My parents used to say to always fill the tank up when refilling. To keep condensation from forming in the tank.
Where is Mythbusters when you need them?
My parents used to say to always fill the tank up when refilling. To keep condensation from forming in the tank.
Where is Mythbusters when you need them?
It was already stated but I don't think low octane would lead to lower power unless you have one of those fancy newer cars that has an octane sensor and pulls timing when the octane is low. Are you driving long enough to get everything hot? Cold motors make a little less power- cold oil, slightly lower compression, etc.
In reply to ShinnyGroove (Forum Supporter) :
Knock sensors have been used on EFI vehicles since the 80s. Low octane makes knock, pulls timing, reduced power
True enough, but the OP said he has an aftermarket tune, so unless the tune pulls timing with a knock sensor, probably not the issue.
The tune doesn't affect the knock sensors unless he went to great lengths to hack something that is nearly unhackable. At least I've never seen a tune that changes KS processing. It's a great asset so no one really changes it.
It's possible, but defeating or changing the KS is just not really something that anyone changes. No harm, big benefit. I assumed his tune was a typical fuel/spark map change since altering something outside the parameters of the software is not really easy. Kinda like editing an Excel spreadsheet by physically changing the 1s and 0s on the hard drive, except harder because it's hexadecimal.
Not an aftermarket tune, just stock ECU swap that has much better timing/fueling. I'll be getting gas from different station next time and topping it off.
Could be bad batch of gas, car is still running better then it was.
Is it a busy gas station?
Not many people buy premium and at a small mom-and-pop station, the fuel can go stale.
I got a nice tank of water from a small gas station once because of this. Now I only buy premium at busy stations.
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