General Car Conversation 2024 - part 1
#5851
#1 - Shell 93 V Power
#2 - Exxon 93 Synergy Supreme +
#3 - Sunoco 93 Ultra
I'll go to Royal Farms or Wawa (convenience stores) if I have to. I don't go to shady gas stations. I don't care how cheap their prices are.
Last edited by LH1; 07-17-24 at 12:34 PM.
#5852
Lexus Champion
Thankfully electricity doesn't care 👍 I can crank it out from a hand generator and it "burns" the same as electricity that came out a nuclear power plant, the difference being my arm won't hurt
Last edited by AMIRZA786; 07-17-24 at 12:38 PM.
#5853
Lexus Fanatic
The other reality is that putting 87 in the LX doesn’t mean it will perform like an LC, likely
its worse. The tune is different.
So, it’s not necessarily just “2HP” because the LC requires regular and the LX Premium and the stated difference is that. You would have to reflash the LX with the LC’s engine tune for that to be the case
The tune is a very simple change for the manufacturer to make.
its worse. The tune is different.
So, it’s not necessarily just “2HP” because the LC requires regular and the LX Premium and the stated difference is that. You would have to reflash the LX with the LC’s engine tune for that to be the case
The tune is a very simple change for the manufacturer to make.
#5854
Super Moderator
Thread Starter
Okay, so what I'm getting is there's a different torque curve and/or more oomph on premium. Not sure how much 2lb/ft are going to do, I've never had a complaint about low end torque since I bought it but yes I do want to see for myself.
I'll just use premium for the next month and report back.
I'll just use premium for the next month and report back.
#5855
Gotcha. Makes sense
Okay, so what I'm getting is there's a different torque curve and/or more oomph on premium. Not sure how much 2lb/ft are going to do, I've never had a complaint about low end torque since I bought it but yes I do want to see for myself.
I'll just use premium for the next month and report back.
@BayeauxLex I find it amusing that you have a Tundra that you use verrrrrry hard and it's fine on 87 with 230k+, then you baby the LX with the same engine.
And for everyone, isn't Exxon still good gas? That's what I usually put in the Benz.
I'll just use premium for the next month and report back.
@BayeauxLex I find it amusing that you have a Tundra that you use verrrrrry hard and it's fine on 87 with 230k+, then you baby the LX with the same engine.
And for everyone, isn't Exxon still good gas? That's what I usually put in the Benz.
I take the LX to the dealer for oil changes. The rest of the services(brakes, filters, etc.) I do myself. I service the Tundra and the rest of the vehicles myself. Why? Idk.
C'mon @BayeauxLex you should know that . If an engine isn't tuned for Premium, you're literally wasting money
Thankfully electricity doesn't care 👍 I can crank it out from a hand generator and it "burns" the same as electricity that came out a nuclear power plant, the difference being my arm won't hurt
Thankfully electricity doesn't care 👍 I can crank it out from a hand generator and it "burns" the same as electricity that came out a nuclear power plant, the difference being my arm won't hurt
I’ll try 93 next time I tow and in meantime I’ll check the Tundra forums to see if there’s any update on it.
#5856
Lexus Champion
It didn't feel any different at all... because it's the same engine. Same computer, ECU. compression, etc. If Lexus really wanted to retune that, spend the money and resources to give LX owners a meaningful difference wouldn't they give it more than 2hp??? There is no way I'm missing 40ft/lbs of torque at 2500RPM because I'm not running premium. No offense but that's absurd.
But I'll put some premium in tomorrow and run a few tanks.
Did you not watch the video of it going up the big hill and not even cresting 2k? That was in 2nd gear start, too. Gearing, yes, whatever had something to do with it.... point was it's a strong engine with lots of torque and that video confirms it.
#5857
Lexus Fanatic
It costs almost nothing for them to design a different tune for the LX, it’s just software. I can buy a module for $800 and have an entirely different tune for my car. Same ECU, different programming.
As for the torque figure being absurd, it’s right there in the dyno results lol. It’s fact. The LX tune gives you lower available torque, but you have to run premium fuel.
Have you ever driven an LC to compare? Remember it’s not like premium vs regular makes an LC and LX. The engine tune is different.
As for the torque figure being absurd, it’s right there in the dyno results lol. It’s fact. The LX tune gives you lower available torque, but you have to run premium fuel.
