Nah, listen to TikTok bro, Toyota put that “premium only” sticker inside the gas cap as a prank. They are such tricksters.
Super Confused in Fuel needed for 2024 Land Cruiser.
- Thread starter RTRinKY
- Start date
"At minimum, the gasoline you use should meet the specifications of ASTM D4814 in the U.S.A."
Yes, 87 gasoline meets this minimum.
Close this thread? This is all good discussion as far as I'm concerned. I'm also "not trying to stir the pot." I'm simply new here and participating in a couple threads already.
Yes, 87 gasoline meets this minimum.
Close this thread? This is all good discussion as far as I'm concerned. I'm also "not trying to stir the pot." I'm simply new here and participating in a couple threads already.
Yes, but the standard doesn't say the minimum is 87. As far as I remember it only deals with how to calculate octane, what the fuel can and cannot contain, additives etc. Its been awhile since I had access so I could be misremembering but I think I'm close.
So what I think toyota is saying is 91 and meet the standards
I do not think ASTM D4814 regulates octane number. The only thing it may regulate is how the fuel is labeled, as in you cannot label 88 octane as premium etc.
Let's try another way:
ASTM D4814 = fuel standards. Octane rating is separate from that and is just a test. That test produces a number by which then that allows that gas to go into the appropriate gas tank at a station.
Similar comparison.: Milk has a federal standard. Milk also comes in Non fat, 2% & whole.
ASTM D4814 = fuel standards. Octane rating is separate from that and is just a test. That test produces a number by which then that allows that gas to go into the appropriate gas tank at a station.
Similar comparison.: Milk has a federal standard. Milk also comes in Non fat, 2% & whole.
All auto fuel sold in the US meets the standards set out in ASTM D4814 (summer gas, winter gas, etc).
Therefore, the manual says that 87 gas meets the minimum standard required for LC.
But premium gas is preferred for optimal performance.
Therefore, the manual says that 87 gas meets the minimum standard required for LC.
But premium gas is preferred for optimal performance.
Premium only must mean you cannot use “super”. Oh and don’t forget no diesel Toyota doesn’t want us to use diesel.
Get a bronco, ha!!!! I got one for my daughter, a bronco sport, cool vehicle. The LC needs premium, it is really that big a deal? Some of these threads are getting old, go ahead and hate me. I love 
my LC, stock underground for now. Looking at all the goodies out now, and coming soon! 
my LC, stock underground for now. Looking at all the goodies out now, and coming soon! 
Shouldn't it be the other way around? As in...
Knock sensors allow the ECM to ADVANCE timing as much as possible to maintain the power band for the driving at hand to increase fuel economy. When the sensor(s) detect a knock they tell the ECU to DECREASE timing until the knock goes away, thus maintaining the power band etc.......... The vehicle doesn't know what the octane level is for the fuel that's in the tank, it just knows "X" fuel, obtain engine parameters (speed, torque, air density, pedal position and a lot of other inputs) , ADVANCE timing and determine if a knock condition exists......... if not, ADVANCE timing etc...... once it gets a knock DECREASE timing
Just keep in mind those following the “premium fuel” guidelines can’t put larger tires on their vehicles. You can’t cherry pick the guidelines to follow.
- Moderator
- #171
You are correct, Increasing timing will provide more power, decreasing timing will produce less power increasing economy, which one the ECU does first, IDK
I am running premium but. When I owned the FJ Cruiser it also said Premium. I ran 87 and mid grade in it and never once had an issue. You may not see optimal MPG. But what Trailman said is true of newer engines.
He also stresses the importance of using PREMIUM FUEL ONLY in the new LC. It's on his videos where he's talking about maintaining a turbo engine. While not specific to the LC, I think he makes it clear that premium fuel is important if the manufacturer requires it.
Has anybody done a deep dive into the fuel mapping between the LC and Tacoma? It could be the mapping is allowing more in a specific power band that is requiring the higher grade gas in the LC. Just because they appear to be the same engine doesn't mean that the mapping is the same and or internals. With the engine problems Toyota is having I think I would stick with the higher octane just to be safe.
I'm still getting close to 23mpg with mainly regular gas. Am I missing out on "optimal performance" with premium gas? I don't seem to be. Sheldon Brown, Toyota's chief engineer, was on TRD Jon's podcast and said the new Land Cruiser engine will do just fine with lower octane gas. He said the reason they labeled Land Cruiser "premium preferred" was because it was more global in nature and kept it the same as the outgoing Land Cruiser. He also conceded it's basically the same powertrain as other regular gas Toyota models. The difference is that these models are marketed towards just the North American market where as they wanted the Land Cruiser to have a singular global standard and, thus, settled on keeping the premium preferred approach.
Go to 17:07 minute. This guy knows what he's talking about
Of the available Octane levels of 87, 89, 91 and 94; which do you consider as ‘premium fuel’?
Except for the fact that Land Cruiser does not "require premium." The owner's manual simply says it's preferred for "optimal performance." And we've gone over why Toyota did this with the global Land Cruiser rollout (versus the Tacoma's North American rollout), and Toyota's own engineers have stated the Land Cruiser will do just fine with regular gas.
Toyota specifies a minimum octane rating of 91 for the LC in the owners manual (p. 634).
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