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Premium gas for 2016 RX 450h?

Old 02-23-18, 10:06 PM
  #31  
Elation
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Originally Posted by jonmanch View Post
I have a RX450h and use 87 octane with no problem. The salesman told me that I could use 87 as that is what the dealer gives you when you pick up the car with a full tank, and the dealer only puts 87 in all of their demo and loaner cars. Have not had any lack of engine performance or noise.
The GS, GX, IS, LC, LS, NX300, RC, RX 450H REQUIRE Premium fuel.
87 is not an option.
Hopefully your salesman is mistaken.
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Old 02-24-18, 12:21 AM
  #32  
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Originally Posted by Elation View Post
The GS, GX, IS, LC, LS, NX300, RC, RX 450H REQUIRE Premium fuel.
87 is not an option.
Hopefully your salesman is mistaken.
That's what the book says, why would they say premium if it's not required?
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Old 03-01-18, 09:29 AM
  #33  
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Thumbs up Here's something Interesting - re: 87 vs 91 octane

So, I decided to try 87 octane (from Costco as well as from Shell), and compare it with Costco 91 and Shell 91 octane fuel.

Since moving to 87, I have *better* mpg than with Premium! Performance seems about the same but mpg is definitely up.

Any brand of 91 octane, I averaged 27mpg. With 87 octane, I'm consistently getting 29.5 - 30mpg.

Weird. I would of expected the exact opposite.

-aki
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Old 03-01-18, 09:46 AM
  #34  
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Originally Posted by AkiD View Post
So, I decided to try 87 octane (from Costco as well as from Shell), and compare it with Costco 91 and Shell 91 octane fuel.

Since moving to 87, I have *better* mpg than with Premium! Performance seems about the same but mpg is definitely up.

Any brand of 91 octane, I averaged 27mpg. With 87 octane, I'm consistently getting 29.5 - 30mpg.

Weird. I would of expected the exact opposite.

-aki
Your mileage is outstanding. Do you have the hybrid?

I saw and felt improvements when I compared premium vs regular as well.
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Old 03-01-18, 10:09 AM
  #35  
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Originally Posted by Hubs View Post
Your mileage is outstanding. Do you have the hybrid?

I saw and felt improvements when I compared premium vs regular as well.
Yes, the '17 450h. Sorry, forgot to mention that. Also, I've discovered that ECO mode is good for, at most 2/10ths mpg better than Regular mode and the difference between Regular and Sport is about 2/10 (with sport being 2/10 mpg less than Regular).

I just went over 5k on the odo.

For that little of a difference, I'm finding myself using sport mode a lot more. LOL
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Old 01-05-19, 04:04 PM
  #36  
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Resurrecting this thread to mention that I saw an ad for a Lexus in a magazine the other day (sports car, not RX, but that's all I recall). The text mentioned horsepower and had an asterisk. Then, at the bottom, in tiny print, they said something like, "...quoted HP while using fuel with RON of 91..."

In other words, engine would be happy on regular gas, but you'd lose a bit of horsepower.
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Old 01-05-19, 05:11 PM
  #37  
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Originally Posted by riredale View Post
Resurrecting this thread to mention that I saw an ad for a Lexus in a magazine the other day (sports car, not RX, but that's all I recall). The text mentioned horsepower and had an asterisk. Then, at the bottom, in tiny print, they said something like, "...quoted HP while using fuel with RON of 91..."

In other words, engine would be happy on regular gas, but you'd lose a bit of horsepower.
Yes the handbook states 91 as the minimum.
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