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View Poll Results: I have a vehicle with a turbocharged (not supercharged) gasoline engine, and:
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The owner's manual requires that I use premium gasoline (octane rating above 87)
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14 |
37.84% |
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The owner's manual recommends but does not require that I use premium gasoline (octane rating above 87)
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6 |
16.22% |
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The owner's manual is silent as to the grade of gasoline or says to use regular (min 87 octane)
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12 |
32.43% |
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I have a turbodiesel or superchared vehicle so options 1-3 do not apply.
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3 |
8.11% |
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I would have worded the poll questions differently and/or included other options.
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2 |
5.41% |
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12-15-2018, 12:27 PM
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#21
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Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
Join Date: Sep 2005
Location: Northern IL
Posts: 26,892
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Did not want to disappoint, especially this close to Christmas!  ( and I did edit my post slightly while you typed, I did misread one of the questions the first go around - my bad)
No point in stopping there  ). I see that so far we are running about even on premium/regular for turbos. Still a small sample though, ~ 5 for premium and 7 regular.
But what % of non-turbos would we get a report of premium?
And does using a Tesla Supercharger count? Oh, never mind, you said turbo-charger. Wait, what if it was powered by wind turbines? 
-ERD50
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12-15-2018, 12:54 PM
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#22
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Give me a museum and I'll fill it. (Picasso)
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Join Date: May 2008
Posts: 7,438
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I leased a BMW X3 a couple of months ago, my first car with a turbo.
I've seen discussions about what kind of gas you have to use, with different opinions about what's required.
Since it's a lease, I could use the lowest-grade fuel but I go for the mid grade.
And no I didn't look at the manual. Car manuals are ridiculously thick now.
There is a BMW Genius app. that I checked out but it's pretty useless..
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12-15-2018, 01:15 PM
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#23
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Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
Join Date: Jan 2018
Location: Tampa
Posts: 11,298
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My manual calls for premium and it does make a difference for the sports car. Up North, I would on occasion find 94 rated gas.
__________________
TGIM
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12-15-2018, 01:46 PM
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#24
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Thinks s/he gets paid by the post
Join Date: Feb 2007
Location: Upstate
Posts: 2,951
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 Quote:
Originally Posted by Donno
I have a Ford F-150 with the 3.5 ecoboost and usually run 87 octane in it except when towing, which they recommend using 91 octane or higher.
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Me too. So which poll category does that put us in?
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12-15-2018, 02:09 PM
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#25
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gone traveling
Join Date: Dec 2015
Location: Berkeley, Denver, CO, USA
Posts: 1,406
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Audi says premium gasoline.
Bogleheads say Top Tier gasoline. https://www.toptiergas.com
So, premium Top Tierwhat I buy.
At <250 gallons (US) per year, I don't care about price.
If I cared about price, I would buy from Costco instead of Valero (which is way more convenient).
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12-15-2018, 05:18 PM
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#26
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Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
Join Date: Nov 2010
Location: Sarasota, FL & Vermont
Posts: 36,373
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Quote:
Originally Posted by RunningBum
Didn't vote, because I don't currently have a turbo, but near the top of my "next car" candidate list is the Subaru Ascent (4cyl turbo), and it only requires 87 octane.
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Quote:
Originally Posted by aaronc879
Do you frequently have more than 4 people in your car? That is the only reason I can imagine people would buy that vehicle.
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We currently have an Outback and love it. However, 4 people and 4 sets of golf clubs is doable, but a bit inconvenient compared to our friends' Explorer and Enclave... so I'll consider the Ascent, Atlas, Pilot and other 3 row seating vehicles when we trade in the Outback.
Also, there are times when it would be nice to have the extra seating.... say, when there are six of us going out to dinner or an event and parking will be hard to find then one vehicle is better than two... also, you only need one designated driver.
__________________
If something cannot endure laughter.... it cannot endure.
Patience is the art of concealing your impatience.
Slow and steady wins the race.
Retired Jan 2012 at age 56
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12-15-2018, 05:45 PM
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#27
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Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
Join Date: Jun 2016
Location: Colorado
Posts: 8,971
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My Rubicon turbo manual says to use at least 87, but for optimal use 91.
