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Old 03-05-2006, 09:42 PM   #1
97th Signalman
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Default Premium fuel requirement

We are considering the purchase of a Tribeca. However, we are somewhat put off by the requirement for premium fuel at today's fuel prices.

The alternate vehicle we are looking at is the Nissan Murrano. That car has an anti-knock sensor that permits the use of 87 octane fuel (91 octane is reccommended) with slightly reduced performance. I was hoping that the same thing could be done with the B9 Tribeca.

Does the Tribeca have an anti-knock sensor that would accommodate 87 octane (regular) fuel or is premium (91 octane) an absolute requirement? Are any of the forum members using 87 octane regular gas? If so, what have your experiences been?
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Old 03-05-2006, 09:50 PM   #2
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Yes it has knock sensors, it says premium is recommended not required (like my Turbo motor) In our OB w/ the H6 it said the same thing and unless we were driving long distance w/ a lot of crap in the car we ran 89 most of the time. It's just that you won't get the best performance. The pic is from the owners manual
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Old 03-05-2006, 09:52 PM   #3
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All modern cars have anti-knocking sensors. For B9, premium is recommeded but not required. Same story as Nissan.
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Old 03-06-2006, 12:37 AM   #4
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I really noticed the difference when using 89 as opposed to 91/92. And really..its only IF completely empty about $1.80 difference. I have that much change in the bottem of my console.
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Old 03-06-2006, 12:48 AM   #5
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the differfence in price really is not that much...suck it up and be nice to your engine
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Old 03-06-2006, 02:22 PM   #6
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I recently went on a 3000 mile trip. 500miles on 87octane. Bad mileage 17-18miles/gal.
Switched to 93 Octane 21-22miles/gal. I was pulling a motorcycle trailer with a 600lb load. Two dogs, myself, my wife and child. I noticed knocking when i bliped the throttle backing it up at the Hotels with 87. Awesome car though.
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Old 03-13-2006, 12:42 PM   #7
brixity
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News

Premium fuel is no longer required in the Tribecas. Subaru has done extensinve research and recently sent out memos to all dealerships stating that 91+ octane is no longer necessary. I was running midgrade for a while but since the announcement have been running regular and no issues. i'm getting 20.3mpg mixed city and highway.
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Old 03-13-2006, 11:51 PM   #8
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Quote:
Originally Posted by brixity
Subaru has done extensinve research and recently sent out memos to all dealerships stating that 91+ octane is no longer necessary.

Great news, but what is the source of this information?
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Old 03-14-2006, 06:13 PM   #9
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Quote:
Originally Posted by 3rdsub
Great news, but what is the source of this information?
If he says "The Dealer Told me..." i'm going to smack him.
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Old 03-14-2006, 10:49 PM   #10
brixity
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Quote:
Originally Posted by 3rdsub
Great news, but what is the source of this information?
Subaru training at their facility in Westampton, NJ on March 7, 2006 on top of a memo from Subaru North America sounds credible enough don't you think? Also if you want I can scan the memo and post it on here.
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Old 03-14-2006, 10:49 PM   #11
brixity
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Thumbs up

Quote:
Originally Posted by SoDealer
If he says "The Dealer Told me..." i'm going to smack him.

I am the dealer biaaaaatch just like you... so come smack the kid. Read the above post and get that product knowledge up to date. Don't know if you need it out there but it's come in handy here. SoDealer.

BTW How many sales people on your floor??

Last edited by brixity; 03-15-2006 at 10:35 AM.
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Old 03-15-2006, 12:41 PM   #12
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Quote:
Originally Posted by brixity
I am the dealer biaaaaatch just like you... so come smack the kid. Read the above post and get that product knowledge up to date. Don't know if you need it out there but it's come in handy here. SoDealer.

BTW How many sales people on your floor??
I don't work at a dealership... I'm in some other capacity

and scan please.
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Old 03-15-2006, 02:18 PM   #13
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Hi,

I've been using mid-grade, 89 octane fuel since I got my Tribeca six weeks ago. The only issue I have is that when I'm going at a good pace (highway or street) if I give it throttle to pass it takes almost a full second for the vehicle to respond. Then she goes like a race car. Anybody else experience this? I haven't tried premium fuel yet but will using 93 octane (no 91 in NYC) negate this effect?

