Techniques for Squeezing More MPG out of a J

[Big Tone]

The knock offs I was referring to was for the Tire Minders, not the air filter.

[vishesh]

The car is quite heavy IMO. Has anybody ever replaced body panels with aluminum or composite equivalents, or heard of someone who did this? It'd be quite a bit of work, but could take off several hundred pounds and improve fuel efficiency. I've never actually seen or heard of this kind of mod; I just thought it would be an interesting one and wanted to see if anyone has ever done it.

[elwesso]

UNless you had access to free stuff and could do the work yourself, the money spent would most liekly be a wash at best in extra fuel useage...

[driverdriver]

The J already utilizes aluminum. Its built on a welded aluminum chassis and frame.

[VimyJJ]

I got 25.45 mpg out of my last tankful.

[vishesh]

The J already utilizes aluminum. Its built on a welded aluminum chassis and frame.

You sure about that? It seems awfully heavy for having an aluminum body. Isn't curb weight something like 3800lbs?

[robmcole]

Tell me if anyone can figure this one out.

87 Octane = 15mpg89 Octane = 17-18mpg93 Octane = 15mpg

Good Plugs, Replaced air filter, run 35 PSI in tires.

Really odd, and REALLY bad gas mileage.. I justify it by not having a car payment haha. I need to try a new O2 Sensor.

-Rob

[driverdriver]

You sure about that? It seems awfully heavy for having an aluminum body. Isn't curb weight something like 3800lbs?

If I had a scanner that could scan the original sales brochure (I have J30 that's the size of Life magazine) I would post the body frame pic and the paragraph talking about welded aluminum.

[driverdriver]

Tell me if anyone can figure this one out.

87 Octane = 15mpg89 Octane = 17-18mpg93 Octane = 15mpg

Good Plugs, Replaced air filter, run 35 PSI in tires.

Really odd, and REALLY bad gas mileage.. I justify it by not having a car payment haha. I need to try a new O2 Sensor.

-Rob

The only possible explanation I can think of is that the gas company is adding some sort of additive to octane 87 and 93 fuel, it could be etnanol, tactrol, gas line antifreeze or even increased sulphur. It would make a difference in the fuel economy.

[VimyJJ]

Good Plugs,

-Rob

OEM plugs? MAF? EGR? Thermostat? Fouled injector(s)?

[vishesh]

Starting from a full tank, I drove 341 miles (two-day road-trip, mostly highway driving) and had to re-fill 15.775 gallons to get it back to full.

341 mi / 15.755 gal = 21.62 miles/gallon

Not great, seeing as how I was getting around 24mpg about the same time last year. Still not terrible though, given that the car is now 10 years old.

[DominickJ30]

Starting from a full tank, I drove 341 miles (two-day road-trip, mostly highway driving) and had to re-fill 15.775 gallons to get it back to full.

341 mi / 15.755 gal = 21.62 miles/gallon

Not great, seeing as how I was getting around 24mpg about the same time last year. Still not terrible though, given that the car is now 10 years old.

Actually it is great, you will look back at this when you are gettin 17mpg and wish you could have it again.