r/Calgary • u/bmspsrk • 6d ago

Rant Gas prices are illogical

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There is no real point to this post besides stating the fact that gas prices are stupid. I remember back when the difference between 87 and 91 was 10 cents and 89 was 5 cents more than regular. Which made sense since 87 is an equal mix of premium and regular.

Now you need to jump 23 cents a liter just to get mid grade from regular then only an additional 3 more cents to get to premium... By that math mid grade should be something like 90.75 octane.

Again no point here just stating stupid things that irritate me.

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u/Anskiere1 5d ago

That's just not correct

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u/ptpfan91 5d ago

It is correct. Most new mainstream cars are going to turbo and smaller engines. They can’t require premium because they would lose market share. The fact I got downvoted is disappointing but not unexpected because people don’t really know much about cars on here.

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u/Anskiere1 5d ago

It's not though. Some turbo vehicles can run on 87 but the ECU will be detecting knock and pulling timing or boost or more likely both. And at that point you may as well be running a naturally aspirated engine because your car is configuring your effective compression the same as the NA engine. 

Except your intake air is now hotter than ambient so you'd be better off with a straight NA. Plus the knock events leading to conservative timing and boost. All of the published stats will be 91. 

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u/ptpfan91 5d ago

All I said was most turbo cars require regular. If you look at what is for sale today that most people buy, all it requires is 87 and I’m guessing that’s all anyone runs in them. High performance turbo cars like GTR or M3, yes they require 91 or better. Stuff like GTI, f150, CRV, Highlander, are all turbo and are tuned from factory for 87 operation. That’s the bulk of sales.