gas???
Thread Starter
Pole Position
Joined: Mar 2004
Posts: 297
Likes: 1
From: Illinois
gas???
My lx 470 took 87 gas for 4 years without a hiccup. Dealer actually told me when I bought it new it would not be a problem.
Now, with the 570, it of course says premium fuel. Has anyone tried 87?? Also, when it says premium, are they talking 92, or 89??
Silly questions, as im sure the only gas meant to go in this is 92.
Here in Chicago, 92 is already over $4.15/gal. Ugh. Just curious to what you guys think.
Now, with the 570, it of course says premium fuel. Has anyone tried 87?? Also, when it says premium, are they talking 92, or 89??
Silly questions, as im sure the only gas meant to go in this is 92.
Here in Chicago, 92 is already over $4.15/gal. Ugh. Just curious to what you guys think.
Lexus Champion
Joined: Sep 2006
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From: MIchigan
Silly questions, as im sure the only gas meant to go in this is 92.
Pole Position
Joined: Jan 2005
Posts: 3,312
Likes: 542
From: Florida
I can tell you for sure that the mid grade will run just fine, heck I am betting the full tank the dealer gave us was not high test.
My VP just bought a fully loaded Tundra with the exact same motor and hp and his says 87 is just fine in his manual.
Why would Lexus say we have to use high test?
I do not mind paying the extra money for the extra octane if it gives me something in return.
My VP just bought a fully loaded Tundra with the exact same motor and hp and his says 87 is just fine in his manual.
Why would Lexus say we have to use high test?
I do not mind paying the extra money for the extra octane if it gives me something in return.
Lexus Champion
Joined: Sep 2006
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From: MIchigan
Why would Lexus say we have to use high test?
The Lx570 makes a little more hp and tq than the Tundra and likely is set up with a different exhaust ect. Also the 5.7 in the Lexus/LC is not the engine made in Alabama.
Lexus Test Driver
Joined: Oct 2006
Posts: 1,031
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From: US: Northeast
The ratings of the Lx570 were achieved using 91 octane or higher. The manual should state that if premium is not used performance will decrease.
The Lx570 makes a little more hp and tq than the Tundra and likely is set up with a different exhaust ect. Also the 5.7 in the Lexus/LC is not the engine made in Alabama.
The Lx570 makes a little more hp and tq than the Tundra and likely is set up with a different exhaust ect. Also the 5.7 in the Lexus/LC is not the engine made in Alabama.
Pole Position
Joined: Apr 2002
Posts: 374
Likes: 1
From: California
You can use any grade you want but you will not get the maximum power or torque and therefore likely not the maximum MPG if you don't use the recommended 91+ octane fuel in your LX.
Simple as that.
Simple as that.
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Lexus Champion
Joined: Sep 2006
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From: MIchigan
The manual does state 91 or higher...for whatever that is worth.
I don't think car manufacturers make cars than require 91 only anymore. I know my brothers Pathfinder and dads old Cadillac required it but the next engines adjust themselves when lower than 91 is used.
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Thread Starter
Pole Position
Joined: Mar 2004
Posts: 297
Likes: 1
From: Illinois
Per Lexus LX 570 instruction manual, p 684.
"Premium unleaded gasoline only"
"91 (Research Octane Number 96) or higher"
Then we have another gasoline tidbit on page 692:
"If 91 Octane cannot be obtained, you may use unleaded gasoline with an Octane Rating as low as 87 (research octane number 91). However, use of unleaded fuel with an octane rating lower than 91 may result in engine knocking or drastically reduce output to protect itself while driving a heavy load. Persistent knocking can lead to engine damage and should be corrected by refueling with higher octane unleaded gasoline."
Also, on page 692, it says:
"Premium unleaded gasoline with an octane rating 91 or higher required for optimum performance."
Bottom line, who the heck knows.
"Premium unleaded gasoline only"
"91 (Research Octane Number 96) or higher"
Then we have another gasoline tidbit on page 692:
"If 91 Octane cannot be obtained, you may use unleaded gasoline with an Octane Rating as low as 87 (research octane number 91). However, use of unleaded fuel with an octane rating lower than 91 may result in engine knocking or drastically reduce output to protect itself while driving a heavy load. Persistent knocking can lead to engine damage and should be corrected by refueling with higher octane unleaded gasoline."
