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Hi, We have had our new '18 Envision Premium since May 25th. So far we have 3,025 miles clocked including one vacation trip. I have been using premium and mid grade fuel either Shell, Exxon or Mobil. I know some say you can and some say you can't use regular fuel but was wondering if anyone has been running theirs on it and if so how is the performance? Is it substantially reduced or have you developed pre ignition knocking? Any insight will be helpful. Thanks, Mark
Senior Member
Join Date: Jun 2017
Location: OH-IO!
Posts: 257
The 87 octane will have a slight, noticeable power drop over 92-93 octane. A slight drop in fuel economy and some audible pinging with the windows down.
I've run all grades and currently mixing E85 with 87 octane.
I've run all grades and currently mixing E85 with 87 octane.
2016 Envision Prem ll
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Just a little update. Well, the car is up to a little over 10K miles now and I have tried numerous types (regular, mid and high-grade versions) and brands of gasoline (all name brands, I checked the GM site for authorized brands). I really feel the performance is best with the high octane fuel even though I am not a hard driver. The car is smoother, has more pep and I hear no engine noise (pinging or otherwise). The upside is I generally get about 25-28 all around driving mileage. The downside is the premium that I have been buying is between $1 to $1.20 more than regular a gallon. Shell today $3.549 @10.397 gallons nets $36.90 which included a $.05 savings per gallon with the Shell card. Still, I am spending less than I did when I had the 3.6L V6 and the performance is almost as good with far better mileage so I fill up far less often.
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Senior Member
Join Date: Jun 2017
Location: OH-IO!
Posts: 257
I found the octane matters little for mpg. The 2.0T does have more pep with higher octane.
I've been mixing E85 and 87 octane. I mix 30% E85 and 70% 87 octane for about 93-94 octane. Cold start is good so far at 25°F degrees but mileage does suffer with E85.
I've been mixing E85 and 87 octane. I mix 30% E85 and 70% 87 octane for about 93-94 octane. Cold start is good so far at 25°F degrees but mileage does suffer with E85.
2016 Envision Prem ll
Junior Member
Join Date: Aug 2018
Location: CT
Posts: 17
Quote:
Originally Posted by ATLANTICWAVE1000
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Just a little update. Well, the car is up to a little over 10K miles now and I have tried numerous types (regular, mid and high-grade versions) and brands of gasoline (all name brands, I checked the GM site for authorized brands). I really feel the performance is best with the high octane fuel even though I am not a hard driver. The car is smoother, has more pep and I hear no engine noise (pinging or otherwise). The upside is I generally get about 25-28 all around driving mileage. The downside is the premium that I have been buying is between $1 to $1.20 more than regular a gallon. Shell today $3.549 @10.397 gallons nets $36.90 which included a $.05 savings per gallon with the Shell card. Still, I am spending less than I did when I had the 3.6L V6 and the performance is almost as good with far better mileage so I fill up far less often.
Senior Member
Join Date: Jun 2017
Location: OH-IO!
Posts: 257
How is the acceleration of the turbo-4 vs thr H6? Not sure if there is elevation involved.
2016 Envision Prem ll
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Join Date: Aug 2018
Location: CT
Posts: 17
Quote:
Originally Posted by NormT
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How is the acceleration of the turbo-4 vs thr H6? Not sure if there is elevation involved.
Note that in 2020 Subaru will no longer sell the H6, just the H4 and the H4 turbo themselves running on premium. It is the way the industry is going (the new turbo from Subaru will generate the same power as the discontinued H6, but will weigh less so accelerate faster most likely).
Last edited by SS1; 02-22-2019 at 12:21 AM. Reason: More information
Member
I find the 2.0L I4 in the Buick to be almost as quick as the 3.6L V6 we had in the Equinox. Actually, around town, the Buick feels more sprightly than the Chevy did and on the highway, if you gunned the V6 it seemed to have more punch. In any event, for us, both have more than enough power to manage in town or on the highways.
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Yes, agreed, I have driven the Merritt a million times since driving in 1971. Although very pretty, the short runways on, the short curved runways off and the general winding of the parkway make it a must to pay attention lest you end up in the trees. Definitely, need a car that can reasonably accelerate as well as go up a multitude of highly inclined hills. I now come to the state about once a month to see my mom and find the Buick manages well over this road. We now have 25k miles and so far so good. This is the best car I have ever owned. It does everything I need and does it well, ride, handling, acceleration, braking and we feel extremely safe when driving it.
Junior Member
Join Date: Aug 2018
Location: CT
Posts: 17
Quote:
Originally Posted by ATLANTICWAVE1000
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Yes, agreed, I have driven the Merritt a million times since driving in 1971. Although very pretty, the short runways on, the short curved runways off and the general winding of the parkway make it a must to pay attention lest you end up in the trees. Definitely, need a car that can reasonably accelerate as well as go up a multitude of highly inclined hills. I now come to the state about once a month to see my mom and find the Buick manages well over this road. We now have 25k miles and so far so good. This is the best car I have ever owned. It does everything I need and does it well, ride, handling, acceleration, braking and we feel extremely safe when driving it.
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