Thread: Premium Gas???
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Old 09-08-2011, 08:05 PM   #13 (permalink)
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Originally Posted by Rick Rae View Post
I suspect the vehicle (and driver, and environment) of interest would need to be tested. There are probably way too many variables to make a useful blanket statement.

Before the Versa I had a Cabrio; its 2L was the only VW engine rated for regular gas. Back in 2007-2008 I ran a test on Shell Regular, Plus, and "V-Power." It was real-world, not tightly controlled, and not blinded, so it hardly qualified as an "experiment." But I ran the test for a LONG time to try to get reasonable data.

In my specific car (with me driving, etc.) I saw a slight FE improvement with premium, but not enough to offset the additional cost.

The data is available if you're curious, but it's on another forum and I don't know if I'm allowed to mention it here. Hardly worth looking at anyway; the improvement in my case was very subtle.

you left uot the most important fact: what was the recommended fuel.

That's really the issue.
And it can't be 'retrained' by pulling the ecu.
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