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12-15-2018, 06:09 PM
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#28
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Dryer sheet wannabe
Join Date: Nov 2015
Posts: 11
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plus 1 on tier-1 gas! no matter what grade you use.
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12-15-2018, 06:20 PM
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#29
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Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
Join Date: Jan 2006
Posts: 5,350
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Quote:
Originally Posted by xretro
plus 1 on tier-1 gas! no matter what grade you use.
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I never even heard the term "tier-1" gas before reading this thread.
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12-15-2018, 06:30 PM
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#30
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Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
Join Date: May 2008
Posts: 7,438
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Me neither.
Maybe it's gas which is fortunate enough not to have corn ethanol?
No that was a federal mandate so that crap is in nationwide.
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12-15-2018, 06:33 PM
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#31
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Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
Join Date: Sep 2005
Location: Northern IL
Posts: 26,892
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Here ya go:
http://bestride.com/wp-content/uploa...odel-years.pdf
I'll leave it to someone else to sort turbo/non-turbo and %.
-ERD50
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12-15-2018, 06:47 PM
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#32
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Thinks s/he gets paid by the post
Join Date: Jan 2011
Location: Fair Lawn
Posts: 2,963
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Quote:
Originally Posted by davebarnes
Audi says premium gasoline.
Bogleheads say Tier-1 gasoline.
So, premium Tier-1 is what I buy.
At <250 gallons (US) per year, I don't care about price.
If I cared about price, I would buy from Costco instead of Valero (which is way more convenient).
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Quite a few years ago I bought an Infiniti G35 coupe that required premium. It took about 2 fill-ups before I no longer worried about paying the extra $$ for premium. I now drive an Audi Q5, 2.0 Turbo that requires 91 Octane Premium, But around here Premium is 93 Octane. I only fill up with Top Tier gas (per Audi recommendations).
If my last fill-up was with Premium, AND I'm near a Top Tier gas station when my tank is half-full, I'll fill up with 89 Octane mid-grade. I don't go crazy about this, though.
Audi's (and all German cars, I believe) are reportedly very expensive for repairs. So for me using Audi recommended brands and Octane levels is a preventive measure. ....and I use about 700 gallons a year.
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12-15-2018, 07:02 PM
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#33
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Thinks s/he gets paid by the post
Join Date: Sep 2011
Location: Placerville
Posts: 1,788
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I'm looking at getting a 2019 Subaru Ascent. Comes stock with a 2.4L turbo motor and states it takes regular fuel.
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12-15-2018, 07:25 PM
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#34
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Thinks s/he gets paid by the post
Join Date: Jun 2017
Location: Western NC
Posts: 4,633
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Quote:
Originally Posted by skipro33
I'm looking at getting a 2019 Subaru Ascent. Comes stock with a 2.4L turbo motor and states it takes regular fuel.
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Plan on paying full price.
Went with a relative to look at a 2019 Forester...those are popular but the dealer literally can't keep a single Ascent on the lot.
Might have something to do with the 14" of snow we got last Sunday...
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12-15-2018, 07:27 PM
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#35
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Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
Join Date: Jan 2006
Posts: 5,350
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Quote:
Originally Posted by ncbill
Plan on paying full price.
Went with a relative to look at a 2019 Forester...those are popular but the dealer literally can't keep a single Ascent on the lot.
Might have something to do with the 14" of snow we got last Sunday...
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Who are all of these people who can afford to spend $40K on a car?
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12-15-2018, 09:27 PM
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#36
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Thinks s/he gets paid by the post
Join Date: Sep 2011
Location: Placerville
Posts: 1,788
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Quote:
Originally Posted by aaronc879
Who are all of these people who can afford to spend $40K on a car?
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I applied for SS early. 
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12-17-2018, 03:00 PM
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#37
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Thinks s/he gets paid by the post
Join Date: Jul 2013
Posts: 1,046
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I'd be surprise if not all new engines can compensate for lower grade fuel by dynamically adjusting the ignition timing. The reason you need higher octane in turbo engines is due to higher temps and increased pressures inside the cylinders. Lower octane burns too quickly causing pre-detonation. Higher octane allows for optimum timing which results in better output/performance. However, going from 93 to 87 isn't going to cause any issues other than lower performance which you might not even notice unless you're really pushing it (towing, drag racing, WOT uphill etc).
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