Report: Premium fuel is now recommended for most light-duty vehicles
#1
Report: Premium fuel is now recommended for most light-duty vehicles
#3
This article is misleading. Direct-Injection and other factors allow many of today's small turbos to in fact run on 87 Octane.
In fact, here is the official recommendation for the small turbo engine in my Encore GX.....from page 201 of the Owner's Manual.
Driving and Operating 201
Recommended Fuel
Regular unleaded gasoline meeting ASTM specification D4814 with a posted octane rating (R+M)/2 of 87 or greater is recommended. Do not use gasoline with a posted octane rating of less than 87, as this will result in reduced performance and driveability. If heavy knocking is heard when using gasoline rated at 87 or greater, the engine needs service.
GM recommends the use of TOP TIER Detergent Gasoline to keep the engine clean, reduce engine deposits, and maintain optimal vehicle performance. Look for the TOP TIER Logo or see www.toptiergas.com for a list of TOP TIER Detergent Gasoline marketers and applicable countries.
In fact, here is the official recommendation for the small turbo engine in my Encore GX.....from page 201 of the Owner's Manual.
Driving and Operating 201
Recommended Fuel
Regular unleaded gasoline meeting ASTM specification D4814 with a posted octane rating (R+M)/2 of 87 or greater is recommended. Do not use gasoline with a posted octane rating of less than 87, as this will result in reduced performance and driveability. If heavy knocking is heard when using gasoline rated at 87 or greater, the engine needs service.
GM recommends the use of TOP TIER Detergent Gasoline to keep the engine clean, reduce engine deposits, and maintain optimal vehicle performance. Look for the TOP TIER Logo or see www.toptiergas.com for a list of TOP TIER Detergent Gasoline marketers and applicable countries.
Last edited by mmarshall; 07-30-24 at 09:15 PM.
#4
Should be obvious really, I honestly think if 93 was the baseline and we had 95 and 101 as the mid/high grade we could have substantially more advanced engines with higher CR/DCR so we can have even more power and more MPG. Back in the day 85 and lower was a thing with older engines and high altitudes etc, newer stuff should force the standards higher and if E85 wasn't so energy deficient it would be awesome since it also burns extremely cleanly. Irony is it is almost solely used as cheap race fuel
#5
#6
Trending Topics
#8
#9
Economy of scale, same argument was used when 87 was high octane and if nothing else we can just do what we do with E85. That stuff is only cheap because of .Gov interference, it's much more annoying to transport and store on top of it all as well.
#10
E85 is popular and affordable in the Midwest (and probably in your part of Ohio) because it is made from abundant cheap corn grown locally. But the grade used for E85 not the same grade of corn you would want to put on your dinner table.....it is barely fit for farm animals.
E85 also gives poor gas mileage, because the corn-derived alcohol used to distill it only has about 50-60% of the energy contained in an equivalent volume of pure gasoline....and you have to use more of it to produce the same HP level.
Last edited by mmarshall; 07-30-24 at 09:51 PM.
#11
E85 is popular and affordable in the Midwest (and probably in your part of Ohio) because it is made from abundant cheap corn grown locally. But the grade used for E85 not the same grade of corn you would want to put on your dinner table.....it is barely fit for farm animals.
E85 also gives poor gas mileage, because the corn-derived alcohol used to distill it only has about 50-60% of the energy contained in an equivalent volume of pure gasoline....and you have to use more of it to produce the same HP level.
E85 also gives poor gas mileage, because the corn-derived alcohol used to distill it only has about 50-60% of the energy contained in an equivalent volume of pure gasoline....and you have to use more of it to produce the same HP level.
#12
E85 is popular and affordable in the Midwest (and probably in your part of Ohio) because it is made from abundant cheap corn grown locally. But the grade used for E85 not the same grade of corn you would want to put on your dinner table.....it is barely fit for farm animals.
E85 also gives poor gas mileage, because the corn-derived alcohol used to distill it only has about 50-60% of the energy contained in an equivalent volume of pure gasoline....and you have to use more of it to produce the same HP level.
E85 also gives poor gas mileage, because the corn-derived alcohol used to distill it only has about 50-60% of the energy contained in an equivalent volume of pure gasoline....and you have to use more of it to produce the same HP level.
My close friend is a vet who works with farmers and he brought me/explained all the incentive programs and they are hilarious. You get paid more to produce less useful items for the population at large
#13
This has been the case for about ten years. Article is quite late.
Maybe perhaps in the next ten years, things will lower and balance out. In the advent of more hybrids coming, they may not need the extra boost of higher octane gas.
Maybe perhaps in the next ten years, things will lower and balance out. In the advent of more hybrids coming, they may not need the extra boost of higher octane gas.
Thread
Thread Starter
Forum
Replies
Last Post