Recent Topics
WEC (incl LeMans) to be broadcast by Velocity & MT
by Indydriver
04/24/18 04:59 AM
ILLEGAL
by MrQuackers
04/24/18 04:15 AM
Really nice 1979 Holden Commodore
by Shannow
04/24/18 03:39 AM
Smith & Wesson M&P Shield
by PW01
04/24/18 02:41 AM
Relationship between VI and VII
by OilUzer
04/24/18 01:39 AM
News in Kansas
by Marco620
04/24/18 12:11 AM
Amsoil EAO 80 Cut Open (26500 miles)
by A310
04/23/18 11:29 PM
1965 Buda D175 Rotella 15W40
by A310
04/23/18 11:16 PM
So... kinda mad at Ford right now!
by SubieRubyRoo
04/23/18 10:20 PM
Mopar MO-349, 6k miles - C&P
by webfors
04/23/18 08:50 PM
2005 Accord V6 Steering Wobble (low speed only)
by JEL01
04/23/18 08:34 PM
EcoTec Filter suggestions?
by GMWeber
04/23/18 08:21 PM
Occasional brake noise??
by blupupher
04/23/18 08:11 PM
Ford Duratec 2.5L - 5w-20 vs 5w-30?
by dogememe
04/23/18 08:03 PM
New tires quicker to feather?
by supton
04/23/18 07:38 PM
mc fl500S CUT OPEN
by car51
04/23/18 07:34 PM
ACDelco UPF 64 CUT OPEN
by car51
04/23/18 07:26 PM
New Rotellas.. late to the game ...
by webfors
04/23/18 07:23 PM
2012 Ram 2500 Diesel Balljoints
by Bighorn2500
04/23/18 07:21 PM
Pennzoil Synthetic 19.97
by Marco620
04/23/18 07:07 PM
Newest Members
vvillarr, initialjc, rickpa1, CoolShirtDude, Gee_Luva
64829 Registered Users
Who's Online
46 registered (Artem, alarmguy, Billbert, 87sammy, 2015_PSD, bbhero, 2 invisible), 625 Guests and 36 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
64829 Members
68 Forums
282238 Topics
4711891 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Page 1 of 4 1 2 3 4 >
Topic Options
#4720949 - 04/08/18 09:09 PM MB gasoline - regular vs premium
MaximaGuy Offline


Registered: 09/20/03
Posts: 1167
Loc: Austin, TX
The MB from my signature calls for premium gas, was wondering why regular won't work.

Other owners chime in - other than premium results is less knock, anything out of the ordinary that regular fuel won't work.
_________________________
2018 MB GLE350
2011 Lexus ES350
2006 Toyota Highlander 4WD

Top
#4720955 - 04/08/18 09:16 PM Re: MB gasoline - regular vs premium [Re: MaximaGuy]
Aichiguy Offline


Registered: 08/10/17
Posts: 70
Loc: Iowa
Knock can damage an engine. Surely on an 18 there's a knock sensor that causes the computer to retard timing to alleviate this which would result in lower performance.
_________________________
2017 Toyota Camry 2.5
2011 Toyota Camry 2.5 75k
2003 Toyota Camry 2.4 201 k
1999 Ford F150 4.6 70k

Top
#4720957 - 04/08/18 09:16 PM Re: MB gasoline - regular vs premium [Re: MaximaGuy]
Nick1994 Offline


Registered: 02/19/13
Posts: 9830
Loc: Phoenix, AZ
12:1 compression ratio, and a price tag that start at like $60k.
_________________________
2015 Hyundai Sonata 2.4L 76k PU 5w30 & OEM
2000 Toyota Camry 2.2L 227k M1 AFE 0w30 & Wix
1996 Jeep Cherokee 4.0L 145k M1 HM 10w40 & Fram Ultra

Top
#4720960 - 04/08/18 09:18 PM Re: MB gasoline - regular vs premium [Re: MaximaGuy]
bbhero Online   content


Registered: 03/20/15
Posts: 4388
Loc: Virginia
Ahh a higher compression motor is very likely the reason for needing the higher octane gas. And if you have money to buy or lease a MB then why worry about an extra 50-60 cents a gallon. A extra $10-13 per fill up from dead empty really going to break the bank for you?? I hope not.

I do not mean to give you a hard time here. Just thinking about it all. Really difficult to understand why when people buy or lease a expensive vehicle they suddenly cringe about having to put "expensive" gas in the expensive vehicle they just bought or leased. And don't expect your tires or other needs for that vehicle won't be expensive as well. Because they very likely will be.


Edited by bbhero (04/08/18 09:21 PM)
_________________________
Nissan Altima 3.5 Coupe
Havoline Pro DS 5w30 Federated Auto 4612ex
"Treat your family like your friends and treat your friends like your family."

