[Kennedy]

What fuel type/grade are you using in your Lexus NX?

 

[ClaudeNX]

Premium, more money but more miles per gallon and clean engine giving best performance

 

[SanT]

I use premium too. Either 87 or 91.

 

[David]

Premium, more money but more miles per gallon and clean engine giving best performance

How many more miles per gallon have you been getting.
I was reading on somewhere a while ago that using a higher octane than recommend doesn't result in any benefits, performance or gas mileage.

 

[mister]

I never understand why there is debate about this stuff. It seems to me that you should just use what the manual says.

 

[ClaudeNX]

Don t know how much more, since i always filles up with premium 91 or more when available, I have done this to all my previous cars (67) and never had cylinder head problems or any fuel related parts

 

[David]

Don t know how much more, since i always filles up with premium 91 or more when available, I have done this to all my previous cars (67) and never had cylinder head problems or any fuel related parts

Good to know, maybe that's also a way to help prevent an engine from excessive oil consumption down the road.

 

[LexMex]

How many more miles per gallon have you been getting.
I was reading on somewhere a while ago that using a higher octane than recommend doesn't result in any benefits, performance or gas mileage.

Octane levels are only relevant with compression level on engines. The compression ratio is around 10.0:1 for the NX, which is relatively low. You will run perfectly fine on mid or low octane. High octane would be pointless. It's more a mind game and waste of money.

 

[Thai]

Use what the owner's manual or fuel door jam says. Nothing more, nothing less.

 

[GlenK]

Premium. Wouldn't even consider anything less.

 

[mister]

Using the premium is just choosing to spend more for no good reason. Only certain engines need premium fuel, and the manual will tell you. I just implore you to do some research on this so that you don't waste money on premium for no benefit.

 

[David]

Using the premium is just choosing to spend more for no good reason. Only certain engines need premium fuel, and the manual will tell you. I just implore you to do some research on this so that you don't waste money on premium for no benefit.

Yup!

Unless i'm buying some car made for fun, like a Lexus RC, I won't care to spend more than I have to.

The NX is my cool commuter and im going minimal on spending.

 

[SanT]

I used to believe that there is no significant difference between regular and premium, so why spend unnecessarily. Then I got very dissatisfied with my 'BMW' because all through the nine years I drove three models, i used regular fuell. Then, one day i decided to go premium. The difference was obvious. The car was more responsive more "willing" to give me an enjoyable ride, whereas before, it was like an unwilling, lethargic beast of burden dragging it's four feet. Needless to say, i went premium since then and I had had a taste of what "ultimate driving machine" felt like although in entry level only

When I switched to RX, the salesman emphasized the fact that I could use regular gas in it and I did for a while until lethargy became unbearable. Went back to using premium and fell in love with RX all over again.

Enter the NX. I WANT THE EXPERIENCE TO BE FUN, ENJOYABLE from the very start, so premium only for me.
I'm aware, this is all subjective but I am willing to pay extra for what I would consider fun and enjoyable.
So does premium make a difference? It does for me.

 

[avocado]

For maximum engine performance, use the manufacturer's recommended octane rating, which for the turbo is premium. Engine electronics will let the car run on lessor grade gas without pinging, but not meet published hp/torque specs. Octane = Energy, provided the engine is designed for it.

 

[GlenK]

I used to believe that there is no significant difference between regular and premium, so why spend unnecessarily. Then I got very dissatisfied with my 'BMW' because all through the nine years I drove three models, i used regular fuell. Then, one day i decided to go premium. The difference was obvious. The car was more responsive more "willing" to give me an enjoyable ride, whereas before, it was like an unwilling, lethargic beast of burden dragging it's four feet. Needless to say, i went premium since then and I had had a taste of what "ultimate driving machine" felt like although in entry level only

When I switched to RX, the salesman emphasized the fact that I could use regular gas in it and I did for a while until lethargy became unbearable. Went back to using premium and fell in love with RX all over again.

Enter the NX. I WANT THE EXPERIENCE TO BE FUN, ENJOYABLE from the very start, so premium only for me.
I'm aware, this is all subjective but I am willing to pay extra for what I would consider fun and enjoyable.
So does premium make a difference? It does for me.

Well said and I agree completely. Would not even consider putting cheap gas in a Lexus. Always used premium in my vehicles, ski boat included. They just run better!!

 

[mister]

Funny debate here. It does seem subjective, but really you can look at objective evidence. I prefer to go with what the evidence says. But to each their own.

 

[SanT]

Objective evidence is relevant in matters such as performance,say, how fast from 0-60miles for example. That's objective because it's measurable, but is there an objective measurement for what someone considers fun and enjoyable?

 

[mister]

Saw this article and thought i would post it here as it seems pretty relevant.

http://www.autoguide.com/auto-news/2015/05/do-i-really-need-premium-gas-.html

Conversely if your car is only designed for 87 octane buying the expensive stuff may do little more than increase your costs. “Putting premium fuel in our vehicles most of the time won’t make a difference,” said Juriga, adding that these cars typically have spark-advance curves that are tuned for regular gasoline and can’t advance enough to take full advantage of the extra octane.

 

[Kennedy]

Objective evidence is relevant in matters such as performance,say, how fast from 0-60miles for example. That's objective because it's measurable, but is there an objective measurement for what someone considers fun and enjoyable?

Correct, if there is differences in numbers in those situations then maybe there is something real happening in their.

I always though you had to jump up quite a few octane numbers to get a noticeable increase, like 100 octane for example.

 

[SanT]

Saw this article and thought i would post it here as it seems pretty relevant.

http://www.autoguide.com/auto-news/2015/05/do-i-really-need-premium-gas-.html

Thanks for the link. Read it and the gist seems to be: if your engine is designed for premium, use premium; if designed to run on regular, use regular.