What grade of gasoline do use?

Skyjump136 · **Joined:** Tue Jul 05, 2005 6:50 pm **Posts:** 1633

jason thompson wrote:

Elwenil wrote:

89 Octane is the recommended fuel for the 3.7L in the KJ. Read your owner's manual, lol. It states that the Plus grade can be used for towing, I believe.

89 is middle of the road
87 is low grade and 92 is high
I have been running 87 in my TJ and KJ from day one and all is well

Depends where you live...definitely not the case here.

KW AV8R · **Posted:** Sun Dec 10, 2006 1:17 am

I run 87 octane but here in Colorado that's mid-grade. Regular gas here is 85 octane and Premium is 92. I average about 17mpg city and 19mpg highway. When I use 85, I tend to get a slight engine knock so that's why I've stuck to 87. My vote therefore is for 87 but not sure if that would be accurate.

Tokyojoe · **Posted:** Sun Dec 10, 2006 2:26 am

85 Octane

It is regular for the Rockies due to altitude.

What grade of gasoline do use?

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