Feel isn't the reason I'm bringing it up, it's the fact it's leaning on the knock sensors aka it has constant low level knock the system is dialing back timing to stay in the allowable range. Allowable meaning will make it through warranty before consuming a lot of oil

 

$97

In my 08 during its 229,300 mile life with me it never got anything other than 87. I did experiment with non ethanol gas for a while but I was going out of my way to get it.

The average person is going to put the cheapest gas the engine calls for meaning if the salesperson says it can run regular that’s what they will pump.

Majority of everyone on Tundra forums say it can run and calls for 87 and say anything more is a waste of money. Not saying they are right

 

We still run 93 in the old 2003 ES.

I just don’t buy that at all. Toyota isn’t like that. There is a performance difference on 91, however small or they wouldn’t recommend it.

 

Fortunately my 5.0 Coyote is rated to run on 87

 

I have to admit I was surprised the Denali needs premium.

6.2 knocks on 87, badly (if you're pushing it hard, at least). Midgrade it runs fine on, but I still use premium.

BTW capLess filler is the greatest thing ever.

 

I wouldn’t be surprised…the engineers said it requires Premium…they weren’t kidding lol. Why would you expect it would run okay on the wrong fuel? Other cars may run okay on the wrong fuel but you can’t expect they will.

 

The 6.2 is a bad *** engine. I assumed 87 would be ok in it but I guess not. Some LS engines are fine on 87 though.

I've been looking at trucks lately and the Sierra Denali is really impressing me.

 

so gm saying an engine requires premium is legit and lexus saying an engine require premium is just marketing. got it.

 

He is just maxing out his knock sensor usage to get his moneys worth lol!

 

I bought a new shirt. Shirt says machine wash cold with like colors. I washed it in hot water with red stuff. It came out shrunken and pink. I was shocked.

 

Why do you guys not hear me? It's the exact same engine.... In every.single.way. Every single spec. There's a years long poll and debate on IH8MUD.com and it's about 50/50. Nobody has ever reported any damage from non premium fuel.

Yes. The Denali has a completely different engine with a higher compression. Midgrade is fine but I still use premium.

5.3 is fine on regular. And yes, if I drove a pickup it would be that lol. But I'd have to have the 6.2, which the Denali has standard.

The joke is on you. If an LX570 owner wants an extra 2hp, spend $20 more a tank, that's their business.

It would have cost a fortune to make a significant retune or power bump for LX... Lexus didn't do that.

Your scenario is extreme.... that would be like putting diesel in a gas car.

 

Then why is the power curve completely different? Not just the 2hp at the top, but more torque across nearly the entire rev range?

Not sure why you think that, when it costs WELL under $1000 to get a bespoke tune developed for almost any engine out there. Yes Lexus would spend more than that making sure it works well for a wide range of samples. But we're talking low 5 figures. Not low 7 figures.

 

Said it before and I'll say it again and then drop it...

If I ever have any engine trouble or it blows, I'll report it.

There are people who have LXs with 300k that have never used a drop of premium.

 

We hear you, we just don’t agree with you. Why do you care what we think? You do you lol. My analogy isn’t extreme, both are ignoring the manufacturers recommendations. When you do that you get an unpredictable outcome. Might be fine, might not be fine.

I put the fuel in a car that the engineers say it needs for best performance. Full stop. You don’t and thats fine. It’s not only about the engine lasting for me, I want the best performance out of the car throughout my whole ownership. Thats why I use the best fuel, parts, fluids, that’s why I replace crappy OEM tires with good tires, etc. That’s me. Disagreeing with you doesn’t mean I don’t hear you.

Im cheap about some stuff too. I run on fumes to avoid filling up on a day that’s not Tuesday because Shell has 20c off premium. That saves me $2-4 a tank lol. I’m not going to use lower quality fuel or the wrong fuel as per the manufacturers recommendations to save money though.

 

When I used the G37 forums there was a guy than ran 87 on the VQ37VHR. Premium was required but he never had any issues and he had 200k miles.