Go Back   Club Lexus Forums > Lexus Model Forums > GX Models > GX - First Generation
Sign in using an external account
Register Forgot Password?

Gasoline grade

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 11-24-11, 07:40 AM   #16
cssnms
Lexus Test Driver
Trader Score: (0)
 
Join Date: Jun 2008
Location: MD
Posts: 1,258
Default

my engine is very healthy at 70k miles running mostly regular and i promise it will last far longer. I can't wait to report back here when it has 180k mi on it and it still going strong. Fact is if your engine is not pinging/knocking it is doing just fine on whatever grade of gas you have chosen. If you hear knocking it means it's time to try another brand of gas and or octane.
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
__________________
Chris
Drives
2005 GX 470
Tint, Clear bra, HID's - Lows: DDM 35W Ballasts, Morimoto 4300k bulbs
2013 Toyota Tundra Crewmax Platinum
Tint, 1.25" Wheel Spacers, Clear Bra, BAK VP Tonneau Cover, HID's - Lows: Morimoto Mini Projectors, Morimoto 35w Ballasts, Morimoto 4300k bulbs Highs: DDM 55w Ballasts, DDM 4500k bulbs Fogs: DDM 35w ballasts, DDM 4500k bulbs
cssnms is offline   Reply With Quote
Old 11-24-11, 05:05 PM   #17
purplehazek4
Lead Lap
Trader Score: (0)
 
Join Date: Jul 2005
Location: CA
Posts: 485
Default

Quote:
Originally Posted by Taco_Kid View Post

a grade recommendation is typically for compression issues.

9.6:1 comp isnt all that high for gasoline.

HAPPY TURKEY DAY

__________________
2005 GX470 silver pine with sport package

FS: Defiant light bar
purplehazek4 is offline   Reply With Quote
Old 11-25-11, 04:32 AM   #18
LifeEnjoyr
Driver
Trader Score: (1)
 
LifeEnjoyr's Avatar
 
Join Date: Feb 2011
Location: California
Posts: 130
rogerma lifeenjoyer
Default

I've been using 91 at almost every fill-up. I have tried 87 a few times and didn't notice any significant difference, though it did burn a tank of gas just slightly faster. I think whether you use 87 or 91, it pretty much evens out in terms of costs (87 burns a little faster, 91 last a little longer).

I pump mainly at Costco due to their awesome prices and pretty much anywhere else when they are closed (gas pumps are closed by 9:30pm), don't notice any difference at all with brands.
__________________
Blizzard Pearl GX470
*6000K HIDs *Goodyear Wrangler Silent Armor Tires *K&N 63 Series Intake *Gibson Catback Exhaust System *More to come...

FJ80 Landcruiser x Safari Rack x HIDs x BFG A/Ts *More coming soon...

FJ60 Toyota Landcruiser
4-speed Manual*Procomp Xtreme Tires* Rack* (SOLD)
LifeEnjoyr is offline   Reply With Quote
Old 05-12-12, 06:50 PM   #19
LXGXSAM1
Rookie
Trader Score: (0)
 
Join Date: Oct 2011
Location: CA
Posts: 84
Default My GX is allergic to low octane

My wife kept using regular unleaded and kept complaining about tapping/knocking noise and I told her to stop using low octane gas because it will cost more to fix the engine than saving on fuel.
__________________
2010 RX, Lux Pack, ML, HUD, Chrome Wheels, etc.
2008 GX, All the good stuff plus Sports Pack (KDSS, Graphites, and Smoked Lenses).
2010 HS, T-boned, saved my life, side airbags save life.
2000 LX, family cruiser for a decade, retired and traded for RX.

(Family/my vehicles in 25 year span: RX, GX, HS, LX, 07 Yaris, 03Matrix, 03 Sequoia, 96 Tacoma, 03 Oddysey, 99 Corolla, 95 Rodeo, 04 Civic, 97 Supra, 99 Ranger, 90 Camry, 86 Celica Supra, 79 Celica)
LXGXSAM1 is offline   Reply With Quote
Old 05-12-12, 08:09 PM   #20
snhrph
Pole Position
Trader Score: (0)
 
Join Date: Oct 2007
Location: New Jersey
Posts: 281
Send a message via AIM to snhrph
Default

Quote:
Originally Posted by LXGXSAM1 View Post
My wife kept using regular unleaded and kept complaining about tapping/knocking noise and I told her to stop using low octane gas because it will cost more to fix the engine than saving on fuel.
I think your wife was doing the right thing. Our trucks are smart enough to adapt to the grade of gas you are using and your engine will do just fine.

On the other hand, if you feel the need to spend extra $$$ - you should go ahead and do so.

