What fuel grade are you using in your RX350?
01-24-18, 05:29 AM
#92
01-24-18, 05:31 AM
#93
Advanced
But, they do not in the RX350. At least, not since 2011.
http://lexus2.custhelp.com/app/answe...xus-vehicle%3F
http://lexus2.custhelp.com/app/answe...xus-vehicle%3F
450h --> Premium
350 --> Regular
As simple as that.
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Oldfart (01-24-18)
01-24-18, 07:02 AM
#94
This reminds me of Fabio not believing it's butter. And spring water versus artesian water. 
If there's a decrease in performance from using 87 octane gas, the owner manual wouldn't even recommend using 87. Owner manuals are very specific and it'll state that it needs 91 octane or higher, just like the RX450H and IS200t manuals. The IS200t also has a sign that says to use premium fuel next to the gas cap.
If there's a decrease in performance from using 87 octane gas, the owner manual wouldn't even recommend using 87. Owner manuals are very specific and it'll state that it needs 91 octane or higher, just like the RX450H and IS200t manuals. The IS200t also has a sign that says to use premium fuel next to the gas cap.
The problem is the owners manual of RX 350 is not clear about it. Most Ford performs the best with octane 93 and the horsepower rating on paper is with the 93 octane. But their manual says minimum 87 octane and recommend 93.
2011 Lincoln MKX says recommends octane 87.
2001 Honda Odyssey minimum 87, recommend 91.
2017 Mercedes/BMW, Require Premium( not recommend)
2017 Lexus RX 350 just says minimum 87 and nothing more.
That’s why it’s confusing a lot of people.
2011 Lincoln MKX says recommends octane 87.
2001 Honda Odyssey minimum 87, recommend 91.
2017 Mercedes/BMW, Require Premium( not recommend)
2017 Lexus RX 350 just says minimum 87 and nothing more.
That’s why it’s confusing a lot of people.
Last edited by Elation; 01-24-18 at 07:40 AM.
01-24-18, 07:23 AM
#95
The manual states to not use anything below 87. Using higher will not harm anything. It's as simple as that.
01-24-18, 07:38 AM
#98
This link is from Lexus: http://lexus2.custhelp.com/app/answe...xus-vehicle%3F
The manual states to not use anything below 87. Using higher will not harm anything. It's as simple as that.
The manual states to not use anything below 87. Using higher will not harm anything. It's as simple as that.
Ya, says “will not harm”. What does that mean? Why can’t it simply say “ regular recommended” “ no performance increases if using above 87 etc.
When it stays recommends 87 or higher, it confuses people.
When it stays recommends 87 or higher, it confuses people.
Last edited by Elation; 01-24-18 at 07:44 AM.
01-24-18, 07:42 AM
#99
Our 87 is equal to European 91 (RON 91, Reasrch on number 91)
[QUOTE=PeeVee;10091779]This is what the manual states : "Select 87 (Research 91)" For whatever research means, it is not required.
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PeeVee (01-24-18)
01-24-18, 08:14 AM
#101
But, they do not in the RX350. At least, not since 2011.
http://lexus2.custhelp.com/app/answe...xus-vehicle%3F
http://lexus2.custhelp.com/app/answe...xus-vehicle%3F
Oh, thanks for pointing it out. I didn't realize that. I have a GS and an RX, both 2008, both require premium fuel. I always stick with the manufacturer's recommendation.
01-24-18, 08:26 AM
#102
If you drive 12K miles a year, at 20 MPG you burn through about 600 gallons of gas. So, by using regular gas instead of premium you are saving around $120 per year. Is it worth it? I don't think you can hurt anything by using regular, but there is a reason why Toyota recommends premium gas.
wowza its like $0.70 here in MD..
but as pointed out by many in this thread.. i just follow the OEM recommendations..
01-24-18, 08:41 AM
#103
The problem is the owners manual of RX 350 is not clear about it. Most Ford performs the best with octane 93 and the horsepower rating on paper is with the 93 octane. But their manual says minimum 87 octane and recommend 93.
2011 Lincoln MKX says recommends octane 87.
2001 Honda Odyssey minimum 87, recommend 91.
2017 Mercedes/BMW, Require Premium( not recommend)
2017 Lexus RX 350 just says minimum 87 and nothing more.
That’s why it’s confusing a lot of people.
2011 Lincoln MKX says recommends octane 87.
2001 Honda Odyssey minimum 87, recommend 91.
2017 Mercedes/BMW, Require Premium( not recommend)
2017 Lexus RX 350 just says minimum 87 and nothing more.
That’s why it’s confusing a lot of people.
01-24-18, 09:00 AM
#104
Advanced
I read "select" or higher. Higher because if 87 can be used, there is no added benefits to use higher, but you CAN. But it is designed to use 87.
01-24-18, 09:01 AM
#105
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Cropdustef (12-18-19)