DIY 91 octane at Chevron saves $

[Vale46Rossi]

[murd0c]

Originally Posted by b0unce. [?]

Fill up early in the morning or when it's still cold. The colder the ground the more dense the gasoline is. When it's warmer out, you're not exactly getting a liter for every liter you pump. Pump on slow speed to minimize vapors when pumping.

That's pretty much all the "tips" I know. Not sure how valid any of this is, I generally ignore all this when I fill up lol. I top it off if it's cheap, or fill when I'm at 1/2 tank. I don't bother slowly triggering the nozzle, I full blast so I can gtfo quicker lol

Those tips you know are wrong.. Each dispenser has something called ATC (Automatic Temp Control) which of course makes sure the temp of the fuel is up to weights and measures standards so you get what you pay for. As well the Veeder Root fuel monitoring system in the ground will go off if the temp of the fuel in the ground has changed drastically.

That being said Chevron is the only gas station that doesn't use ATC and there is no difference at all as long as the dispensers are calibrated every year which they are.

[underscore]

If they weren't raping us so badly for gas I would say the slight premium on 91 (vs mixing) would be fine to cover the bit of extra wear and tear on the pumps toggling more to mix the gas.

But they're assholes so fuck'em

Originally Posted by HKS PWR

You did not account for the ethanol in the 87 octane gasoline, which is blended with ethanol (has a lower calorific value/energy content). Overall, you've blended gas that is "lower quality" than straight 94 octane gas.

Mixing is how the pump gives you 89 and 91 anyways, that's why it says "may contain up to 10%". If the 87 is 10% and the 94 has none, the 89 and 91 will be less than 10% ethanol.

[murd0c]

If anyone has any questions ask me I can answer anything you have...

[ancient_510]

Originally Posted by murd0c

If anyone has any questions ask me I can answer anything you have...

Where is MH370?