08-21-2016, 01:33 PM
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#1
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Registered User
Join Date: Oct 2008
Location: Ohio
Posts: 868
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Gasoline/Petrol Preference
After 8 years on this forum I know that a quick way to get a "discussion" going is to talk about oil or tires. However, I've not seen anything about gasoline preferences. Without getting too technical about additives, etc., how about some discussion about your favorite brand of gasoline and why. I prefer Shell simply because I'm a sucker for advertising hype, and my P car seems to enjoy it -- along with a regular dose of Techron. How about you?
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08-21-2016, 01:51 PM
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#2
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still plays with cars...
Join Date: May 2011
Location: Baden, ON, Canada
Posts: 1,087
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I use Petro Canada Ultra 94 whenever I can.
The only 93+ octane fuel I can find locally.
Maybe it's just me, but I swear the Boxster pulls harder when running on more than 91 octane.
__________________
Six speed 2000 Boxster S
Arctic Silver on Metropol Blue | LN Dual Row IMSR | Arctic Silver console, spoiler frame & bumperettes | Crios mod | Technobrace | RoboTop module & modified convertible top relay for one-touch roof operation
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08-21-2016, 02:08 PM
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#3
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Certified Boxster Addict
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,669
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In Commiefornia, we're limited to 91, so I buy from whatever station I happen to drive by.
__________________
1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
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08-21-2016, 02:54 PM
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#4
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Custom User Title Here
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,163
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BP 93 octane. Definitely notice a power loss on 91. 
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08-21-2016, 03:12 PM
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#5
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Registered User
Join Date: Dec 2008
Location: Queensland, Australia
Posts: 1,522
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The cheapest 98 octane that I can buy - no allegiance to any brand but if I do have a preference it would be Shell purely because of their motor sport involvement since before the war.
But I do have a liking for Shell oils - I've use Helix Ultra 5W40 virtually since day one....
__________________
2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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08-21-2016, 04:25 PM
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#6
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Boxing in Australia
Join Date: Apr 2016
Location: Melbourne
Posts: 78
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Only use 98, any brand but usually Shell because station is local and have Supermarket discount dockets.
I would be concerned about using less than 95 octane in any engine with 11 to 1 compression ratio,
Cheers from down-under.
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08-21-2016, 06:06 PM
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#7
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Registered User
Join Date: May 2013
Location: North Alabama
Posts: 2,079
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Shell and Chevron
I buy these two thew most, occasionally I will buy brand X at Sams Club
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08-21-2016, 06:22 PM
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#8
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Registered User
Join Date: Sep 2008
Location: Florida
Posts: 2,492
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Sam's Club 93 octane.
Last edited by dghii; 08-21-2016 at 06:23 PM.
Reason: spelling
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08-21-2016, 07:08 PM
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#9
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Registered User
Join Date: Jan 2007
Location: BC
Posts: 1,312
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Chevron 94 (with Techron built in). 
__________________
2001 Boxster, 5 spd, Seal Grey
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08-21-2016, 07:10 PM
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#10
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Registered User
Join Date: Aug 2014
Location: Melbourne
Posts: 136
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Shell 98. My Box seems to perform better in this compared to other makes.
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Boxster Base, 2002 Manual, Black.
LN Single Row Pro IMS retrofit.
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08-21-2016, 07:50 PM
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#11
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Custom User Title Here
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,163
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Ok, you Aussies and Europeans are just making this confusing 
To be clear, in the US and Canada, we use an average of MON and RON (M+R/2), Australia and most of Europe use only RON. MON is taken at higher RPM, so is typically 8-12 points lower than RON. In other words, M+R/2 measurement is usually 4-6 points lower than RON alone.
Our 93 octane is the same as your 97-99 octane
Last edited by particlewave; 08-21-2016 at 07:52 PM.
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08-21-2016, 08:57 PM
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#12
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Boxing in Australia
Join Date: Apr 2016
Location: Melbourne
Posts: 78
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Thanks for the clarification
Thanks for sorting that out, I was surprised that there were no reports of holed Pistons in the US if you were using 91 octane in you Boxsters.
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08-21-2016, 10:17 PM
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#13
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Registered User
Join Date: Jun 2014
Location: LB, Germany
Posts: 1,456
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Hello,
so from a european point of view: 
Normal/Benzin Bleifrei min. 91 ROZ 82,5 MOZ -> 86,75 AON
Super/Bleifrei 95 min. 95 ROZ 85 MOZ -> 90 AON
SuperPlus/Bleifrei 98 min. 98 ROZ 88 MOZ -> 93 AON
Shell V-Power 100+ min. 100 ROZ 88 MOZ -> 94 AON
Aral/BP Ultimate 102 min. 102 ROZ 88 MOZ -> 95 AON
And the car does also drive with 91 ROZ. ECU adapts that, no problem. But you loose some HP. For Germany SuperPlus 98 ROZ is recommended.
Regards, Markus
Last edited by Smallblock454; 08-21-2016 at 10:22 PM.
