Terrible Fuel Economy!

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Apr 9, 2008 | 01:46 PM

#46

Fifty150

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From: The Barbary Coast

The 27 MPG calculation is based upon starting with a full tank, then filling up after the trip, and then dividing the miles driven by the gallons used.

Apr 9, 2008 | 01:47 PM

#47

glc

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From: Joplin MO

I certainly would believe 27, with the appropriate mods and driving with an egg between your foot and the go pedal.

Apr 9, 2008 | 08:50 PM

#48

Fifty150

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From: The Barbary Coast

I am also running OEM 17 inch wheels w/ OEM 235/70/17 tires. No 22 inch rims, or 35 inch tires.

Apr 10, 2008 | 03:16 PM

#49

4.2L_Guy

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From: custer

Quote:

Originally Posted by Fifty150

There are roads here, like the 99 & I-5 in California or the 15 in Nevada, which are flat for very long distances. My local trips which go from San Francisco, across the Bay Bridge, then down the 580 to the 680, and then back to San Francisco from the South Bay, net at 27 MPG: all flat highway miles, driven @ 55 MPH in OD, and no AC. Most of you guys won't want to go that slow or drive w/out your AC.

MODs which helped were:

Cold Air Intake
40 series muffler
Electric Fans
Custom 91 Octane Performance Tune
Tonneau Cover

ok now i can belive you... u said freeway speeds... 55 is not freeway speeds... now i can belive you...

Apr 10, 2008 | 03:35 PM

#50

Fifty150

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From: The Barbary Coast

I don't know if it helps, but I am also running full synthetic fluids. Royal Purple in the engine, transmission, and rear differential. It has been rumored that synthetics increase efficiency.

Apr 10, 2008 | 04:07 PM

#51

glc

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From: Joplin MO

You are lucky to get it UP to 55 on freeways in a LOT of places. You live in the middle of nowhere and the rest of the world can be quite different.

Apr 10, 2008 | 05:01 PM

#52

dirtyd88

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From: Burleson, TX

Quote:

Originally Posted by Fifty150

I don't know if it helps, but I am also running full synthetic fluids. Royal Purple in the engine, transmission, and rear differential. It has been rumored that synthetics increase efficiency.

but after how long does it take for the efficeincy to kick in? after the first change w/ synthetics? or after the first ten??

Apr 10, 2008 | 09:55 PM

#53

Fifty150

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From: The Barbary Coast

You should be able to notice immediately.

Apr 10, 2008 | 10:42 PM

#54

dirtyd88

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From: Burleson, TX

i might actually try that next time...who knows....

Apr 11, 2008 | 10:24 AM

#55

glc

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From: Joplin MO

Amsoil "claims" gas mileage improvements "up to" 15%, but take that with the same grain of salt that you would take horsepower increase claims for a CAI or a catback exhaust, etc.

Apr 11, 2008 | 12:43 PM

#56

Fifty150

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From: The Barbary Coast

Quote:

Originally Posted by glc

Amsoil "claims" gas mileage improvements "up to" 15%, but take that with the same grain of salt that you would take horsepower increase claims for a CAI or a catback exhaust, etc.

At 15 MPG, that claim is totally credible. Imagine going from 15 to 17. If I were a geek with red hair & glasses, I would have to say, "myth confirmed!"

I use Royal Purple & Lucas Oil products + K&N Filter. I've also heard good things about Eneos, Amsoil, Mobil 1, & Red Line. What you use will be up to you. For me, it came down to what was readily available at the time. For simple motor oil, I order from American Muscle @ $6.49 per quart.