What gas are you guys using? 91 would be best to maximize performance but curious to see if you are using 87 or 89 as well
87 89 or 91
- Thread starter tmarin812
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LamboTexas
Well-known member
On every tank I’ve used it has been 89. 91 is difficult to find anywhere. Performance has been great with 89. When I do find some 91, I’ll probably try just to see if the difference is noticeable at all. I imagine the difference for the price is going be very marginal.
LamboTexas
Well-known member
YIKES!!! I pay $2.89 (89) and $3.09 (91)
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@LamboTexas Please ship gas my way lol
Riverdog
Active member
I've been using the premium most of the time ($4.19/gallon) but I did use 87 for one tank.....didn't notice any difference.
TDCAT41
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I've been running a mix. Meaning....
Filling up on 91 then around half tank would fill up with 87 or 89, then around half tank would fill up 91.
I have a heavy foot and like running in "Sport" most of the time. I have a mix of highway and around town.
Total of 6679 miles at an average 16.5 mpg.
Best was 19.0 average for 650+ miles from NC to IN cruise set at 82mph most of the way.
The 6.2 w/ 10 spd is awesome.
Filling up on 91 then around half tank would fill up with 87 or 89, then around half tank would fill up 91.
I have a heavy foot and like running in "Sport" most of the time. I have a mix of highway and around town.
Total of 6679 miles at an average 16.5 mpg.
Best was 19.0 average for 650+ miles from NC to IN cruise set at 82mph most of the way.
The 6.2 w/ 10 spd is awesome.
I just passed the 500 mile mark on my drive in to work. I assume the dealer filled it with 87. I’m on my first tank of premium (second tank overall).
MPG since new is 17.4 with both grades over 500 miles (probably 325 on the dealer tank). Since the premium full with 91, I’m at 19.0 average and best 50 miles topped at 21.3.
Haven’t noticed much power difference between the 2 but the MPGs have been better. I’m sure as the engine breaks in, a comparison over several ranks of each would be a better data point but it seems to be in line with what I’ve read so far.
MPG since new is 17.4 with both grades over 500 miles (probably 325 on the dealer tank). Since the premium full with 91, I’m at 19.0 average and best 50 miles topped at 21.3.
Haven’t noticed much power difference between the 2 but the MPGs have been better. I’m sure as the engine breaks in, a comparison over several ranks of each would be a better data point but it seems to be in line with what I’ve read so far.
chaos
Member
I haven't noticed any difference between 87, 89, or 91 - or if there is a small difference it's been marginal and the cost is not worth the difference in MPG. What seems to make a bigger difference is using non-ethanol fuel, if available (not easy to find in Iowa..)
I'd recommend calculating miles per dollar. Simply take your MPG and divide by cost per gallon that you paid for that fill-up and compare those numbers. This number is how many miles you can travel per dollar of fuel, and the higher, the better. It is a bit harder than MPG because you have to know what you played for fuel last time, but is a better calculation if trying to minimize total operating cost as it accounts for fuel cost differences.
I'd recommend calculating miles per dollar. Simply take your MPG and divide by cost per gallon that you paid for that fill-up and compare those numbers. This number is how many miles you can travel per dollar of fuel, and the higher, the better. It is a bit harder than MPG because you have to know what you played for fuel last time, but is a better calculation if trying to minimize total operating cost as it accounts for fuel cost differences.
clayshooter
New member
not having any rough idle or pinging with the lower octang fuel.Bobby
Mostly 87 on mine. Some 89 here and there. 4100 miles in almost 2 months of ownership. Can't tell a difference between 87 and 89. Haven't tried premium as the price difference is quite a bit for it.
I have wondered what others were putting in for fuel, though. No one at the dealership said a word about what octane to use when I bought it. I suppose premium is better for the engine long term. But the price difference per tank is tough to swallow. Was thinking of trying premium on a tank soon just to see if there was a noticeable difference in power (not like the 6.2 is lacking in power), but especially in MPG. I doubt there would be nearly enough difference in MPG to offset the price difference however.
I have wondered what others were putting in for fuel, though. No one at the dealership said a word about what octane to use when I bought it. I suppose premium is better for the engine long term. But the price difference per tank is tough to swallow. Was thinking of trying premium on a tank soon just to see if there was a noticeable difference in power (not like the 6.2 is lacking in power), but especially in MPG. I doubt there would be nearly enough difference in MPG to offset the price difference however.
Riverdog
Active member
I switched to 87 when the prices went up last year, haven't noticed any change in mpg or power.
Duramaximus
Well-known member
She's only known 91.
adeerchaser
Well-known member
My local station has 93, that’s what I run In all my auto’s. If on road traveling, always run the highest they have. I will seek out at least 91.
