Which Octane do you all use?

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Sep 18, 2010 | 08:25 PM

#16

bimmertrek

Thread Starter

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Joined: Aug 2010

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It's amazing how these v10's only take 87, when my 6cyl bmw needs 89 or higher....

Sep 18, 2010 | 09:53 PM

#17

EXCURSIONATOR1

Senior User

Joined: May 2010

Posts: 364

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From: mt.prospect

The bmw has 195psi of cranking compresion.Probably has almost 200whp from a 3litre 6cyl.

Wonder how much cranking compresion a 2v v10 has?

Sep 22, 2010 | 12:33 PM

#18

under6ft

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Joined: Sep 2010

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Have any of you noticed a difference if you use 87 octane at high altitude vs using the 85 octane? I just got my new to me Excursion.

I live in Utah and we end up paying the same for 85 that everyone else can get 87 for. Best you can do at most stations is 91, Maverick is one of the few places that you have more than three choices.

Sep 22, 2010 | 02:10 PM

#19

Budman1962

Senior User

Joined: Mar 2007

Posts: 440

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From: Montana

I use 88 for daily driving. But I use 92 when towing a travel trailer.

Sep 22, 2010 | 10:17 PM

#20

dougsale

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Joined: Jun 2010

Posts: 18

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From: California

87 with no problems.

Sep 22, 2010 | 11:48 PM

#21

Sport45

Cargo Master

Joined: Apr 2003

Posts: 2,058

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From: Too close to Houston

A hundred and something thousand miles here on 87 octane "regular". No problems so far...

Sep 23, 2010 | 08:33 PM

#22

V10ZILLA

Senior User

Joined: Jun 2010

Posts: 468

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From: Canyon Country, Ca

I use 89. I like it. The V10 seems to like it. I get no complaints from the motor, not one ping outa her.

Sep 23, 2010 | 08:50 PM

#23

Rugby3

Elder User

Joined: Mar 2003

Posts: 616

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From: Farms of Duplin County

87 Here as well in my 01. No issues, I ran 93 for a few tanks to see if mileage changed at all, no difference.

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Sep 24, 2010 | 05:33 PM

#24

ptolalibertad

Mountain Pass

Joined: Nov 2005

Posts: 239

Likes: 9

From: moreno valley calif

i remember awhile back 6686 was arguing that the motor should not ping at all..mine always has.....since im always at low rpm...i fool the trans into shifting to low rpm and bearly touch the pedal for fuel economy....if im going uphill or give too much pedal it will ping...but if it shifts down then it stops...im unemployed...The x has the original cops and about 40,000 on the plugs....and i use the cheap gas..87?

Sep 30, 2010 | 11:07 AM

#25

kennethpina

Freshman User

Joined: Apr 2010

Posts: 42

Likes: 0

From: Cape Cod

I run 93 octane now but that just because I run a performance program. It ran fine before on 87

Sep 30, 2010 | 03:36 PM

#26

Stormtruck2

Freshman User

Joined: Sep 2010

Posts: 33

Likes: 0

From: Eastern Iowa

I run 87 without ethanol. Runs fine. Have tried 91 octane but sensed no difference in performance or fuel economy. Have run ethanol a couple of times and the MPG dropped 1-2 miles. Went back to straight gas.