Does everyone use premium gas with the turbo? - TerrainForum.net: GMC Terrain Forum
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post #1 of 26 (permalink) Old 10-18-2018, 09:36 AM Thread Starter
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Does everyone use premium gas with the turbo?

Just purchased a Denali. Actually have not got gas yet. What is everyone's thoughts on using Premium Vs mid-grade gas? Thanks

Frank Coletto
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Denver, NC
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post #2 of 26 (permalink) Old 10-18-2018, 12:07 PM
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We use 89 for around town driving and 92/93 when we're going to do mostly hwy driving. Haven't noticed any problems when using 89, but the wife drives most of the time and wouldn't notice anything unless it was really noticeable.
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post #3 of 26 (permalink) Old 10-18-2018, 12:15 PM
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From my understanding you need the recommended 92/93 only when you want to use it at its limit of tow or hp capabilities...
Carrying a few passengers in city and highway should be fine with 87.

there are threads here about how the new engines/ECM etc deals with the different octane values...so no fear of knocking etc.
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post #4 of 26 (permalink) Old 10-18-2018, 05:56 PM
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Originally Posted by fcbubba View Post
Just purchased a Denali. Actually have not got gas yet. What is everyone's thoughts on using Premium Vs mid-grade gas? Thanks

I am assuming that you have the 2.0L right ?

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post #5 of 26 (permalink) Old 10-19-2018, 07:40 AM Thread Starter
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I am assuming that you have the 2.0L right ?
Yes I do

Frank Coletto
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post #6 of 26 (permalink) Old 10-19-2018, 08:57 AM
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I got the 1.5 with the turbo and I run 87 regular without exception. I have all the power I need (especially compared to the slug that was my old Rav4) and my lifetime fuel mileage is 30.8 mpg.


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post #7 of 26 (permalink) Old 10-19-2018, 09:17 AM
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We have a 2018 SLT with 2.0T. For the first 9K miles we used 93 octane gas. The last 6K miles we have used 89 octane.
Our average MPG on 93 was 24/25 and the MPG on 89 octane has been 25/26. We haven't noticed and difference in performance and our gas mileage has been slightly better. Our driving has been fairly even between city, highway, and interstate. Our next fill up will be 87 octane and we will try that for awhile.
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post #8 of 26 (permalink) Old 10-21-2018, 02:29 AM
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I've been using 92 octane since I bought my 18 Equinox in late June. I've considered running mid-grade but I usually buy gas at Costco and they only offer regular or premium.
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post #9 of 26 (permalink) Old 10-21-2018, 03:00 AM
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I've been using 87 in my 2.0 Turbo after the first two tanks. Overall fuel mileage is at 25.8, with mostly short trips with stop and go. When I do need to accelerate quickly, I haven't noticed any real difference from the first two tanks.
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post #10 of 26 (permalink) Old 10-21-2018, 06:51 AM
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I've been using 92 octane since I bought my 18 Equinox in late June. I've considered running mid-grade but I usually buy gas at Costco and they only offer regular or premium.

You can "make" your own mid-grade gasoline by alternating your fill-ups between regular and premium.
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