Ok I found it....I got the same motor. LQ4. I just didn't know what to look for but now I found it. Thanks a lot!
6.0 what grade fuel
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Ok I found it....I got the same motor. LQ4. I just didn't know what to look for but now I found it. Thanks a lot!
Silverad04
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Ive got the LQ4 Denali 2005, and the manual says 87
hoe
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I wonder what the LQ9 Escalade 2005, manual says... can't compare apples to oranges.?
Silverad04
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ya so the LQ9 having higher compression is probably why they recommend the 91 octane. The LQ4 in the denali's would be the same motor as in the 2500 series trucks, which makes sense why it would say 87 octane. I just wish my Denali had the 4l80E tranny. But nowadays it "acceptable" to switch. Or maybe I'll identify my Denali as a Z06 Corvette with twin turbos.
Tonyrodz
Resident Resident
Undercover Z06
deep, deep undercover! Lol
deep, deep undercover! Lol
B0$$MAN
Boss of all Bosses
93 octane for me. If I am in an area that only offers 91 or 92, then I'll do that.
Marky Dissod
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Meathead16
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Not to rekindle an old debate but I wanted to add what I found in my owners manual. This has already been said more or less in this thread but this is right from the horses mouth and just hoping to add some 'official' clarity that can be helpful to some. This is for an LQ9.
SilverSport
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I realize this was mainly for the Escalade and the LQ9 but the owners manual for my 2005 Yukon Denali with the slightly lower compression LQ4 has similar wording for Gasoline Octane
Use regular unleaded gasoline with a posted octane of 87 or higher. If the octane is less than 87, you may get a heavy knocking noise when you drive. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. Otherwise, you might damage your engine. A little pinging noise when you accelerate or drive uphill is considered normal. This does not indicate a problem exists or that a higher-octane fuel is necessary. If you are using 87 octane or higher-octane fuel and hear heavy knocking, your engine needs service.
Bill
Use regular unleaded gasoline with a posted octane of 87 or higher. If the octane is less than 87, you may get a heavy knocking noise when you drive. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. Otherwise, you might damage your engine. A little pinging noise when you accelerate or drive uphill is considered normal. This does not indicate a problem exists or that a higher-octane fuel is necessary. If you are using 87 octane or higher-octane fuel and hear heavy knocking, your engine needs service.
Bill
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