Go Back   Club Lexus Forums > Lexus Model Forums > LS Models > LS460, LS460L and LS600h
Sign in using an external account
Register Forgot Password?

Gas: Premium vs. Regular advantages, disadvantages (merged threads)

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 03-03-12, 10:27 AM   #166
JFNash
Lead Lap
Trader Score: (0)
 
Join Date: Aug 2009
Location: Riyadh
Posts: 490
Default

It's safe to assume that the LS460's engine ages with usage. How does the aging process occur? Does the lower-grade fuel accelerate the aging process? Or does the premium gas decelerate it?

I just don't understand the mechanics of it, and I think in the end it boils down to the question of how a particular grade of fuel, if at all, affects the engine's health.
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
JFNash is offline   Reply With Quote
Old 03-04-12, 07:12 PM   #167
Enigma869
Driver
Trader Score: (0)
 
Enigma869's Avatar
 
Join Date: Apr 2004
Location: Massachusetts
Posts: 199
Default

Quote:
Originally Posted by Dema View Post
Using regular agains premium you save around $40 a year.
While I won't criticize anyone's choice of gasoline to use in their vehicle, I think your math is WAY off here. Heck, I just filled up my Sienna this morning and Supreme was 40 cents higher per gallon. Just on my one fill up today, the cost difference would have been almost $10.00. Now, if I only filled my tank once every three months, your math might be remotely logical!

John
__________________
Current Vehicle:

2007 LS460 L With Executive Seating Package

Previous Lexus Vehicles:

2000 RX300
2004 LX470
Enigma869 is offline   Reply With Quote
Old 03-04-12, 07:43 PM   #168
I8ABMR
Lexus Fanatic
Trader Score: (0)
 
I8ABMR's Avatar
 
Join Date: Sep 2007
Location: Somewhere far far away
Posts: 19,354
Default

using regular gas will kill or destroy the engine. It will cause the ECU to retard timing and put the engine into safe mode. This will result in a loss of power. I am stinking to the premium but if I ever needed to put the regular stuff I wouldnt sweat it
__________________

2010 LEXUS ISF / F Sport rear Sway Bar / Michelin PSS

The ISF......The perfect car for an enthusiast. It can be driven to the track, run hard all day , and then transport me hundreds of miles home in luxury and comfort to pick up the wife for dinner and a movie....
I8ABMR is offline   Reply With Quote
Old 03-04-12, 09:09 PM   #169
PeachyKeen
Rookie
Trader Score: (0)
 
Join Date: Dec 2011
Location: TX
Posts: 54
Default

A lot of you guys are way off on this. The reality is that higher octane gas has a higher flash point. The engine was designed with optimal performance to be had at premium fuel. Now, with that said, it seems to run exceptionally well with regular unleaded fuel. I've tested more than a few tank fulls of each, and I see little to no improvement in mileage. I really can't feel any difference in performance either. These cars use direct injection, and that helps to keep the cars from knocking or predetonating. The computer also pulls some of the advance out of the timing if it senses any issues with ping, and as a result, you could expect lower HP/TQ figures. Once again, my real world testing over the last few months shows no problems on regular octane. I have yet to run this car in the heat of the summer, but my guess is that the hotter external temperatures of central Texas will probably make it harder on the car regards to a dispensation to want to ping on regular gas. I will certainly test it though, and see what happens.
PeachyKeen is offline   Reply With Quote
Old 03-05-12, 02:43 AM   #170
Mikey100
Lead Lap
Trader Score: (0)
 
