I have tried platinum, turbonator, magnets and also fuel concepts. I have absolutely no improvement in fuel economy. Can anyone tell me if they have tried halo spark plugs, or any product that would improve mileage? I consistently get 12 miles/gallon in town and 14 on highway. It is 4 x4 with 5 speed manual.
I need help to decide what to try next.
Possibly a taller, skinnier highway tire to give you a taller gear ratio end result.
Pull out the front driveshaft until you absolutely need 4WD...if it is a slip yoke and won't leak.
Get out any extra weight...even the spare...carry a plug kit for flats.
Can you start out in 2nd gear instead of first...that helps sometimes.
Tonneau cover for the bed for better airflow.
2006 Jeep Liberty CRD...Founder of L.O.S.T.
OME 2.25" Lift w/ Toyo Open Country HTs 235/75/16s
ASFIR Alum Eng/Tranny/Transfercase/Fuel Skids
2002 Air Box Mod...Air Tabs (5) on Roof...(3)each behind rear windows
Partial Grill Block with Custom Air Scoop and 3" Open Catback Exhaust
Lambretta UNO150cc 4 Stroke Scooter
Ford 5.0, now thats a classic engine. How many miles on it? What year? Any trouble codes? Have it scanned for hidden ones that don't actually throw the light.
Check the distributer timing and maybe bump 2 degrees
Sparks plugs (most on here will suggest OEM)
Check your plug wires with an ohm meter , they should be less 1000-3000 ohm's per foot.
Is the EGR dirty?
Is the PCV working?
What shape are the cats?
How is the alignment?
Are the brakes dragging? Jack it up and spin the wheels.
How are the wheel bearings? (I strongly suspect that given the fine tolerances involved that cheap bearings could be more inefficient)
What tire are you running? A highway radial would be best something that allows around 50lbs pressure or better.
02 Saturn SL
for pics click the link below