Rated HP on the 07 5.3 Engine?

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hmoobsupra

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Anyone know if the rated 320HP is based on regular 87 octane or 91 octane for the 5.3L engine?
 

hmoobsupra

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Thanks....since some manufacturers do disclaim that the stated HP is based only on premium gas...
 

JRTV8

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You're Welcome. :Chevy: on the chevrolet.com site it says Regular 87 Octane Where else did you see this info about 91 Premium?
 

hmoobsupra

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My first domestic purchase so I don't know too much about them but have seen it stated on some foreign cars..talking about ones that can use regular and not just premium.
 

JRTV8

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Oh I see, yeah I used to own a C280 1999 Mercedes Benz and it only takes Premium, but these vehicle can take Octane 87 or + :thumbsup: The only other vehicles that take Premium 91 are the Corvettes, Escalades and Denalis.
 

73shark

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Be aware that putting anything higher than 87 octane in your new Tahoe has the singular effect of just emptying your wallet faster. :eek: Has no effect on performance unless you have changed your computer with a programmer like a Superchips. :thumbsup:
 
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