Have you ever driven an LC to compare? Remember it’s not like premium vs regular makes an LC and LX. The engine tune is different.
Last edited by SW17LS; 07-17-24 at 02:51 PM.
#5858
Lexus Champion
It costs almost nothing for them to design a different tune for the LX, it’s just software. I can buy a module for $800 and have an entirely different tune for my car. Same ECU, different programming.
As for the torque figure being absurd, it’s right there in the dyno results lol. It’s fact. The LX tune gives you lower available torque, but you have to run premium fuel.
Have you ever driven an LC to compare? Remember it’s not like premium vs regular makes an LC and LX. The engine tune is different.
As for the torque figure being absurd, it’s right there in the dyno results lol. It’s fact. The LX tune gives you lower available torque, but you have to run premium fuel.
Have you ever driven an LC to compare? Remember it’s not like premium vs regular makes an LC and LX. The engine tune is different.
I'll run premium and see if I can tell any difference for at least 3 tanks.
#5859
Lexus Fanatic
I am not missing 40 fl/lbs of torque at 2500 RPM bc I'm not using premium in an engine designed to run, if necessary, on rotgut fuel around the world. They don't get great gasoline where you see these things roam in a lot of cases.
I'll run premium and see if I can tell any difference for at least 3 tanks.
I'll run premium and see if I can tell any difference for at least 3 tanks.
You may not be missing that, my point is the difference in the torque curves is because of the difference in the tune. That right there is proof the cars are tuned differently. It’s not simply because of the difference in the octane. You likely are getting some of the improvement in low end performance even with the 87 octane, you’re just absolutely not getting the best performance the truck can give you with that tune and the difference is way more than 2 hp.
The trade off for the better tune in the LX is they needed to recommend premium. Putting 93 in an LC or Tundra won’t give you the torque curve of the LX, you would also need the tune. That’s what we have been trying to tell you all along.
Last edited by SW17LS; 07-17-24 at 03:15 PM.
#5860
Lexus Champion
My God.
You may not be missing that, my point is the difference in the torque curves is because of the difference in the tune. That right there is proof the cars are tuned differently. It’s not simply because of the difference in the octane. You likely are getting some of the improvement in low end performance even with the 87 octane, you’re just absolutely not getting the best performance the truck can give you with that tune and the difference is way more than 2 hp.
The trade off for the better tune in the LX is they need to recommend premium. Putting 93 in an LC or Tundra won’t give you the torque curve of the LX, you would also need the tune.
You may not be missing that, my point is the difference in the torque curves is because of the difference in the tune. That right there is proof the cars are tuned differently. It’s not simply because of the difference in the octane. You likely are getting some of the improvement in low end performance even with the 87 octane, you’re just absolutely not getting the best performance the truck can give you with that tune and the difference is way more than 2 hp.
The trade off for the better tune in the LX is they need to recommend premium. Putting 93 in an LC or Tundra won’t give you the torque curve of the LX, you would also need the tune.
Go to the link on IH8MUD and read stories for yourself. It's about split even. Again, not one report of a damaged engine from regular fuel.
There are plenty of talks about tunes.
The bolded makes zero sense. We can talk tunes etc etc but the 5.7 makes 383 horsepower on premium, up from 381 in the LC and Tundra. So how is that "way more horsepower"?
#5861
Lexus Fanatic
You’re not listening. You have multiple people here trying to explain this. That’s where the frustration is coming from. I can tell you’re not listening because the argument you keep responding to isn’t what we are saying.
The same engine can have multiple tunes in different applications. The tune in the LX has more available torque lower in the power band than the LC, that is proven by the numbers presented on the dyno graphs you were presented. People’s anecdotes mean nothing, look at the dyno graphs. Clearly these two engines have different tunes because they have different torque curves. That is why Lexus specifies the LX should run premium…it’s not marketing.
Simply using or not using 93 doesn’t create the difference in the torque curves between the two vehicles. That’s the tune.
Horsepower and torque figures advertised are peak figures. That doesn’t tell you when the power is available within the torque band. So, that’s why you may be missing a lot of power at certain points within the torque curve. You’re not missing that power peak you just may not have it available when the engineers designed it to be available because of the 87 octane fuel. The only person talking about damaging an engine is you, nobody else has suggested that would happen.
