Watch this for final word on which fuel to use (Hint: Premium fuel matters)

[qberg]

Slightly off-topic, but the S85 v10 engine in the E60M5 is a mighty nice engine.

On-topic, the gas debate can go on and on, which tells me one thing, really nobody knows other than the engineers and petrochemical engineers.

That V10 is insane. Sounds soooo good. I might have driven one at super extra legal speeds on an empty interstate one time. Maybe. The SMG is actually a pretty great fit with it assuming you never go under 20mph.

 

[Obioban]

That V10 is insane. Sounds soooo good. I might have driven one at super extra legal speeds on an empty interstate one time. Maybe. The SMG is actually a pretty great fit with it assuming you never go under 20mph.

I manual swapped mine

 

[Justaron123]

I’ve been running e-15 (88) and 93. I’ve notice no change in mpg, motor noise, or performance.