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Old 07-31-2021, 07:17 PM   #5
Ol'school Geek
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Join Date: Mar 2020
Location: Washington State / the Left Coast
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Vehicle: 89' D21 KC SE V6 5spd 2WD - 87' D21 KC SE V6 5spd 2WD
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I'll back up what Deerhurst said... you can run non-eth but it's more pricey and really not necessary. Also, these truck were around at the beginning of ethanol, so they're good with any octane. Even 87.

BTW, nice beater you got there. (o: Gotta luv um when they don't die...
. . . Factory Service Manuals:
Originally Posted by Deerhurst
What he is saying is the aerodynamics of a D21 is a brick in the wind.
Probably at least as bad as a Jeep so worse than a cow.
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