Im sorry for being frustrated with you but when multiple people are trying to explain something to somebody and they just refuse to hear what we are saying it’s very frustrating. You’re not open to what we’re saying because your mind is made up.
The same engine can have multiple tunes in different applications. The tune in the LX has more available torque lower in the power band than the LC, that is proven by the numbers presented on the dyno graphs you were presented. People’s anecdotes mean nothing, look at the dyno graphs. Clearly these two engines have different tunes because they have different torque curves. That is why Lexus specifies the LX should run premium…it’s not marketing.
Simply using or not using 93 doesn’t create the difference in the torque curves between the two vehicles. That’s the tune.
Horsepower and torque figures advertised are peak figures. That doesn’t tell you when the power is available within the torque band. So, that’s why you may be missing a lot of power at certain points within the torque curve. You’re not missing that power peak you just may not have it available when the engineers designed it to be available because of the 87 octane fuel. The only person talking about damaging an engine is you, nobody else has suggested that would happen.
Im sorry for being frustrated with you but when multiple people are trying to explain something to somebody and they just refuse to hear what we are saying it’s very frustrating. You’re not open to what we’re saying because your mind is made up.
Last edited by SW17LS; 07-17-24 at 04:02 PM.
#5862
Lexus Champion
You’re not listening. You have multiple people here trying to explain this. That’s where the frustration is coming from. I can tell you’re not listening because the argument you keep responding to isn’t what we are saying.
The same engine can have multiple tunes in different applications. The tune in the LX has more available torque lower in the power band than the LC, that is proven by the numbers presented on the dyno graphs you were presented. People’s anecdotes mean nothing, look at the dyno graphs. Clearly these two engines have different tunes because they have different torque curves. That is why Lexus specifies the LX should run premium…it’s not marketing.
Simply using or not using 93 doesn’t create the difference in the torque curves between the two vehicles. That’s the tune.
Horsepower and torque figures advertised are peak figures. That doesn’t tell you when the power is available within the torque band. So, that’s why you may be missing a lot of power at certain points within the torque curve. You’re not missing that power peak you just may not have it available when the engineers designed it to be available because of the 87 octane fuel. The only person talking about damaging an engine is you, nobody else has suggested that would happen.
Im sorry for being frustrated with you but when multiple people are trying to explain something to somebody and they just refuse to hear what we are saying it’s very frustrating. You’re not open to what we’re saying because your mind is made up.
The same engine can have multiple tunes in different applications. The tune in the LX has more available torque lower in the power band than the LC, that is proven by the numbers presented on the dyno graphs you were presented. People’s anecdotes mean nothing, look at the dyno graphs. Clearly these two engines have different tunes because they have different torque curves. That is why Lexus specifies the LX should run premium…it’s not marketing.
Simply using or not using 93 doesn’t create the difference in the torque curves between the two vehicles. That’s the tune.
Horsepower and torque figures advertised are peak figures. That doesn’t tell you when the power is available within the torque band. So, that’s why you may be missing a lot of power at certain points within the torque curve. You’re not missing that power peak you just may not have it available when the engineers designed it to be available because of the 87 octane fuel. The only person talking about damaging an engine is you, nobody else has suggested that would happen.
Im sorry for being frustrated with you but when multiple people are trying to explain something to somebody and they just refuse to hear what we are saying it’s very frustrating. You’re not open to what we’re saying because your mind is made up.
I'll see what I see with these tanks of premium but I'm not missing 40 ft/lbs of torque at 2500 RPM, that's absurd. I have run premium before and felt zero difference. I've had this truck over three years, I know it pretty well. I do feel a difference in my LS430 when I've put 87 in it before.
They stamped Lexus cladding on the LX engine cover at the factory and Toyota on the LC in Japan. I'm going down there tomorrow myself to get an answer from a master tech.
Last edited by AJT123; 07-17-24 at 04:27 PM.
#5863
Lexus Fanatic
Look at the torque curves in the provided dyno results. The difference is right there for you to see. Not sure what can be served by continuing to bang my head against the wall so I’m out. I’ll be back when the topic has moved on…maybe…
#5864
Lexus Champion
Oh, because it's 2lb/ft.
#5865
Lexus Champion
My 5.7 needs 89 to not pull timing