Whatever you do, your peace of mind is worth almost any price...
snhrph is offline   Reply With Quote
Old 05-12-12, 08:23 PM   #21
atokad
Driver School Candidate
Trader Score: (0)
 
Join Date: Feb 2012
Location: CO
Posts: 20
Default

I just bought an '07 w/67K on it. I have only put about 1500 miles on it to date. I had read this forum a bit prior to purchasing it and had read another thread somewhere about premium fuel vs regular and the consensus seemed to be that regular was just fine, prior model years only recommended regular, 4R only use regular etc. So after a couple tanks of regular I noticed the idle was very erratic and fluctuating from 800-1100 RPM back and forth, up and down sometimes as high as 1500 RPM. It felt like I was always having to ride the brakes and "hold her back".

So today, a tank of premium and it's idling smoothly at 500 RPM at a stop while in gear and about 700-800 RPM's if I put it in N or P.

That pretty much has confirmed the regular vs premium debate for me. Note: I am in Colorado where we only have Ethanol blended gas available and our standard regular octane that I had been using was 85. We have a midgrade available at 87 and our premium is 91. I may try a tank or two of the 87 to see how it runs, but that will probably be only about 1:4.
atokad is offline   Reply With Quote
Old 05-12-12, 09:46 PM   #22
mbenz80
Rookie
Trader Score: (0)
 
mbenz80's Avatar
 
Join Date: Aug 2011
Location: IL
Posts: 88
Default

My GX has 262K miles on it, likes the regular grade and so far I haven't noticed irregular idle or valve knock.
__________________
2003 Lexus GX470 280K miles
1999 Mercedes ML320 222K miles
mbenz80 is offline   Reply With Quote
Old 05-12-12, 10:25 PM   #23
LXGXSAM1
Rookie
Trader Score: (0)
 
Join Date: Oct 2011
Location: CA
Posts: 84
Default

Quote:
Originally Posted by snhrph View Post
I think your wife was doing the right thing. Our trucks are smart enough to adapt to the grade of gas you are using and your engine will do just fine.

On the other hand, if you feel the need to spend extra $$$ - you should go ahead and do so.

Whatever you do, your peace of mind is worth almost any price...
My wife used regular on the 01 LX which I traded to this 08 GX but to my surprise, the GX with the tweaked LX engine is having a difficulty with regular unleaded. I drive the GX once in a while and I did notice some knocking.

I use premium when I drive it and I don't get that strange sound from the hood. I let my wife use regular but lately she kept complaining of the sound so I finally told her to use premium.

At the most, we will spend about $150 more on gas every year, which to me is more sensible than paying thousands in engine repair.
__________________
2010 RX, Lux Pack, ML, HUD, Chrome Wheels, etc.
2008 GX, All the good stuff plus Sports Pack (KDSS, Graphites, and Smoked Lenses).
2010 HS, T-boned, saved my life, side airbags save life.
2000 LX, family cruiser for a decade, retired and traded for RX.

(Family/my vehicles in 25 year span: RX, GX, HS, LX, 07 Yaris, 03Matrix, 03 Sequoia, 96 Tacoma, 03 Oddysey, 99 Corolla, 95 Rodeo, 04 Civic, 97 Supra, 99 Ranger, 90 Camry, 86 Celica Supra, 79 Celica)
LXGXSAM1 is offline   Reply With Quote
Old 05-13-12, 10:49 AM   #24
clubsport
Pole Position
Trader Score: (0)
 
Join Date: Feb 2012
Location: usa
Posts: 380
Default

what year is your truck, i run 89 91 depending and they seem the same... i think the later years have higher compression where 91 would be better

Quote:
Originally Posted by atokad View Post
I just bought an '07 w/67K on it. I have only put about 1500 miles on it to date. I had read this forum a bit prior to purchasing it and had read another thread somewhere about premium fuel vs regular and the consensus seemed to be that regular was just fine, prior model years only recommended regular, 4R only use regular etc. So after a couple tanks of regular I noticed the idle was very erratic and fluctuating from 800-1100 RPM back and forth, up and down sometimes as high as 1500 RPM. It felt like I was always having to ride the brakes and "hold her back".

So today, a tank of premium and it's idling smoothly at 500 RPM at a stop while in gear and about 700-800 RPM's if I put it in N or P.

That pretty much has confirmed the regular vs premium debate for me. Note: I am in Colorado where we only have Ethanol blended gas available and our standard regular octane that I had been using was 85. We have a midgrade available at 87 and our premium is 91. I may try a tank or two of the 87 to see how it runs, but that will probably be only about 1:4.

Last edited by clubsport; 05-16-12 at 12:10 PM..
clubsport is offline   Reply With Quote
Old 05-14-12, 09:51 AM   #25
NYC470
Driver School Candidate
Trader Score: (0)
 
Join Date: May 2012
Location: NY
Posts: 7
hatzolah@yahoo.com
Default

Any recommendations for a 2007 GX470?
NYC470 is offline   Reply With Quote
Old 05-16-12, 10:12 AM   #26
Makakio
Driver School Candidate
Trader Score: (0)
 
Join Date: Apr 2012
Location: CA
Posts: 21
Default

At NYC - recommended is 91. Go with 91, unless you really feel the need to buck Lexus engineering advice and/or bought too much car (or maybe better stated as 'too few MPGs' haha) from an operations-cost standpoint.

