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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sun, Sep-10-2017, 06:19:50 AM   #1
werfer
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Default Shell 93 Octane "V-Power" vs Ethanol Free 91 Octane

I've always used Shell 93 octane "V-Power" in all my BMWs, my Porsche, and my Mercedes. In my experience, it's the go-to fuel. However, recently a Ricker's opened up 5 blocks from my house. I stopped by there the other day and noticed that in addition to 93 octane fuel they also had ethanol free 91 octane fuel with Lucas Oil fuel treatment. I've always heard that ethanol is bad and to avoid it if you can. So my question is what do you guys think? Shell V-Power 93 octane or ethanol free 91 octane with Lucas Oil fuel treatment?
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Old Sun, Sep-10-2017, 02:48:35 PM   #2
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Default Re: Shell 93 Octane "V-Power" vs Ethanol Free 91 Octane

Hmmm that 91 ethanol free with Lucas sounds tasty.
We only have 87 ethanol free at "Wawa"

I'll stuff that in a generator but I'll keep 93 shell in the tank.
91 ethanol free though...
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Old Sun, Sep-10-2017, 05:42:06 PM   #3
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Default Re: Shell 93 Octane "V-Power" vs Ethanol Free 91 Octane

I use 89 Ethanol free gas. Maybe a little low for s54.
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Old Sun, Sep-10-2017, 05:59:34 PM   #4
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Default Re: Shell 93 Octane "V-Power" vs Ethanol Free 91 Octane

Ethanol free better for long term. 93 better for short term, small gains I would assume.

I would do 91 ethanol free since I'm a long term owner. Of course, I'm in CA, so ethanol free 91 sounds pretty tasty to me.
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Old Sun, Sep-10-2017, 06:16:56 PM   #5
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Default Re: Shell 93 Octane "V-Power" vs Ethanol Free 91 Octane

I plan on keeping the car forever so I suppose ethanol free it is
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Old Sun, Sep-10-2017, 07:53:28 PM   #6
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Default Re: Shell 93 Octane "V-Power" vs Ethanol Free 91 Octane

For a few years I had access to shell v power ethanol free, and the car just screamed on it. Now, I'm in the midwest corn belt and everything has this crap in it--and the car is noticeably less responsive.

So my choice would be the 91 100% gas. The ethanol movement is a big scam government giveaway to the farmers. I wouldn't participate if given the choice.
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Old Sun, Sep-10-2017, 11:03:42 PM   #7
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Default Re: Shell 93 Octane "V-Power" vs Ethanol Free 91 Octane

Actually I lied. The local Wawas over here are 89 ethanol free. I can find 90 ethanol free by driving around. I wonder if I should try that with some octane booster? Gah I know nothing about fuels
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Old Mon, Sep-11-2017, 06:00:54 AM   #8
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Default Re: Shell 93 Octane "V-Power" vs Ethanol Free 91 Octane

Ethanol is just more corrosive. That's why flex-fuel cars and people with custom turbo kits that want to run E85 have fuel pumps with no rubber parts and no rubber fuel lines (instead use SS or teflon).

You're absolutely not going to get better performance from a lower octane ethanol free gas so whoever said that, unfortunately is experiencing placebo effect.

Again, look at E85. More ethanol yields a higher octane, which means the fuel will burn more slowly and cooler, contributing to HIGHER performance with tuning (that's why you can run higher boost on E85, etc).

The only benefit to ethanol free fuel is less corrosion and better gas mileage since ethanol free fuel is pure gasoline (as oppose to containing 10% ethanol or E10) so it has a higher energy content; gasoline has a higher energy content than ethanol.

93 v-power > ethanol free 89/90/91. If you're in CA and can get ethanol free 91, then you might as well get it. Otherwise higher octane please.

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Old Mon, Sep-11-2017, 01:22:51 PM   #9
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Default Re: Shell 93 Octane "V-Power" vs Ethanol Free 91 Octane

I always ran 93 in my BMW's and my father ran it in his Porsche's then the local Sunoco got 91 Non-Enthanol and it's a good $0.30 higher than 93 octane but lord knows it makes a huge difference. All of our cars felt smoother and seem to run better since we switched to non-ethanol. For what it's worth we had a weed whacker burn out from using ethanol gas so we switched all of our lawn equipment to non-ethanol and knock on wood they all run like tops. Spend the extra money on non-ethanol, you'll be glad you did.
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Old Mon, Sep-11-2017, 03:56:48 PM   #10
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Default Re: Shell 93 Octane "V-Power" vs Ethanol Free 91 Octane

Most engines and cars have been e10 compatible for over 10 years now (BMW since 1986) - the main downside is that ethanol will absorb water over time and that'll allow parts to corrode.. so don't leave it in the car for months and months at a time if you don't have to.

I had a carb jet corrode after it sat with fuel that was itself ~6 months old.. cleaned the jet, good as new.

Aside from that, ethanol is pretty awesome - 105 octane, cool burning, cheap stuff

This article has a lot of information on ethanol/ e85 from Injector Dynamics:
http://injectordynamics.com/articles/e85/

You also don't need non-rubber lines for e85; you simply need modern SAE J30R9 or similar hoses (still rubber, just a synthetic compound)
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Discussing Shell 93 Octane "V-Power" vs Ethanol Free 91 Octane in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)