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Old 08-10-2014, 03:03 PM   #1 (permalink)
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Join Date: Aug 2014
Location: Indiana
Posts: 2

Lexus - '92 Lexus LS400 V8
90 day: 23.94 mpg (US)
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Hi, new to modding from Indiana!

Hello, I'm a pursuing my degree as an electrical engineer and I drive 100 miles round trip to school on the Indiana toll road. I have a 1992 Lexus LS400 in almost perfect condition. It's got a 4 liter V8 to pull the tank of a car down the road but I get decent mileage out of it and I hope to get even more. Right now in the summer it gets 20mpg town, 21-22 highway. Winter is worse at 19-20mpg highway. Here is a list of what I might do this coming fall semester.

*Vacuum Gauge... I really do have a lead foot right now
*Under Engine cover... I fabricated a stainless steel cover to keep engine heat and snow/salt from the engine.
*Hot Air Intake attachment.. that sucks air after the radiator?
*Inflate tires from 32psi to 38-40?.. IDK I want the ability to dodge highway debris with grip.
*Drive Slower... I use the 5-10mph over posting rule..I'm bad
*Cover Some of the Radiator in the Winter.. Saves gas and a rusted radiator
*Some Engine related maintenance.. PCV leaking.. fuel filter..etc

Right now I have 5w-30 full syn and the 180,000 mile engine loves it. I'm not looking to go balls out on mods, I'm on a really nice budget for school and so 20 mpg gas money is not alarming to me. It's just that I drive 100 miles a day to school and little savings adds up real quick. Using excel spreadsheet estimating # of trips each semester, it's around 8500-10000 miles per semester!

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Old 08-10-2014, 04:30 PM   #2 (permalink)
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Join Date: Oct 2009
Location: Texas
Posts: 3,523

The Q Sold - '02 Infiniti Q45 Sport
90 day: 23.08 mpg (US)

blackie - '14 nissan altima sv
Thanks: 2,203
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WELCOME!!you might look at the mods I made on my 2002 Infiniti Q45 Sport.
gotta run a gauge.
gotta 'adjust the nut behind the wheel.'
Ran higher psi for 200,000+ miles....never had a grip problem.
Went a size up on tire, to lower rpms while on freeway.
see links in sig for other mods

PS. never turned the AUto a/c off and still got 30+ mpg. If you are gong to drive a luxury car....ride in luxury!!!!
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MetroMPG: "Get the MPG gauge - it turns driving into a fuel & money saving game."

ECO MODS PERFORMED:
First: ScangaugeII
http://ecomodder.com/forum/showthrea...eii-23306.html

Second: Grille Block
http://ecomodder.com/forum/showthrea...e-10912-2.html

Third: Full underbelly pan
http://ecomodder.com/forum/showthrea...q45-11402.html

Fourth: rear skirts and 30.4mpg on trip!
http://ecomodder.com/forum/showthrea...tml#post247938
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Old 08-10-2014, 06:32 PM   #3 (permalink)
EcoModding Lurker
 
Join Date: Aug 2014
Location: Indiana
Posts: 2

Lexus - '92 Lexus LS400 V8
90 day: 23.94 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by mcrews View Post
WELCOME!!you might look at the mods I made on my 2002 Infiniti Q45 Sport.
gotta run a gauge.
gotta 'adjust the nut behind the wheel.'
Ran higher psi for 200,000+ miles....never had a grip problem.
Went a size up on tire, to lower rpms while on freeway.
see links in sig for other mods

PS. never turned the AUto a/c off and still got 30+ mpg. If you are gong to drive a luxury car....ride in luxury!!!!
Exactly! The car may not get the economy of a 1.5L but it sure is comfy and quiet on the highway. The V8 is nice for those ramps too. When you say you ran high pressure for 200,000+ miles, did your tires wear unevenly? I've had Bridgestone Turanza Serenity for about a year and they're supposed to be on the fuel economy side. Before I had 10 year old michelins and ran those up to 40psi because frankly I didn't care. I just don't want the new tires to wear out prematurely. Oh since this is a RWD car, I have cheap snow tires that I put on it as well, it really helps with the snow bands on the toll road.
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Old 08-10-2014, 06:42 PM   #4 (permalink)
Master EcoModder
 
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Join Date: Oct 2009
Location: Texas
Posts: 3,523

The Q Sold - '02 Infiniti Q45 Sport
90 day: 23.08 mpg (US)

blackie - '14 nissan altima sv
Thanks: 2,203
Thanked 662 Times in 477 Posts
I ran kuhmo high performance summer tires (snow...what's 'snow'!) and never had any uneven wear. Got between 42-46k per set.
As a note, the q was fast but I'm in my 50s and drive much easier than you yougins!

__________________
MetroMPG: "Get the MPG gauge - it turns driving into a fuel & money saving game."

ECO MODS PERFORMED:
First: ScangaugeII
http://ecomodder.com/forum/showthrea...eii-23306.html

Second: Grille Block
http://ecomodder.com/forum/showthrea...e-10912-2.html

Third: Full underbelly pan
http://ecomodder.com/forum/showthrea...q45-11402.html

Fourth: rear skirts and 30.4mpg on trip!
http://ecomodder.com/forum/showthrea...tml#post247938
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