Also, on page 692, it says:
"Premium unleaded gasoline with an octane rating 91 or higher required for optimum performance."
Bottom line, who the heck knows.
Racer
Joined: Jan 2002
Posts: 1,451
Likes: 65
From: CO
The way that i read it is: use premium or else knocking may occur which will damage engine. So, i don't think that you have any choice here if you plan on keeping your LX a long time.
For my G, i use premium because i want to keep it a long time...and my OM says the same thing...premium required!
Bright side for you guys, i get 13.5-14 mpg on the highway with my slightly oversized all-terrain tire (BFG AT KO 32").
For my G, i use premium because i want to keep it a long time...and my OM says the same thing...premium required!
Bright side for you guys, i get 13.5-14 mpg on the highway with my slightly oversized all-terrain tire (BFG AT KO 32").
Lexus Test Driver
Joined: Oct 2006
Posts: 1,031
Likes: 4
From: US: Northeast
The way that i read it is: use premium or else knocking may occur which will damage engine. So, i don't think that you have any choice here if you plan on keeping your LX a long time.
For my G, i use premium because i want to keep it a long time...and my OM says the same thing...premium required! Bright side for you guys, i get 13.5-14 mpg on the highway with my slightly oversized all-terrain tire (BFG AT KO 32").
For my G, i use premium because i want to keep it a long time...and my OM says the same thing...premium required!
Bright side for you guys, i get 13.5-14 mpg on the highway with my slightly oversized all-terrain tire (BFG AT KO 32").
I buy cars to serve a purpose.
Pole Position
Joined: Aug 2005
Posts: 346
Likes: 1
From: CA
gas is a staple and like milk, bread, etc, you gotta buy it.
It's only about a $5 difference to fill the 570 from 1/4 full. This is from the least expensive gas to the most expensive gas.
If I need to fill it once a week, it only comes to about $20 a month...not too bad.
I hate that gas is so pricey but I still get the highest octane, it's worth it to not have to question it.
I used to run a Sunoco race fuel (mixed) in my Corvette and motorcycles. It's about $20 a gallon now
It's only about a $5 difference to fill the 570 from 1/4 full. This is from the least expensive gas to the most expensive gas.
If I need to fill it once a week, it only comes to about $20 a month...not too bad.
I hate that gas is so pricey but I still get the highest octane, it's worth it to not have to question it.
I used to run a Sunoco race fuel (mixed) in my Corvette and motorcycles. It's about $20 a gallon now
Last edited by trusso; Apr 29, 2008 at 07:28 PM.
Lead Lap
Joined: Nov 2006
Posts: 410
Likes: 0
From: ca
This is a great topic!
I have driven my LS about 7,000 miles and have always used Premium fuel as recommended. I decided to try a tank of Regular fuel just to see if I could feel a difference. Now I'm sold on Premium. Running Regular, my car hesitates from a start and can tell that torque is diminished; it feels like a different car. It's definitely not worth saving $4 per fillup (which is about once every 3 weeks).
If you are skeptical of the Premium fuel requirement, I suggest trying Regular fuel. If you are happy with the performance of Regular fuel, you don't tow, and you take it easy, then go for Regular. To me, there's no point in drivng a vehicle with a nice V8 only to cripple it with cheaper fuel.
I have driven my LS about 7,000 miles and have always used Premium fuel as recommended. I decided to try a tank of Regular fuel just to see if I could feel a difference. Now I'm sold on Premium. Running Regular, my car hesitates from a start and can tell that torque is diminished; it feels like a different car. It's definitely not worth saving $4 per fillup (which is about once every 3 weeks).
If you are skeptical of the Premium fuel requirement, I suggest trying Regular fuel. If you are happy with the performance of Regular fuel, you don't tow, and you take it easy, then go for Regular. To me, there's no point in drivng a vehicle with a nice V8 only to cripple it with cheaper fuel.