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Old 05-29-2005, 07:37   #1 (permalink)
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Which premium unleaded is best for 289?

Ive been advised to run my XR's 289 on premium (when its not on lp gas), but i heard that some premiums are better than others for certain engines.

So which is better? I filled up with shell optimax tonight but i seem to remember someone telling me that mobil 8000 is better for carby engines...is this right?
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Old 05-29-2005, 17:39   #2 (permalink)
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Re: Which premium unleaded is best for 289?

The cheapest one would be best :o)
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Old 05-30-2005, 03:19   #3 (permalink)
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Re: Which premium unleaded is best for 289?

You can't go past BP ultimate, octane rating of 98 while most of the premium stuff is about 95 -96.
This is the only fuel I run in my little Windsors.
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