Join Date: Jul 2011
Location: Lake Oconee GA
Posts: 482
Default

Quote:
Originally Posted by Enigma869 View Post
While I won't criticize anyone's choice of gasoline to use in their vehicle, I think your math is WAY off here. Heck, I just filled up my Sienna this morning and Supreme was 40 cents higher per gallon. Just on my one fill up today, the cost difference would have been almost $10.00. Now, if I only filled my tank once every three months, your math might be remotely logical!
John
Quote:
Originally Posted by PeachyKeen View Post
A lot of you guys are way off on this. The reality is that higher octane gas has a higher flash point. The engine was designed with optimal performance to be had at premium fuel. Now, with that said, it seems to run exceptionally well with regular unleaded fuel. I've tested more than a few tank fulls of each, and I see little to no improvement in mileage. I really can't feel any difference in performance either. These cars use direct injection, and that helps to keep the cars from knocking or predetonating. The computer also pulls some of the advance out of the timing if it senses any issues with ping, and as a result, you could expect lower HP/TQ figures. Once again, my real world testing over the last few months shows no problems on regular octane. I have yet to run this car in the heat of the summer, but my guess is that the hotter external temperatures of central Texas will probably make it harder on the car regards to a dispensation to want to ping on regular gas. I will certainly test it though, and see what happens.

Albert Einstein said succinctly ......

"If the facts don't fit the theory, change the facts." ............ LOL !

I, for one, appreciate the posts made by Enigma869/John AND PeachKeen !!!!!

Felix Cohen added ......... "Generally the theories we believe we call facts, and the facts we disbelieve we call theories."

There are sure a LOT of "Theories" on this subject. But as PeachyKeen so points out ........ It's really hard to let what you THINK you know get in the way of duplicatible, real-world factual results. Thanks, Guys !

Now we can add 1 more to this old adage ...... "Never discuss politic, religion and gasoline types in public or with your friends."

Mikey Lulejian - Lake Oconee, GA
PS - Mark Twain did have sumptin' to add about this ....... and with the liberty of paraphrasing ........"I am quite sure now that often, very often, in matters concerning religion and politics and gasoline types used in a Lexus a man's reasoning powers are not above the monkey's." ROFL.
__________________
FISHING
Is
The ONLY Anecdote For
CHAOS !!!!


* 2008 LS460 Noble Spinel Mica *
Mikey100 is offline   Reply With Quote
Old 03-05-12, 05:41 AM   #171
Enigma869
Driver
Trader Score: (0)
 
Enigma869's Avatar
 
Join Date: Apr 2004
Location: Massachusetts
Posts: 199
Default

Quote:
Originally Posted by I8ABMR View Post
using regular gas will kill or destroy the engine.
One of the more ridiculous statements that I've ever seen anywhere in my life! Good luck finding a single person at Lexus to ever make this statement!

John
__________________
Current Vehicle:

2007 LS460 L With Executive Seating Package

Previous Lexus Vehicles:

2000 RX300
2004 LX470
Enigma869 is offline   Reply With Quote
Old 03-05-12, 07:57 AM   #172
Jlacck
Rookie
Trader Score: (0)
 
Join Date: Sep 2007
Location: CO
Posts: 69
Default

Hi, I don't have an LS460 yet but I'm definitely in the market for buying one. One interesting statement I was told by a luxury car dealer is that at higher elevations the type of gas (oct) used doesn't really matter (something to do with less oxygen at higher altitudes). He mentioned that at sea level it definitely matters but as you go up in elevations, there really isn't a difference.

I live in Denver so I'm curious to know if anyone else has been able to vouch for this.
Jlacck is offline   Reply With Quote
Old 03-05-12, 08:08 AM   #173
Tee
Moderator
Trader Score: (0)
 
Tee's Avatar
 
Join Date: May 2008
Location: Atlanta, GA
Posts: 3,537
Default

I gues we can sum this thread up to..... it's your car so fill up with whatever you want to put in your 460. To each their own.
__________________

2007 LS460L Noble Spinel Mica/Cashmere
2012 RX350 Matador Red Mica/Parchment
2007 LS460 Black Sapphire Pearl/Cashmere (R.I.P.) http://tinyurl.com/78c36hd
2004 LS430 Modern Luxury-Flint Mica/Ash (R.I.P.) http://tinyurl.com/7wvpux5
My Build, Pics & Vids Thread: http://tinyurl.com/ckybwbo
Tee is offline   Reply With Quote
Old 03-05-12, 08:53 AM   #174
Nospinzone
Moderator
Trader Score: (0)
 