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08-21-2016, 10:18 PM
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#14
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Registered User
Join Date: Sep 2013
Location: Chandler, AZ
Posts: 1,796
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91 is the best we have here in Arizona/west coast. It's friggin annoying. I get my gas at any station who's gas is "Top Tier" and has the best price. That's either Costco, Arco or QuickTrip. The base gas is all the same (we get out gas from two refineries either in SoCal or Texas) and then each brand add in their additives.
If I want the really good stuff there's a gas station that has racing gas close the Wild Horse Pass race track ((Boundurant's Driving Schools is based there) which is 8 miles from my home.
__________________
03 Carrera
02 Boxster S Guards Red, black interior with matching hardtop
89 Carrera 4
89 944 S2
78 911SC
Last edited by Porsche9; 08-21-2016 at 10:22 PM.
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08-21-2016, 10:24 PM
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#15
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Registered User
Join Date: Sep 2013
Location: Chandler, AZ
Posts: 1,796
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Quote:
Originally Posted by Smallblock454
Hello,
so from a european point of view:
Normal/Benzin Bleifrei min. 91 ROZ 82,5 MOZ -> 86,75 AON
Super/Bleifrei 95 min. 95 ROZ 85 MOZ -> 90 AON
SuperPlus/Bleifrei 98 min. 98 ROZ 88 MOZ -> 93 AON
Shell V-Power 100+ min. 100 ROZ 88 MOZ -> 94 AON
Aral/BP Ultimate 102 min. 102 ROZ 88 MOZ -> 95 AON
And the car does also drive with 91 ROZ. ECU adapts that, no problem.
Regards, Markus |
Bleifrei? Is leaded gas still even available in Europe? In the US the term unleaded has been dropped some time ago to reflect leaded gas not even being available.
__________________
03 Carrera
02 Boxster S Guards Red, black interior with matching hardtop
89 Carrera 4
89 944 S2
78 911SC
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08-22-2016, 02:51 AM
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#16
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Registered User
Join Date: Jun 2014
Location: LB, Germany
Posts: 1,456
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Hello Porsche9,
no, every of the listed fuels is unleaded today. Since 1988 leaded fuels are forbidden in Germany. Unleaded fuels were introduced in 1984. Ethanol added fuels E5 (5%) and E10 (10%) were introduced around 2009.
Normal 91ROZ and Super 95ROZ always has 5% ethanol over here. There is also Super 95ROZ with 10% Ethanol available. That is called E10.
There is also E85 available. Which means 85% ethanol. But you need an engine and fuel system that is modified for that kind of fuel.
Regards, Markus
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08-23-2016, 01:30 PM
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#17
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Registered User
Join Date: Jan 2016
Location: CO
Posts: 126
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This thread is somewhat meaningless...
Every state (almost) has different gasoline formulas.
And they also vary seasonally.
Not to mention other countries.
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08-23-2016, 03:23 PM
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#18
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Registered User
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,709
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When i worked at Saleen & later Shelby American, assisting in the new vehicle EPA certification process, each company hired an engineer that specialized in EPA certification. Both engineers insisted nothing but Chevron Supreme went in the gas tank.
That's what I use, 91 octane in CA. When I drove my Box from CA to TX & back, I tried some Amaco premium 94 octane which made a very noticeable improvement.
__________________
OE engine rebuilt,3.6 litre LN Engineering billet sleeves,triple row IMSB,LN rods. Deep sump oil pan with DT40 oil.
Last edited by BYprodriver; 08-23-2016 at 03:23 PM.
Reason: sp.
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08-23-2016, 07:53 PM
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#19
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Registered User
Join Date: Feb 2016
Location: St. Charles, IL
Posts: 39
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93 octane from Costco. Includes ethanol so I only get 18-19 mpg.
__________________
Guards Red Boxster S, born in Germany May 2004. LN spin on filter, litronics, roll bar mesh, wind deflector. Pioneer AVH-4200 hu, rear shelf box with speakers installed. 36k miles.
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08-23-2016, 09:10 PM
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#20
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Registered User
Join Date: Sep 2013
Location: Chandler, AZ
Posts: 1,796
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Quote:
Originally Posted by Smallblock454
Hello Porsche9,
no, every of the listed fuels is unleaded today. Since 1988 leaded fuels are forbidden in Germany. Unleaded fuels were introduced in 1984. Ethanol added fuels E5 (5%) and E10 (10%) were introduced around 2009.
Normal 91ROZ and Super 95ROZ always has 5% ethanol over here. There is also Super 95ROZ with 10% Ethanol available. That is called E10.
There is also E85 available. Which means 85% ethanol. But you need an engine and fuel system that is modified for that kind of fuel.
Regards, Markus
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Thanks for the details. Why do they still bother with the term Bleifrei still? It all been Bleifrei for almost 30 years.
__________________
03 Carrera
02 Boxster S Guards Red, black interior with matching hardtop
89 Carrera 4
89 944 S2
78 911SC
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