Ethanol in our 4.0's

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Jan 31, 2019 | 02:53 PM

RocketMouse

Thread Starter

CF Veteran

Joined: Nov 2017

Posts: 2,478

Likes: 275

From: Southern Texas (former AZ & Aus)

Year: 1999

Model: Cherokee(XJ)

Engine: I6 4.0L

Ethanol in our 4.0's

Hi all.
Just curious, has anyone seen any research or info on the possible negative affects of this new era of fuels with the 10% ethanol content "blend" with older motors like our 4.0s ?
And/or if there is a good way to help combat this for extending their life as I'm guessing they were not designed to burn that stuff.

Jan 31, 2019 | 06:25 PM

jpz

Senior Member

Joined: Jul 2013

Posts: 524

Likes: 99

From: PA

Year: 2000

Model: Cherokee

Engine: 4.0

We have had Ethanol in my area for years. Cant' get a way from it. I have yet to have any issues with any of my vehicles due to it. For any of my vehicles that sit with gas in them for extended periods of time I use the blue Sta-bil which is for Ethanol gas.

Jan 31, 2019 | 11:07 PM

GreaseMonkey17

Senior Member

Joined: May 2017

Posts: 645

Likes: 34

Model: Cherokee

There is no ill effect you need to worry about and all Jeep models from 1986 on are e10 compatible . The only thing you might worry about it in is winter storage in your lawn mower , weedeater , generator , boat etc it doesnt store near as well as old gas and tarnishes etc faster than non ethanol gasoline . You likely won’t have any issue over just winter storage I never do ... but if you’re concerned drain your gas prior to storage or long periods of sitting .