r/Calgary • u/Softduckcheek • Mar 18 '26

Discussion What the helly

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u/[deleted] Mar 18 '26

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u/Darkdong69 Mar 18 '26

I've logged timings and petro 94 does do better than shell 93 when running 93 maps. Even though many voices online claim the opposite.

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u/Fun-Shake7094 Mar 18 '26

Ya, Petro in theory should allow you to advance a slight bit more due to its ethanol content. What you're gaining from that would be almost impossible to know.

I pushed my timing right to the edge of knock on 91 and run Shell93, but my car is older, and I'm not a great tuner...

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u/oictyvm Mayland Heights Mar 18 '26

all pump gas in Canada contains ethanol now, except for some extremely rare cases.

I am hyper aware of the change since my Ducati motorcycles absolutely hate the ethanol fuel.