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#1
07-09-2007, 11:30 AM
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Do Ga$$er W126s Require Premium Unleaded?
Quick question:
Do all the W126s with Ga$$er engines require premium fuel? Like the 300SE, 300SEL, 420SEL, 500 and 560 cars - are these all supposed to be running premium? This is diesel related because we are demonstrating the difference between diesel (fuel of the gods) and putrid, reeking gasolene (fuel of the troglodytes).  Ken300D
__________________
-------------------------- 1982 300D at 351K miles 1984 300SD at 217K miles 1987 300D at 370K miles 
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#2
07-09-2007, 11:35 AM
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AFAIK, yes, all premium.
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#3
07-09-2007, 12:39 PM
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From what I can find the 3L M103 requires 91, so I would have to imagine the larger engines would be as high or higher compression ratio and therefore also require premium.
Yes, life is simpler at the dizzle pump .. 
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1987 300D, arctic white/palomino--314,000 miles 1978 240D 4-speed, Euro Delivery, light ivory/bamboo--370,000 miles 2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles 2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--19,000 miles 1982 Peugeot 505 diesel, 4-speed manual, blue/blue, 130,000 miles 1995 S320, black/parchment--34,000 miles (Dad's car)
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#4
07-09-2007, 12:55 PM
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I almost wasn't going to even answer that because you insulted the "Persian Perrier" that our cars like to sip.
In a word, however, yes, they do require premium fuel, 91 octane at the least. It is so stated in the owners manual. My car stickered at over $84,500 as a 1991 model, and it was assumed that the price of gasoline was NOT concern to the customers of a car like that when it was new. Similarly so for the other W126 cars. Chevron supreme is preferred, because of the techron additive that comes with it. It is supposed to clean out the injectors as you drive. It has worked, as advdertised, for me over 10 years, and the car is approaching 120,000 miles and the injectors have never been a problem with that car, even though I renewed the injectors at 100,000 when the timing chain was replaced.
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 1991 560 SEC AMG, 199k <---- 300 hp 10:1 ECE euro HV ... 1995 E 420, 170k "The Red Plum" (sold) 2015 BMW 535i xdrive awd Stage 1 DINAN, 6k, <----364 hp 1967 Mercury Cougar, 49k 2013 Jaguar XF, 20k <----340 hp Supercharged, All Wheel Drive  (sold)
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#5
07-09-2007, 01:03 PM
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Thanks for the information - I knew there would be experience here.
This sorta tempers my enthusiasm when I browse through the EBay ads and see the gas W126 cars. Ken300D
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-------------------------- 1982 300D at 351K miles 1984 300SD at 217K miles 1987 300D at 370K miles
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#6
07-09-2007, 01:36 PM
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Well
I can understand premium in the huge V8 and mid sized inline sixes...but the fact that if you buy a 190E 2.3...it requires premium...is shocking to me. A 130HP 2.3 4 cylinder that needs premium...my boobaru would destroy one in a straight line, had the same HP, and took regular!
I hate those cars...
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http://www.betten.mercedescenter.com...n_banner_1.jpg 1976 300D 190,000 Miles Colorado Beige 1975 300D Parts Car 78,000 Miles Rustbucket Also Colorado Beige 1984 190D 2.2 (Dad's) 156,000 miles Champagne Metallic Clearcoat
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#7
07-09-2007, 05:42 PM
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1975-1985 model year gassers do not require premium. 1986-present gassers require premium, with exception to the 1986 190E 2.3. I read that here:
http://www.chron.com/disp/story.mpl/front/4952393.html
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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate Sooner or later every car falls apart, ours does it later! -German Narrator in a MB Promotion Film about the then brand new W123.
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#8
07-09-2007, 05:57 PM
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Quote:
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-justin 1987 300TD, 1987 300TD 2008 R32, 2000 Passat Wagon
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#9
07-09-2007, 06:42 PM
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The gas station near me sells "premium high cetane" diesel....seems to give eeeeever so slightly better mpg's/power.....but they offer no credit card rewards or discounts like speedway does....so I go to speedway.
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-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#10
07-09-2007, 09:35 PM
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Read your owners manual, but most Mercedes do so its a safe assumption.
I'm getting a gas MB next time around.... 
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2016 Corvette Stingray 2LT 1969 280SE 2023 Ram 1500 2007 Tiara 3200
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#11
07-09-2007, 09:37 PM
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Quote:
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2016 Corvette Stingray 2LT 1969 280SE 2023 Ram 1500 2007 Tiara 3200
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#12
07-09-2007, 11:17 PM
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Quote:
 . . . . . . 
__________________
-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#13
07-10-2007, 09:51 AM
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diesel vs gasser
If you see the gassers in my signature - and assume what the mpg must be for both - you'll quickly understand why the 300SD is the daily driver (gets about 2x both of the other cars)!
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~shell As of 2/2010: 2001 CLK55 0o\=*=/o0 13.6 @ 106mph 10K mi 1984 300SD 260K mi and going and going... 97 S600 46K miles 1991 Sentra SE-R (extremely dorked with) www.se-r.net
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#14
07-10-2007, 10:06 AM
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My 16V takes premium. Not a big surprise. On average it costs me an extra $2.00 or $2.50 per fill-up. The car doesn't get driven daily, maybe 2-3 times per week, but if I did. I would only be paying $8-$10 extra per month over regular. The difference is not that great given the overall price of a fill-up.
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Adam Lumsden (83) 300D Vice-President of the MBCA International Stars Section
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