Nospinzone's Avatar
 
Join Date: Mar 2007
Location: MA
Posts: 2,381
Default

Quote:
Originally Posted by PeachyKeen View Post
A lot of you guys are way off on this. The reality is that higher octane gas has a higher flash point. The engine was designed with optimal performance to be had at premium fuel. Now, with that said, it seems to run exceptionally well with regular unleaded fuel. I've tested more than a few tank fulls of each, and I see little to no improvement in mileage. I really can't feel any difference in performance either. These cars use direct injection, and that helps to keep the cars from knocking or predetonating. The computer also pulls some of the advance out of the timing if it senses any issues with ping, and as a result, you could expect lower HP/TQ figures. Once again, my real world testing over the last few months shows no problems on regular octane. I have yet to run this car in the heat of the summer, but my guess is that the hotter external temperatures of central Texas will probably make it harder on the car regards to a dispensation to want to ping on regular gas. I will certainly test it though, and see what happens.
My experience with my '95 Q45a mirrors your experience. I don't remember exactly when I started using regular gas, but probably at least 120,000 of its 188,000 miles were on regular gas. Occasionally I would put in a tank of premium, but I could never see any noticeable performance enhancement and no better gas mileage. Certainly none worth the extra 20 to 30 cents extra per gallon.

The engine runs like it did when it was new. It did get better gas mileage when it was newer, but any engine is going to lose a little as it ages. I've only changed the plugs once at around 100,000 miles and they looked fine. As an aside, the other amazing thing is not only have I not had to change the transmission fluid, but I've never had to add any fluid.
__________________
07 LS460 SWB
08 Ferrari 612 Scaglietti
03 HD CVO Screaming Eagle Deuce
Nospinzone is offline   Reply With Quote
Old 03-05-12, 09:59 AM   #175
Nvbanker
Driver School Candidate
Trader Score: (0)
 
Nvbanker's Avatar
 
Join Date: Oct 2011
Location: Nevada
Posts: 21
Default

It is sad that people will spend the money for a premium luxury car, and then are too cheap to buy the gas required for optimum performance in their expensive car. I consider you to be a cheapskate and concur with the individual above who said, maybe you should look for something else. Sounds like you are more of an Avalon person than a Lexus person.
Nvbanker is offline   Reply With Quote
Old 03-05-12, 01:44 PM   #176
Mikey100
Lead Lap
Trader Score: (0)
 
Join Date: Jul 2011
Location: Lake Oconee GA
Posts: 482
Default

Quote:
Originally Posted by Nvbanker View Post
It is sad that people will spend the money for a premium luxury car, and then are too cheap to buy the gas required for optimum performance in their expensive car. I consider you to be a cheapskate and concur with the individual above who said, maybe you should look for something else. Sounds like you are more of an Avalon person than a Lexus person.
< Mikey falls backwards, in TOTAL AMAZEMENT !!!! > -
__________________
FISHING
Is
The ONLY Anecdote For
CHAOS !!!!


* 2008 LS460 Noble Spinel Mica *
Mikey100 is offline   Reply With Quote
Old 03-05-12, 04:27 PM   #177
DaveGS4
Forum Administrator
Trader Score: (2)
 
DaveGS4's Avatar
 
Join Date: Feb 2001
Location: North Carolina
Posts: 26,122
profile.php?id=100001050339562 @DaveGS4 DaveGS4 The Real DaveGS4
Default

Quote:
Originally Posted by Nvbanker View Post
It is sad that people will spend the money for a premium luxury car, and then are too cheap to buy the gas required for optimum performance in their expensive car. I consider you to be a cheapskate and concur with the individual above who said, maybe you should look for something else. Sounds like you are more of an Avalon person than a Lexus person.
Nvbanker, your comment isn't appropriate for this conversation or our community as its clearly meant to be insulting.

