octane rating

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A

Amir

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i know i know. this is a just a question for grommet and not an attempt to start a war again. Grommet, what level octane are you using for your LR3?
 

grommet

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91 octane, the "recommended octane"... whenever possible. I tried 87 as an experiment twice and my MPG decreased ~2 MPG. I'm in Northern California, pretty close to sea level most of the time. In Denver and Colorado Springs, I was able to use lower octane without impact.
 
U

UnbrknCh8n

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I live in Colorado (at an elevation of about 4700 feet) and I use hi octane. I tried the mid-octane gas, but (like Grommet) lost about 2 MPG. Given grommet's experience, perhaps I'll try it again (but saving $2 a fill-up really isn't that big of a deal, ya know?)
 
A

Amir

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alright. but if 91 is not available then higher number is better then lower number, right? like 93 instead of 87 or 89.

Not worried about saving a few bucks. More concerned about, firstly, engine running up to its full specs, and second, getting more performance (but not at the expense of engine not running at its optimum).
 
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X

xcursion

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The higher the octane, the cleaner it burns and therefore better for your engine. So if you can afford it, go for it.
 

grommet

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xcursion, that's not exactly true... there is little advantage to using octane higher than what is needed. (In fact, using 91-93 in a vehicle that requires 87 may give you worse gas mileage.) But I'm not getting into another octane thread. Use search for that. :)
 
A

Amir

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haha, i dreaded that.

But seriously, with respect to LR3's V8, if I can afford it, would 93 be better for my engine and would it give me better performance, even it is ever so slightly.

(BTW, only my name is Amir guys, I wish I was a real Amir with palaces, etc. :)
 

toddjb122

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grommet said:
... I tried 87 as an experiment twice and my MPG decreased ~2 MPG. ...

Same thing happened to me. After hearing a lot of mixed reports on what octane you can use (one dealer telling a friend that you can use 87 as long as you don't hear engine knocks) I decided to try it for four tank fulls. I kept waiting for the MPG to go back up when the computer got used to the different fuel, but it never did. Dropped a solid 2 MPG and stayed there. So, I switched back... (but my MPG hasn't returned yet. ? )

In the end, the cost difference isn't worth it. If it cost me a couple hundred more over the course of the year, well, that's easily what I would pay in one shot if someone told me they could give me better MPG or engine performance. So...
 

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