San Antonio XJ's
I did when I filled up with the additive but will go back to 87
CF Veteran
Joined: Jul 2012
Posts: 4,104
Likes: 2
From: San Antonio, TX
Year: 1996
Model: Cherokee
Engine: 4.0L
I've used 91 a coue times. Didn't really see a differance so I stay eith 87
Seasoned Member
Joined: Apr 2012
Posts: 272
Likes: 1
From: San Antonio/Houston, Texas
Year: 1988
Model: Cherokee
Engine: 6 cylinder 4.0L
Ive seen more mileage out of the tank and I can feel a little bit more power. But ive talked with some others about their experience and they said they didnt notice anything. I dont know if the HO and Renix have differnt results when it comes to octane levels. Im sure there is some but as to how much I dont know.
Ive seen more mileage out of the tank and I can feel a little bit more power. But ive talked with some others about their experience and they said they didnt notice anything. I dont know if the HO and Renix have differnt results when it comes to octane levels. Im sure there is some but as to how much I dont know.
Seasoned Member
Joined: Apr 2012
Posts: 272
Likes: 1
From: San Antonio/Houston, Texas
Year: 1988
Model: Cherokee
Engine: 6 cylinder 4.0L
Seasoned Member
Joined: Apr 2012
Posts: 272
Likes: 1
From: San Antonio/Houston, Texas
Year: 1988
Model: Cherokee
Engine: 6 cylinder 4.0L
It would be a lot easier if they would make a better cap for the big bottle. I cant leave that in my jeep or truck. They tip over and leak. I got the small bottle with the green cap and carry that with me I just have to remember to fill it up. But that Lucas stuff is really good. I try running lucas in everything if its available. Diffs, engine, trani and fuel. My high mileage is prooving it's working.
I put mine in one of those big clear shampoo bottles that you can buy and carry the nozzle with me. When I first bought mine it wasn't taken care of at all but running Lucas and Royal Purple you would never think it had 250000 miles on it
CF Veteran
Joined: Jul 2012
Posts: 4,104
Likes: 2
From: San Antonio, TX
Year: 1996
Model: Cherokee
Engine: 4.0L
if yall havent done so yet unplug every electrical connection in the engine bay, cleen the contacts up, and spooge some di-electric grease in all the connectors.
i got about 1.5-2.5 mpg from that
i got about 1.5-2.5 mpg from that