Top
#4720971 - 04/08/18 09:23 PM Re: MB gasoline - regular vs premium [Re: MaximaGuy]
MaximaGuy Offline


Registered: 09/20/03
Posts: 1167
Loc: Austin, TX
Concur its not breaking my wallet.
BTW knock and retardation is under load or heavy acceleration and regular driving conditions one never knocks under normal loading.
Curious if the vehicle is designed to only take premium, my Lexus takes regular
_________________________
2018 MB GLE350
2011 Lexus ES350
2006 Toyota Highlander 4WD

Top
#4720981 - 04/08/18 09:29 PM Re: MB gasoline - regular vs premium [Re: MaximaGuy]
Wolf359 Offline


Registered: 04/27/12
Posts: 4486
Loc: MA
Yes, just read the manual. Says minimum octane is 91. Not sure if Texas has 93 or 91. If you had 93, you could make a mix of regular super to get 91. There's usually a section in the manual that says if 91 isn't available, use 87, but not to give it wide open throttle and use a light throttle and fill up as soon as possible with super.

Top
#4720983 - 04/08/18 09:31 PM Re: MB gasoline - regular vs premium [Re: MaximaGuy]
madRiver Offline


Registered: 07/11/15
Posts: 3311
Loc: New England
Besides the power loss expect a mpg loss of vehicle requires premium.

Top
#4720990 - 04/08/18 09:41 PM Re: MB gasoline - regular vs premium [Re: MaximaGuy]
bbhero Online   content


Registered: 03/20/15
Posts: 4388
Loc: Virginia
Still it is a higher compression motor... Being that is what it is.. it could very possibly knock even under "regular" acceleration if running regular gas in a motor with that high a compression. Heck my Nissan Altima 3.5 VQ has a 10.4:1 compression motor and it is set to run the best on 93. Says so in the manual. I'm glad that extra $10-12 ain't hurting you too bad at all. That's a very good thing smile
_________________________
Nissan Altima 3.5 Coupe
Havoline Pro DS 5w30 Federated Auto 4612ex
"Treat your family like your friends and treat your friends like your family."

Top
#4720997 - 04/08/18 09:55 PM Re: MB gasoline - regular vs premium [Re: MaximaGuy]
slacktide_bitog Offline


Registered: 03/20/08
Posts: 5845
Loc: USA
It's DI. Use premium

Top
#4721000 - 04/08/18 09:58 PM Re: MB gasoline - regular vs premium [Re: MaximaGuy]
Trav Offline


Registered: 11/20/06
Posts: 18249
Loc: MA, Mittelfranken.de
Questions like effects of detonation on direct injectors and combustion chamber deposits due to retarded ignition timing come to mind.
_________________________
ASE L1, Master. Deutsch Meisterbrief.

Top
#4721004 - 04/08/18 10:02 PM Re: MB gasoline - regular vs premium [Re: MaximaGuy]
aquariuscsm Offline


Registered: 12/30/06
Posts: 17930
Loc: South Texas,USA
Your engine will ping under heavy acceleration on regular unleaded.
_________________________
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Pennzoil Platinum 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Pennzoil Platinum 0W20



Top
#4721014 - 04/08/18 10:14 PM Re: MB gasoline - regular vs premium [Re: MaximaGuy]
Stevie Offline


Registered: 11/08/04
Posts: 139
Loc: Port Aransas, TX
Originally Posted By: MaximaGuy
The MB from my signature calls for premium gas, was wondering why regular won't work.

Other owners chime in - other than premium results is less knock, anything out of the ordinary that regular fuel won't work.


My Last MB SLK Supercharged the owners manual said only use premium or engine damage "WILL" occur.

My 2013 SLK says use premium fuel.

It's a Mercedes! Use premium and enjoy the premium ride.

Top
#4721033 - 04/08/18 10:39 PM Re: MB gasoline - regular vs premium [Re: MaximaGuy]
oldhp Offline


Registered: 06/28/12
Posts: 1546
Loc: USA
24.6 gallon fuel tank. Lets say you let it run down to 4.6 gals in the tank. Manual says 91 or higher octane fuel. So if you mix 6 gals 87 octane plus 14 gals 93 fuel you get 91 octane, and you save $3.00 per tank figuring .50 cents a gal savings. At $3.00 per tank per week, 52 weeks a year you would save $156.00 a year. I don't about you, but having to mix fuel to save $156.00 ain't worth it. grin
_________________________


Top
#4721060 - 04/08/18 11:05 PM Re: MB gasoline - regular vs premium [Re: MaximaGuy]
NoNameJoe Offline


Registered: 06/03/15
Posts: 358
Loc: New York
Quote:
BTW knock and retardation is under load or heavy acceleration and regular driving conditions one never knocks under normal loading.

What's "regular driving conditions"? Because you know it's not just the car but also a host of other variables that are different.

Like summer and winter blends and even the temperature of the engine, fuel or air which is seasonal. If they designed it for 91, going to 87 may not be enough to account for other variables.

Top
#4721063 - 04/08/18 11:07 PM Re: MB gasoline - regular vs premium [Re: MaximaGuy]
ruhroh Offline


Registered: 12/11/16
Posts: 98
Loc: NC
Your car will adjust the timing to prevent knock, but the small fuel economy loss might take out the savings from not running plus/premium anyway.

Top
Page 1 of 4 1 2 3 4 >