Are all Premium fuels created equal?
Are all Premium fuels created equal?
MBWorld Fanatic!
Joined: Jun 2011
Posts: 2,119
Likes: 271
'13 GLK350 4matic,'10 C207,'15 GLA250,'07 Honda Odyssey, '18 GLE 43, '24 EQS 580
Everyone here has different opinion on fuel brand and grade. Stick with the recommended fuel rating and if you can find a gas station that offers no ethanol additive on it use that one. Here in Canada, specially in the Vancouver area, only Shell offers 91 grade without ethanol so I use that one.
Junior Member
Joined: Jun 2012
Posts: 71
Likes: 0
From: Napa County
1975 450SLC 2012 GLK350
I used Costco gas for the first month of ownership with my GLK, my car stalled, since then I've used Shell V-Power exclusively and have had no issues for the last 11 months! Just saying 
Member
Joined: Nov 2005
Posts: 213
Likes: 1
From: New England
2000 E 320S4 210.282 4Matic Estate
Super Member
Joined: Jan 2012
Posts: 590
Likes: 2
From: Washington
10 E63, Sold -07 E63
Costco has pretty decent gas. Most of the "GAS" itself is the same, but it's the additives that each company mixes in the makes the difference. With my experience Shell has been the best.
Senior Member
Joined: Apr 2013
Posts: 445
Likes: 8
From: Tucson AZ
2010 Mercedes GLK 350, 2001 BMW Z3 3.0 Roadster, 1997 Cherokee XJ
As mentioned, the additive package is what makes the difference in any grade of gasoline. When on the road, I utilise Chevron (for its Techron) or Shell. Around home I buy my gas at Safeway but twice a year I run a large bottle of the Chevron Techron (not Progard) through the system. Never have had any problems with the fuel system on various cars. Do remember to replace the fuel filter! So many people fail to do that bit of maintenance.
