[tm811]

Been using Chevron 94 (no ethanol) for the last 1.5y in my x3m comp but now moved into a new G82.

I've seen over time that my fuel economy has improved vs using petro or costco 91. This makes sense since the fuel system has the capacity to compensate for the reduction in energy content by injecting more fuel... therefore why fuel economy decreases when using ethanol blended fuel.

There's been quite a range of answers in thread archives. The best fuel you can run from what I've seen on logs is Petro Ultra 94 but this has ethanol so I am confused.

Curious to see what other Canadian G80.G82 users running.

[gc.g80brg]

I've always used 91 octane on any of my M cars (E46 m3, e92 m3, f87 m2c, g80 m3c), since it is what bmw engineers recommand.

I didn't really check the fuel economy to be honest since those are or were performance cars (for their generation).

[RUNSOK]

Shell 93 only..

[Nembus]

Petro 94, also ethanol is really needed for those higher octane levels. Not sure exactly why on the reasoning, maybe it's cheaper to hit the higher octane with ethanol and overall ethanol is cheaper than gas. It's not bad for your system either if you drive regularly as well, you only put ethanol free gas if you plan on storing the car for long periods of time afaik.

[YasPlz_CSL]

94 Petro only

[Seanhfx]

Shell 91 only

As for fuel milage, 6.6L/100 kms in 7,500 kms.

[forcefed]

Originally Posted by Seanhfx

Shell 91 only

As for fuel milage, 6.6L/100 kms in 7,500 kms.

Don't believe it, post your monthly report...

[T0RM3NT]

Conoco 93 for me. Interesting read(s) here:

https://www.autoblog.com/article/gas...-quality-fuel/

https://www.toptiergas.com/

[Reprosal]

Only 91 octane available in SK with ‘up to 10%’ ethanol.

And yea, calling BS on the 6.6L/100km. I have almost 28,000 km and never have I had mileage like that in any road trip overall. 7.3-7.9 at best

[GrannyShiftG80]

Shell 93 only

[Forzanerazzurri]

Shell 93 or Petro 94

[81bear]

I used to run Petro 94 exclusively but with their winter gas switched to Shell 93. Sent PTF a log of my car on both fuels and they said Shell was running better on my car. Neither was great and I had to switch to Map 1 (ACN91) but the car feels good. Also noticed Shell reads at 11% ethanol vs Petro at 10%. Will test more once the summer gas becomes available.

[Nembus]

Originally Posted by 81bear

I used to run Petro 94 exclusively but with their winter gas switched to Shell 93. Sent PTF a log of my car on both fuels and they said Shell was running better on my car. Neither was great and I had to switch to Map 1 (ACN91) but the car feels good. Also noticed Shell reads at 11% ethanol vs Petro at 10%. Will test more once the summer gas becomes available.

Please do

[tm811]

Originally Posted by 81bear

I used to run Petro 94 exclusively but with their winter gas switched to Shell 93. Sent PTF a log of my car on both fuels and they said Shell was running better on my car. Neither was great and I had to switch to Map 1 (ACN91) but the car feels good. Also noticed Shell reads at 11% ethanol vs Petro at 10%. Will test more once the summer gas becomes available.

That would be awesome to test

[/ / / M3]

Originally Posted by 81bear

I used to run Petro 94 exclusively but with their winter gas switched to Shell 93. Sent PTF a log of my car on both fuels and they said Shell was running better on my car. Neither was great and I had to switch to Map 1 (ACN91) but the car feels good. Also noticed Shell reads at 11% ethanol vs Petro at 10%. Will test more once the summer gas becomes available.

Interesting. I thought Shell 91 and 93 were supposed to be ethanol-free.

[kgelfen360]

Costco 92 that’s most common in my area. Hard to find 93.

[81bear]

Originally Posted by / / / M3

Interesting. I thought Shell 91 and 93 were supposed to be ethanol-free.

I’m pretty sure both have up to 10% ethanol now. Cheaper way to hit octane values. I was surprised to see 11% though. Filled up two weeks apart and both times the reading was 11%.

[ksa]

Esso 94. The gas cap says minimum 91, but I figured if 94 is available that's a better way to go.

[Speedyf16]

I'll add that a friend and I compared Shell 91 and Petro 94 about 6 years ago on our tuned cars (tuned M235i for him, supercharged 3.0L Audi S5 with APR's pulley and tune for me).

Both cars were on 93+ tuning maps. We datalogged both cars in Calgary at about 4500' DA (which my high IAT supercharged S5 hated).

Both cars were consistently pulling timing with Petro 94 and felt low on power.
Shell 91, both cars were very happy on the datalogs and on the butt dyno!

Now that Shell 93 is available here, it's all I've used on my 5.0L supercharged Jags and the last year I had my '17 C63S it was much happier on Shell 93 at the height of summer.

Shell ftw...based on 6 year old data lol