Should I use premium gas in my 2005 bonneville

Asked by GuruXYT51 Oct 08, 2018 at 10:51 AM about the 2005 Pontiac Bonneville SLE

Question type: Maintenance & Repair

1 Answer

26,245

Premium fuel is not "better" in any way. It only alters the temp/pressure that it will detonate in your engine. It is meant for engines that require this elevated condition and yours is not. You get the same cleaning action from regular octane fuel.

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