2.0 turbo 93 octane - Page 9 - TerrainForum.net: GMC Terrain Forum
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post #81 of 90 (permalink) Old 05-20-2020, 08:35 AM
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Originally Posted by LMG View Post
I didn't see a test kit for $40. Can you provide a link for this?

Blackstone also provides oil analysis and many have used their reliable and detailed reports for years. You can request and receive a free test kit form them in the mail. You only pay when you send your sample in for testing. usually, you get your report within days of sending it in.

The Standard analysis is only $30.
Here is a copy of my first two on my 2015 Equinox .
Note - - this particular test for mine was only after about 3,000 miles since it was winter and had many cold starts, sub zero temps, and from wife's short drives. So I changed it early to get fresh oil in for the rest of winter driving.



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2019 GMC Acadia SLT-1 3.6L LGX V6 - Build Date: 4-11-2019 - Bought 6-22-2019

SOLD - - 2015 Equinox LTZ 3.6L FWD Champagne Silver Metallic *Build Date 1-08-2015 *

SOLD with *38,865 miles 8-15-2019.
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post #82 of 90 (permalink) Old 05-20-2020, 09:00 AM
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Blackstone also provides oil analysis and many have used their reliable and detailed reports for years. You can request and receive a free test kit form them in the mail. You only pay when you send your sample in for testing. usually, you get your report within days of sending it in.
Thanks, JayTee. I have my first sample ready to go for Blackstone Labs. I'm just curious to see what Testoil has to offer as a comparison.
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post #83 of 90 (permalink) Old 05-21-2020, 12:32 AM
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I can say with over 60,000 miles on an 18 LT2 2.0t I have only 91 octane a hand full of times. We get around 23 mph on Chevron 87 octane at 70 mph. I had spark plugs changed at 50k and they looked good a little sooty that I was told from running 87 octane. But plugs easily would of gone 60k no. That's my experience. On 87 Oct I raced a small BMW SUV and all he saw was equinox taillights. At 100 mph I started running away from him. That's my experience with 87 octane.
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2018 Equinox 2.0T LT2 AWD
1999 Dodge 2500 QC 4x4
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post #84 of 90 (permalink) Old 05-21-2020, 08:49 AM
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We get around 23 mph on Chevron 87 octane at 70 mph.

Did you mean 33 mpg? 23 on the highway seems pretty low.


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post #85 of 90 (permalink) Old 05-21-2020, 04:42 PM
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NO. The 2.0t gets that.. I wish 33 mph.

2018 Equinox 2.0T LT2 AWD
1999 Dodge 2500 QC 4x4
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post #86 of 90 (permalink) Old 05-21-2020, 09:49 PM
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NO. The 2.0t gets that.. I wish 33 mph.

23mpg highway is amsutly terrible for the 2.0t. iím at 52k miles and iíve logged 49k of that with fuelly and iíve never had an all highway trip with under 26. several tankfuls have been over 30mph. my overall average is 24mpg but my driving is about half city and half highway and iíve towed a bit which drops the mileage a lot. i average just under 20mpg towing in the highway but my 2018 is one of the ones that keeps the vehicle out of 9th gear when in to haul mode, others have said that they can use 9th gear in tow haul mode... difference in programming i guess and the dealers iíve talked to arenít sure which way itís supposed to be. 99% of my gas has been bp 89 octane and some shell 89 octane. the first 5k miles i played with different octane and 87 definitely showed a few mpg loss and it didnít feel like it ran as smoothly or had the same amount of power. 93 octane didnít seem to show any mileage gain and i couldnít notice a difference in power. We donít have 91 around here so i wasnít able to test that. The only time iíll run 93 now is of i know iíll be towing. Hopefully only buying top tier gas pays off with less carbon deposits in the long run. Either way if youíre only seeing 23mpg at a steady 70mph, you are either using inferior gas or thereís something mechanically wrong with the vehicle.


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post #87 of 90 (permalink) Old 05-21-2020, 10:37 PM
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It is not about mileage. Small motor with turbo is always high octane. Not worth the risk of overheating the turbo by running lower octane. If you have had turbo motors before you know this. Also multiple valves generally require high octane. Go with manufacture requirements. Once again, just opinion.
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post #88 of 90 (permalink) Old 05-21-2020, 11:25 PM
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It is not about mileage. Small motor with turbo is always high octane. Not worth the risk of overheating the turbo by running lower octane. If you have had turbo motors before you know this. Also multiple valves generally require high octane. Go with manufacture requirements. Once again, just opinion.

not to start a debate but the manufactures requirement for the 2.0t in the equinox is 87 octane. they recommend premium but the required minimum octane is 87. itís a 4 valve per cylinder motor, the same as all gm 4 cylinders have been for the past 20 years and most of them did not require premium so the multi valve thing isnít a reason for higher octane. the reason for higher octane is the higher final compression ratio or high boost levels. The LTG 2.0 in the equinox is detuned compared to when used in the cadillac ats or the buick regal gs. gm requires premium in both of those vehicles but they also make an extra 25-30 horsepower with the same exact motor and turbo. Supposedly by detuning it and through the use of knock sensors to retard timing itís supposed to be ďsafeĒ on 87 octane in the equinox...They wouldnít have sold nearly a many ďeconomy ď suvs if they *required* premium. I chose to run mid grade all the time unless iím towing in which iíll run 93 when the vehicle will be under the most load.


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post #89 of 90 (permalink) Old 05-22-2020, 09:49 AM
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23mpg highway is amsutly terrible for the 2.0t.

I agree, I don't remember ever seeing mileage as low as 23 when driving 70 mph.
At 70 mph I get around 30 mpg.
Most of the time I run 91AKI non ethanol. I can't buy 93 in our town.


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post #90 of 90 (permalink) Old 05-22-2020, 08:57 PM
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Agreed! I did forget to mention the higher compression. Thank you too for pointing out the detuning. That makes a lot of sense. No argument necessary as I find value in all opinions on the blog. Especially when quality knowledge is imparted.
What about mileage though? Higher octane or lower? Guess that with so many different driving conditions these figures will vary. Also for us in Colorado the higher octane probably is beneficial for turbo longevity. At least from past experience.
I am just glad to run the v-6 and not be concerned with a turbo.
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