even though they are built here, (about 1.5 hrs* north of me) Jeeps don't even have a Diesel option here (unless they've recently slipped the EcoDiesel into some)
our Regular (in my part of the country, it varies) is 87 AKI, Most stations have a Midgrade/Plus around 89 AKI, and a Super/Premium in the 91-93 AKI range. Around here, 100% of it is 10% Ethanol.
at higher elevations, regular is only 85 AKI, with 87 being the midgrade. and the mid is not a separate product normally, but a blend of the regular and premium mixed at the dispenser.. ethanol content...Varies is the best i can say... E85 is only at a handful of stations in my county, even fewer have E15 (labeled "Unleaded 88")
and one, had an E0 91 AKI for about 9 months... but it's been replaced by E10 93, which is a shame b/c I noticed ~4mpg increase with the E0 stuff.
The Vast majority of stations in my area have a 30 cent spread between the grades, meaning premium is 60 cents more than regular.
Rough AKI to RON Conversion Guide:
This guide is for a rough estimate only. Many factors will contribute:
- 87 AKI = 91 RON
- 91 AKI = 93 RON
- 93 AKI = 98 RON
- 100 AKI = 104 RON
- 104 AKI = 108 RON
*1.5 hrs puts me around the Main Jeep plant in Toledo... but it looks like grand Cherokee's have always been built in Detroit (3 hrs north)..unless yours was made in either Austria, Venezuela, Argentina, China, or Mexico...