4.7 Fuel Usage

[steelo2525]

I do have larger tyres and a small lift, 245/75/16's and 2" lift.
I have noticed using 95 instead of 91 gives me better mileage, so would that mean 98 would be even better?

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[steelo2525]

Originally Posted by Fishframe

There it is ! When I first got my Jeep 4.0L fuel economy was terrible. Until I changed the plugs ........ the old ones were horrid. I find they need to be gapped properly as well.

Where I get it serviced is an ordinary shop but the boss and 2 other mechanics own Jeeps. It's why I go there.

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[Fishframe]

Originally Posted by steelo2525

Where I get it serviced is an ordinary shop but the boss and 2 other mechanics own Jeeps. It's why I go there.

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Using sites like this, and YouTube ect...., you should upskill yourself to do your own basic servicing like plugs, air filter, oil, oil filter, fuel filter. I find that when I do my own (I’m not a trained mechanic) I do a much better job than any shop. I leave the mechanics for big jobs I can’t handle or don’t have the tools or expertise for.

[steelo2525]

Originally Posted by Fishframe

Using sites like this, and YouTube ect...., you should upskill yourself to do your own basic servicing like plugs, air filter, oil, oil filter, fuel filter. I find that when I do my own (I’m not a trained mechanic) I do a much better job than any shop. I leave the mechanics for big jobs I can’t handle or don’t have the tools or expertise for.

I used to on my old WJ 4.0L but this one I bought with a Warranty for 3 yrs so have to get it serviced every 6 mths or 10 000k's at a shop and get book stamped.

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[steelo2525]

So I should be looking at around the 12L per 100 then as a good average?

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[Fishframe]

Originally Posted by steelo2525

So I should be looking at around the 12L per 100 then as a good average?

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I’m thinking 10’s or a little better for highway and 13’s to 15’s around town.

Spark plugs can make a big difference.

[steelo2525]

Thanks for the answers, I did have a lot better mileage out of it a year ago and it's noticeably worse in the last couple of months.

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