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Who uses 87 octane in their 2010 RX350?

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Old 09-29-11, 07:31 AM   #1
BatmobileX
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Default Who uses 87 octane in their 2010 RX350?

I just read that the 2012s will take the cheap gas no problem but I'm wondering about the 2010. I have never paid for premium gas and don't really want to do it now if I don't have to.
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Old 09-29-11, 11:48 AM   #2
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i have a 2011 and i'm using unleaded (87).
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Old 09-29-11, 12:47 PM   #3
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I just did a calculation and find it would save me less than $200 a year to go cheap so I'll probably suck it up and pay the extra.
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Old 09-29-11, 03:11 PM   #4
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Quote:
Originally Posted by BatmobileX View Post
I just read that the 2012s will take the cheap gas no problem but I'm wondering about the 2010. I have never paid for premium gas and don't really want to do it now if I don't have to.

You spend $40k+ on your vehicle and you want to skimp on a few dollars for gas?
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Old 09-29-11, 03:16 PM   #5
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Originally Posted by foxwiz View Post
You spend $40k+ on your vehicle and you want to skimp on a few dollars for gas?
Please see my subsequent post.
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Old 09-29-11, 04:22 PM   #6
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You can't go wrong with either grade of gas. Which ever you're comfortable with.
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Old 09-29-11, 04:41 PM   #7
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The only problem is, suppose it really does make a difference, and I buy a used 2010 and start pumping the premium gas, meanwhile the previous owner has already crapped up the engine by using the lower octane fuel, I'm kinda throwing my money away. Guess you can't really know for sure.
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Old 09-29-11, 05:32 PM   #8
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running lower octane will not crap-up the engine

computer tunes engine timing based on spark knock from whatever octane you run

running higher octane can be cheaper in the long run as you'll get better mpg from higher octane
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Old 10-02-11, 09:49 AM   #9
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I have used the mid range 89 octane gas and the RX runs fine, I did not notice any difference in the power or gas mileage. It sure has more power when it is just washed and waxed though. Funny how that works!!!
Cheers,
Jim!
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Old 10-02-11, 11:38 AM   #10
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For the Genesis V8 Hyundai shows the hp/torque ratings using both regular and premium (385 prem./378 reg.). Makes it nice for the driver to decide which they want to use. The V6 is rated using regular only (333 hp).
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Old 10-02-11, 04:10 PM   #11
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Quote:
Originally Posted by BatmobileX View Post
The only problem is, suppose it really does make a difference, and I buy a used 2010 and start pumping the premium gas, meanwhile the previous owner has already crapped up the engine by using the lower octane fuel, I'm kinda throwing my money away. Guess you can't really know for sure.
Don't worry about it.
You'll be just fine.

What's more improtant is you don't stick with one oil company.
Do a switch every now and then, say every 5000 miles.
That way you will flush the additive from the previous oil Co.

These gasoline have the same base, meaning all these Co are using the same stuff.
And they're sharing. It makes more sense that way than to deliver a truck of gasoline 3000 miles.

What makes them unique/special is the additive. And that's what you should be more concerned about.
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Old 10-02-11, 05:49 PM   #12
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I've used four grades in my '11 RX, 87, 89, 91 and 94 octane and honestly haven't seen any difference in mileage or performance. in fact my worst mileage was from a tank of Sunoco 94. I'm sure that using 87 octane produces somewhat less hp/torque but it doesn't show up in normal RX type driving. The 3.5L V6 is the same basic engine as in the RAV4, Camry, Avalon, Venza and others. It is just rated at higher numbers in Lexus applications by running it on premium fuel. Just because someone can afford to pay $50,000+ for a car doesn't mean they want to throw their money away giving it to the oil companies for no measurable return!
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Old 10-02-11, 05:53 PM   #13
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I Just because someone can afford to pay $50,000+ for a car doesn't mean they want to throw their money away giving it to the oil companies for no measurable return!
Precisely how I feel about it. If it makes a difference in performance/gas mileage I'll pay it but if not I'll use that $200 a year for something else.
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Old 10-03-11, 06:32 AM   #14
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I usually use 93 octane but on occasion will pump 87. I do not notice any difference in as far as driving the car. Perhaps the mpg is better with 93.
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Old 10-03-11, 06:25 PM   #15
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Ask yourselves this. When you first drove the RX out of the dealer's lot. It has a full tank of gas right?
Do you think the dealer placed a premium or just the regular unleaded?
Hmmm..

Last edited by markrivers; 10-03-11 at 06:31 PM.
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2009, 2010, 350, 87, fuel, gas, gx, lexus, lexusrx350loweredfrom91octaneto87octane, octane, prem, premium, reg, require, rx, rx350, unleaded

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