87, yielding a reduction in power to 401 hp, whereas you get the full 411 when you run 91. Conversely, most reviews I have seen publish the fuel requirement as "regular unleaded."

411 HP is on 93 octane. Recommended fuel is 87. IIRC Either way 10hp in a 6000lb isn't gonna do much.

Thanks, and I think you're right--I doubt I'll notice 10hp in a 6000lb truck.

Agreed, kglesq. If it makes you feel better, run it. Likely an added expense for little gain. JMHO.

FSM

Given that we're buying the same truck but for the color...I suggest we perform a scientific test.

Droid said:

Given that we're buying the same truck but for the color...I suggest we perform a scientific test.

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black is the fastest...everyone knows that

Quit messing around with 91 or 93 and add the only performance mod that counts!!!!

LVdezertdawg said:

Quit messing around with 91 or 93 and add the only performance mod that counts!!!!

Click to expand...

Holy Crap! Is that a Stage IV Hula Girl?

I have been using non ethanol premium 92 here in Oregon. Running at sea level. Vroom vroom

Premium is $.20 more expensive here than 87 octane. 20 gallons x $.20 = $4.00 per fill up.

No brainer there....mine gets the good shit!