I don't buy the 'argument' that this is just marketing of some sort. After all, what genius would market higher cost of ownership / operation - especially for a guzzler like the 470?? And to my knowledge the higher-output GX engine (2005+ ?) has been tweaked to run higher compression levels than the 4Runner or Tundra, which sparked the switch to premium recommendation.

My math on 15k miles/year (national average?) goes like this:

15,000 / 16.5mpg (average mixed MPG for a 2007) = 909 gallons
Difference here in CA 87 octane - 91 octane = 6% per gallon (today $4.23 / $4.43)
Regular annual: $3845/year
Premium annual: $ 4026/year
Difference: + $181/year for the recommended
Mid-grade 80 octane will be right in the middle: + $90/yr

Peanuts. I will say those annual gas numbers (grade regardless) are depressing. Happy that between highway trips and soccer duty we're only racking up about 2/3rds of that average annual mileage in the GX.
Makakio is offline   Reply With Quote
Old 05-16-12, 10:27 AM   #27
clubsport
Pole Position
Trader Score: (0)
 
Join Date: Feb 2012
Location: usa
Posts: 380
Default

yea, i would have to agree with makakio, very sound reasoning... i didn't see the premium sticker on my 2004 truck before so i did 89 for a short while but did 91 afterwards... no real difference i could tell but i been using 91 lately anyway

Last edited by clubsport; 05-16-12 at 12:11 PM..
clubsport is offline   Reply With Quote
Old 05-16-12, 11:59 AM   #28
PDubs
Rookie
Trader Score: (0)
 
Join Date: May 2012
Location: TX
Posts: 78
Default

We'll be using the middle: 89. If pinging/knocking, then back up to 93.
PDubs is offline   Reply With Quote
Old 05-16-12, 04:58 PM   #29
clubsport
Pole Position
Trader Score: (0)
 
Join Date: Feb 2012
Location: usa
Posts: 380
Default

oh yeah, i mistyped on the last two posts, i used 89 and 91 octane... never ever 87 octane... for all you folks with pre-2005 trucks don't use 87 ever...
clubsport is offline   Reply With Quote
Old 05-17-12, 11:39 AM   #30
dandg
Driver
Trader Score: (0)
 
Join Date: Mar 2004
Location: New Hampshire
Posts: 150
Default

Quote:
Originally Posted by Makakio View Post
At NYC - recommended is 91. Go with 91, unless you really feel the need to buck Lexus engineering advice and/or bought too much car (or maybe better stated as 'too few MPGs' haha) from an operations-cost standpoint.

I don't buy the 'argument' that this is just marketing of some sort. After all, what genius would market higher cost of ownership / operation - especially for a guzzler like the 470?? And to my knowledge the higher-output GX engine (2005+ ?) has been tweaked to run higher compression levels than the 4Runner or Tundra, which sparked the switch to premium recommendation.

My math on 15k miles/year (national average?) goes like this:

15,000 / 16.5mpg (average mixed MPG for a 2007) = 909 gallons
Difference here in CA 87 octane - 91 octane = 6% per gallon (today $4.23 / $4.43)
Regular annual: $3845/year
Premium annual: $ 4026/year
Difference: + $181/year for the recommended
Mid-grade 80 octane will be right in the middle: + $90/yr

Peanuts. I will say those annual gas numbers (grade regardless) are depressing. Happy that between highway trips and soccer duty we're only racking up about 2/3rds of that average annual mileage in the GX.
Well done and spells it out nicely !

I have,to help offset the gas prices in general,more then enough oil stocks and figure that makes up for any pain at the pump.Also just ordered one of those speed pass things that give 15 cents back,before that you could use a CC that gives 5% back if your intent on saving at the pump.

Have yet to put any gas in mine (only driven it about 30 miles since delivery with a full tank-doubt they put in the 91 Octane thou) but when it get down under a 1/4-it will get the 91.
dandg is offline   Reply With Quote
Old 05-17-12, 11:39 AM
 
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Reg gas question Xxaaronxx IS - Second Generation 16 09-01-12 12:34 PM
Octane Emilaman Maintenance 12 03-19-11 08:18 PM
Can I use mid grade gas? TJ Lex Performance & Maintenance 11 06-26-06 06:01 PM
using middle gas grade for LS430 alextv Maintenance 15 02-07-04 07:22 AM
premium gas Mike Performance 10 09-16-02 10:57 PM


Tags
2003, 2009, 470, 89, es300, forums, fuel, gas, gasoline, grade, grde, gx, lexus, premium, vehicles

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 04:11 PM.

Join ClubLexus
Advertising


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


Get all contact info