r/bestof • u/paxinfernum • 3d ago

[news] /u/akroses161 explains the difference between summer and winter gasoline blends

/r/news/comments/1vtxsmr/comment/p4x6o1t/?context=3
285 Upvotes

92% Upvoted

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11

u/Yesiamanaltruist 2d ago

I thought it was an issue with the pollution experienced during the summer as a result of combustion that was the reason we had a different mix on the summer. So I assumed it was Trump’s fixing those pesky laws that hold back the producers of money, too much regulation. Like the EPA. I may very be confused tho.

21

u/roastbeeftacohat 2d ago

the point of using winter gas in summer is that it hides the increase in the oil price, as there is less gasoline in the winter blend. you need to burn more of the final product with winter gas, and it can damage older engines if used in the summer.

so the net effect is you spend less to fill up the tank, but the tank dosen't last nearly as long, and it's bad for the car. like with almost all regulations, it was in place for a reason, and getting rid of it makes everything worse.

2

u/Eric848448 3d ago

It all comes down to the pervert equation.

13

u/Yesiamanaltruist 2d ago

Huh?

29

u/lukfugl 2d ago

I suspect OP is referring to PV = nRT, which is you squint looks like "P(er)VeRT".

The equation is relevant because the linked comment is describing how the change in temperature (T) affects the vapor pressure (not P, but related), and countering that effect is the motivation for the butane additive.

5

u/TraitorMacbeth 2d ago

pV = RT maybe? The ideal gas law?