I compromised and us mid grade. I would bet $500 that when my Lexus dealer filled the tank before delivery, it was regular!

What we have to look forward to is E85! If our government gets their way we will be looking for any gas with only 10% alcohol. These corn farmers are now addicted to these profits.

 

 

Bro it's the way you look at it. I look at as it is only $4-$6 more a fill-up so why not go premium, some look at it as you save $4-$6 a fill-up why not save that? Really it is your mindset nothing else...

 

This superfluous argument has been played out over and over. The point is that the LX will run on regular if you so wish to use it.

It seems that it is us humans that have the issues and not the LX.

 

I used Regular fuel for my truck for the past 5 years with no issues. Every Lexus Lx570 in my country does the same.

 

Every manufacture would love you to run premium gas in their cars, it would make the engine in the car seem like a better engine.....but manufactures that build economy cars know not to put yeah this car needs premium on their manuals bc the Club corolla and club civic would be outraged ...but throw a lexus logo on a manual and tell people to put premium and they all will think THERE HAS to be a reason why, it is just a superior engine...thats why im paying more! when in reality its the same engine. Then there is a placebo effect where people drive a 2013 Avalon and a 2013 ES350 and are convinced the lexus has the better engine. anyways back to the topic the engine in the LX570 was not designed for the LX570 it was designed for the Land Cruiser in fact the engine made its debut in Tundras and Sequoias while the 200 series land cruiser was still being developed. The point is, this engine was made to work in the most extreme conditions in the most remote areas of the world where there is not a "BP" or a "shell" There is really low grade gas far lower than what you find in your suburban towns local BP or shell. The engine was designed with that in mind so dont think the iForce in the LX is an engine that needs to be pampered...although it will make you feel better to put premium in your 85k land cruiser or 90k LX and you can probably afford it so you will probably do it anyways

 

This battle has been brewing for as long as I can remember.

In the old cars it did make a difference as they had not have a computer to adjust the spark advance. When the vehicle knocked you put high test in on the next fill up or poured in an additive. Done!

In the newer vehicles the computer will adjust the spark accordingly, so the use of premium is a waste of money.

We got over 250K on our last vehicle that stated it required premium fuel.

It's all a marketing tool. People that buy these "expensive vehicles" will spend the extra money as they think it adds value and makes them feel good.

It's like telling them they can only have their Lexus serviced by Lexus. Doing so by any other means, says you voided the warranty. The sad portion about that is I know many people think that way. More money than brains syndrome I call it.

 

Guilty as charged ... except the part about more money than brains ... I have plenty of both.

Your analogy is excellent, but it proves my point ... not yours. Toyota/Lexus is not in the gasoline business and I would be hard pressed to believe there is any payback for getting their customers to buy premium gas. There definitely is a payback for doing vehicle service as the service department is a "profit center" for dealerships.

There is no question that Lexus vehicles will run fine on regular gas ... that is a matter of fact as supported by numerous members of this forum. The question is why does Lexus SPECIFY premium gas for their vehicles while similar vehicles from Toyota do not?
Regards,

SaniDel


P.S. A nearby "top tier" retailer offers 20¢ off per gallon on Tuesdays, but only on premium ... I'll be there tomorrow.

http://www.toptiergas.com

 

Premium provides slightly better fuel mileage and the government requires the highest fuel mileage average possible. Therefore they recommend premium. Toyota knows it won't scare Lexus customers away.

Use what you want. Someone with more patients than me will have to run 5-10 tankfuls of each under the same driving conditions (speed, temperature, humidity, wind, etc and let us know.

 

If so, a Lexus vehicle should have a slightly higher mileage rating than an equivalent Toyota vehicle. For example, a Lexus LX 570 should be rated as achieving higher MPG than a Toyota Land Cruiser. Do they?
Regards,

SaniDel

 

Not so. Just because the LX might get slightly better mileage would not mean it would be rated that way. Certinally you know the world is not that simple.

For some reason this subject is getting to feel like " beating a dead horse".

In the end everyone should do as they wish. When the price of upgrading your fuel used to mean a 10-15 cent per gallon increase it can be as much as 50 cents or more per gallon today.

I have to admit that I spend little time worrying about this subject, but I will take another "swing at this dead carcass" just for fun!

 

You are correct ... the world is not that simple ... but my question is. Let's take another swing at this "dead horse" ... I'll ask my question again:

Is there a difference between the mileage rating of the LX 570 specified with premium fuel and the mileage rating of the Land Cruiser specified with regular fuel?

Here are the mileage ratings from Lexus and Toyota respectively:

http://www.lexus.com/models/LX/specs/

http://www.toyota.com/landcruiser/fe...tml#!/mpg/6156

Not only is there a rating difference, it's in the "wrong direction" ... not what I expected. On a MPG basis only (ignoring octane), the Land Cruiser is the winner. Add in the price of premium and the difference is larger still ... the Land Cruiser gets higher MPG, uses cheaper gas and achieves lower $PM (dollars per mile) than the LX570. On that basis alone the Land Cruiser 'wins' ... but no one makes their decision solely on that basis, right?

So, it seems that specifying premium fuel 'amplifies' the differences between the LX 570 and the Land Cruiser ... lower MPG, pricier fuel and higher $PM ... and that is by specification and design. In other words, Toyota 'wants' there to be a difference. Whether it matters in practical terms isn't the issue ... Toyota wants there to be a difference between these two products and they made it so!
Regards,

SaniDel


P.S. That's not the only difference ... horsepower, torque and especially curb weight are also different. They may be similar vehicles, but they are not the same vehicle.

 

Just an FYI when the land cruiser was first introduced in 08 it was not equipped with the 5.7 in the most remote parts of the world. Only in America and Mexico was it offered with the 5.7.

Now, back to the question of this thread. THE 5.7 NEEDS PREMIUM FUEL TO ACHIEVE THE 383HP rating. All other applications of the 5.7 make 381hp.

Also the 5.7 was design for the Tundra. Not the LC or LX as they just used it.

 

Thank you ... the question has been answered! There is a difference, it is negligible (two horsepower), but the real reason is marketing, which is what we all suspected.
Regards,

SaniDel

 

Sal the reason for a reg hired premium is for HP ratings. The LX makes 383hp on premium whereas the LC makes 381 on reg. This IS THE REASON.

Anyone remember Totota/Lexus products before they were SAE certified.

Well I certainly do, the Tundra 4.7 make 282hp with premium and when subjected to correct testing it then drop to 271hp.

The ES dropped from 280 to 268 when they stopped testing with premium.