Thanks,

Joe
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Old 03-15-2006, 04:19 PM   #14
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Quote:
Originally Posted by nycb9
Hi,

I've been using mid-grade, 89 octane fuel since I got my Tribeca six weeks ago. The only issue I have is that when I'm going at a good pace (highway or street) if I give it throttle to pass it takes almost a full second for the vehicle to respond. Then she goes like a race car. Anybody else experience this? I haven't tried premium fuel yet but will using 93 octane (no 91 in NYC) negate this effect?

Thanks,

Joe
Tribeca makes 250 hp @ 6,600 rpms. Next time you get a chance watch your tach and see where you are getting your "oomph"
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Old 03-15-2006, 04:31 PM   #15
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I'd be more interested in the torque curve
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Old 03-15-2006, 05:26 PM   #16
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Quote:
Originally Posted by Peaty
I'd be more interested in the torque curve
I'm at a loss on where to find that for a Tribeca... but definitely an interesting notion.
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Old 03-15-2006, 10:05 PM   #17
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Tribeca only has similar peak torque (219lb-ft) of a 2.0 Turbo WRX (217 lb-ft) with 1,000-lb more weight. This car seriously needs more torque at low RPM. If you use lower grade gas, you will get even less power. IIRC, some one tested with an original 3.0 H-6 (212 hp)in OB VDC model. 87 gas causes about 10 hp loss to the engine vs 93.
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Old 03-15-2006, 11:39 PM   #18
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Maybe I didn't explain it clearly enough? What I'm talking about is a serious "throttle delay". The engine doesn't respond at all until almost a second after I give it a moderate amount of gas. Then it takes off like a rocket. This only happens when it's already moving at a good pace - highway or street. Does not happen "off the line."

Thanks again...Joe
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Old 03-16-2006, 03:43 AM   #19
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Quote:
Originally Posted by nycb9
Maybe I didn't explain it clearly enough? What I'm talking about is a serious "throttle delay". The engine doesn't respond at all until almost a second after I give it a moderate amount of gas. Then it takes off like a rocket. This only happens when it's already moving at a good pace - highway or street. Does not happen "off the line."

Thanks again...Joe
that's why i was saying watch your RPM's. The H6 almost seems like a turbo engine with turbo lag because it makes it's power so high up in the RPM range. on the highway is when HP rules over torque. I bet you the engine is revving until it hits the HP sweet spot in that 6,600k range. the next time you're punching it on the highway... watch and see if that's the case..
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Old 03-16-2006, 10:06 AM   #20
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Moderate your gas paddel to match the engine instead of floor it gives better results in accelerations (soomth and faster). That's what you need to drive for every car that has HP but lacks torque.
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Old 03-28-2006, 09:31 PM   #21
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Sounds like "automatic transmission" delay to me. Any truth to that?
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Old 08-05-2006, 11:05 PM   #22
brixity
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tribecas all have that delay before it kicks. i have driven 4 bangers all my life and i've noticed 6's have a small delay but the beca's is by far the longes delay i have experienced.
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Old 08-06-2006, 01:40 AM   #23
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Quote:
Originally Posted by nycb9
The only issue I have is that when I'm going at a good pace (highway or street) if I give it throttle to pass it takes almost a full second for the vehicle to respond. Then she goes like a race car.
On Freeways, unless its stop and go, use "Sport" mode's "D" setting (NON-shifting). This takes care of a lot of the stumbling.
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Old 08-09-2006, 04:11 PM   #24
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Quote:
Originally Posted by HB_Dad
On Freeways, unless its stop and go, use "Sport" mode's "D" setting (NON-shifting). This takes care of a lot of the stumbling.
+1 on the "sport" setting. It works great in my 05 Outback 3.0R. It is very quick to drop down a gear or two to provide the extra kick. My only complain is that after you complete the pass and let off the gas alittle, the tranny seems to hold the lower gear a little longer than I would like. It's almost like downshifting in a manual. You can get rid of this my bumping the stick back over to "D".
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Old 08-12-2006, 02:36 AM   #25
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Quote:
Originally Posted by MBasile
the differfence in price really is not that much...suck it up and be nice to your engine
Agreed, I think at and average of about 10 cents a gallon more (than mid) here in Southern California, I think I can splurge another $1.30 for a full tank...
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