Top Tier gas - has this been done before?

[ice445]

I filled up with Costco 91 instead of my usual Chevron 91 and I can already see a bit of difference in the logs when it comes to timing advance/knock retard. Nothing crazy though.

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[K4fxd]

Nothing crazy though.

Better or worse?

 

[ice445]

Better or worse?

Worse, by 1 or 2 degrees on average. Its hard to exactly quantify because every drive is different, but that's what I'd wager.

 

[K4fxd]

The Chevron might actually be 93.

 

[ice445]

The Chevron might actually be 93.

I wish, then maybe the FP tune would work without pinging in the heat lol

 

[robvas]

Just came across this post...

https://www.mustang6g.com/forums/th...gt350-gen-2-voodoo-engine.190461/post-3866264

 

[K4fxd]

Just came across this post...

Except Costco and shell gas come from the same distribution tank.

 

[robvas]

Except Costco and shell gas come from the same distribution tank.

Additives are different, maintenance on the tanks is different, probably 50 other things.

I don't buy the 'all gas is the same' schpiel. I realize it all comes from the same handful of distributors/refineries but I don't think it's that cut and dry.

Like Kroger tomato sauce comes from the same place as Ragu or Prego or whatever, they just put a different label on it...

 

[K4fxd]

Round these parts Shell is almost 5 per gallon and costco is 3.80 to 4.20. Costco gets 3 or 4 tankers of gas a day. Shell gets one a week. I log less timing with Shell than Costco.

If you talk with a tanker driver he will tell you it's all the same gas.

I'll take the cheaper fresher gas. When I'm racing I buy VP in a can.

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