Does Everyone put 91+ octane in your E Class?
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From: MA
2008 E350 4Matic, 2011 E350 4matic
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From: Tremonton, Utah
2014 E350 Sport 4Matic Sedan
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From: 122W, 37N
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I live essentially at sea level. 91 is the highest any normal gas station has. I've been up above 8000 feet where they didn't even have 91, they were selling 89 as 'premium'.
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
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From: 122W, 37N
2016 E350 4Matic wagon, 2019 Ford Expedition, 2019 Chevy Bolt EV
Having had enough issues with cooling and crankcase blow-by under sustained boost, meh, I am done with turbos for awhile. we picked the 2016 e350 because it was the /last/ non turbo 6 cyl E series.
Last edited by Left Coast Geek; May 15, 2021 at 04:51 AM.
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The whole idea of forced induction requiring premium is outdated. Many modern, inexpensive cars are using forced induction engines tuned for 87 - we own one. A 1.6 turbo with 201hp that is tuned specifically for 87, it sees no benefit whatsoever from anything higher. Mazda's NA four-cylinders use very high compression and ask for 87. Mazda's turbo 2.5s will run on either with 227hp on 87 and 250 on 91-93.
Now perhaps if we're talking German performance or whatever, sure. But just because a turbo exists does not automatically mean it has to have premium.
Now perhaps if we're talking German performance or whatever, sure. But just because a turbo exists does not automatically mean it has to have premium.
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'17 S550, '12 E550
And with a Stage 2 flash,.. it's supposedly at about 550 / 650,... so I put anything less than 93 in it.
I remember when I lived out west,.. the governor decided to increase emissions by limititing octane to 91. So anyone with a fast car had to mix in a bit of race gas. Really did a number on my Ducati. Couldn't get full throttle without audible knock, without splash of race gas or octane booster.
What a bunch of idiots. Their gov at the time was a massive moron. Thought it was a great idea to bankrupt the state by buying everyone SUV's,.. just so long as they installed a propane conversion that they never used.
Anyway,... East of Arizona and Cali,.. we still have real gas.
There is a push to make 98 or so octane standard nation-wide. Would allow car manufacturers to make higher compression and more efficient engines. Octane is one of the things holding back the progress of ICE.
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