Premium vs. Mid-grade
11-27-2004, 07:21 AM
#1
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Premium vs. Mid-grade
Since I have owned this A6 I have been burning premium. Yesterday I gave some Chevron 89 octane a try before our roadtrip of 300 miles and noticed no drivability problems whatsoever. Does anyone else burn mid-grade or is this a bad fuel for these cars?
11-27-2004, 10:40 AM
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I run what is recomended. Last couple tanks I've ran
Shell's V Power, 91 octane. It's too soon to tell but it seems I am getting an increase of 1-2 mpg.
You may be able to run the mid-grade a few times with out incedent. It may be in the long run that you start to see fuel system issues.
You may be able to run the mid-grade a few times with out incedent. It may be in the long run that you start to see fuel system issues.
11-27-2004, 04:02 PM
#3
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Should always use the minimum octane specified for your car. A lower octane can cause knocking...
(even with the knock sensors trying to retard timing) that eventually cause damage to the pistons/rings. As dr.greenthumb says, a couple of tanks won't hurt, but using lower-than-spec octane in the long run could cause you big problems => big $$s.
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