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Originally Posted by SILVERadoTACOMA
I don't think so, unless you know something I don't.
I searched on the Denali website and could not find anything that indicated that the engine must be run on premium. Typically, if anything other than 87 is required, there will be an asteric next to the HP and TQ numbers. I couldn't find anything like that on the Denali site.
According to the site, msrp should be between 39-42K
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IIRC the epa and hp figures for the GM engine are obtained on premium even though the engine only requires regular. If you don't run premium the computer will simply retard the timing a few degrees, etc so you don't get detonation. The engine will run just fine like this, but then the hp and epa figures no longer apply. Also, it is my understanding that Toyota does the same with some of their engines but I couldn't tell you if the Tundra's V8 is among them.