Please exit this thread.
__________________

*** Click image for team info! ***

LS430 Ultra * PCS * ML * Rear Fridge * Massaging and Reclining Rear Seats * Vaistech SL-I * Coastal Lockpick

Tundra SR5 5.7 and BMW E36 M3/4 track car (wife's)

** Want to put your PC to good use every night?** Click here to join the Club Lexus Folding Team and help find a cure for cancer and other diseases. May the force be with you.
DaveGS4 is offline   Reply With Quote
Old 03-06-12, 09:15 PM   #178
PeachyKeen
Rookie
Trader Score: (0)
 
Join Date: Dec 2011
Location: TX
Posts: 54
Default

NVBanker, I too consider myself to be a cheapskate. Obviously I'm smart enough to know where to spend my money, and maybe even more importantly, where NOT to spend my money.

I don't know how you can surmise what I should be driving, but I can tell you that I've driven a wide variety of vehicles. I'm thankful that I don't have people like you making my decisions for me. I appreciate the suggestions, however. I was only providing my own experiences, if you feel inclined to run super unleaded, go for it. Hell, if you want to run 104 octane race fuel in your LS460, then by all means, it's your car.
PeachyKeen is offline   Reply With Quote
Old 03-07-12, 06:53 AM   #179
CJITTY
Lexus Champion
Trader Score: (0)
 
CJITTY's Avatar
 
Join Date: Jul 2010
Location: The South
Posts: 4,109
CJATL404
Default

Quote:
Originally Posted by Jlacck View Post
Hi, I don't have an LS460 yet but I'm definitely in the market for buying one. One interesting statement I was told by a luxury car dealer is that at higher elevations the type of gas (oct) used doesn't really matter (something to do with less oxygen at higher altitudes). He mentioned that at sea level it definitely matters but as you go up in elevations, there really isn't a difference.

I live in Denver so I'm curious to know if anyone else has been able to vouch for this.
Once you get your LS ..we will really need your help on a major issue for us who have lowered our cars since you live in Denver..you will get a PM from me shortly to explain
CJITTY is offline   Reply With Quote
Old 03-07-12, 10:07 AM   #180
cheez80
Lexus Test Driver
Trader Score: (1)
 
cheez80's Avatar
 
Join Date: Feb 2007
Location: CA
Posts: 922
Send a message via AIM to cheez80
Default

there's a really good article about this in this month's (april 2012) issue of road and track. it's the one with the line of corvettes on the front
__________________

got a new LS450, ain't no keys in this doohickey
cheez80 is offline   Reply With Quote
Old 03-07-12, 10:07 AM
 
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Privacy and Lexus’ “Black Box” Big Jimm LS460, LS460L and LS600h 9 09-11-06 08:36 AM
Lexus Leather Big Jimm LS460, LS460L and LS600h 19 09-08-06 11:33 PM
Mark Levinson‘s New 19-Speaker System Big Jimm LS460, LS460L and LS600h 7 08-18-06 12:49 PM
Selectable Sport Shift Mode for 460's? Big Jimm LS460, LS460L and LS600h 14 08-10-06 01:36 AM
Hands Free Parking on the LS460 .. How?? Big Jimm LS460, LS460L and LS600h 10 05-05-06 07:25 PM


Tags
1995, 253, 30, 87, 93, 95, accidentally, amarillo, area, bad, bay, cent, chevron, costco, es330, fuel, gas, gasoline, grade, high, infiniti, is300, lexas, lexus, low, lowest, ls, ls430, ls460, octane, power, premium, problems, put, putting, q45a, rebate, regular, reguler, running, stations, symptoms, tesoro, turbo, usa, versas, vs, washington

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -7. The time now is 08:27 AM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info