what are the best spark plugs and wries for a 95 boneville - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-22-2005, 12:47 AM   #11
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How does the one heat range colder impact the engine and performance? I have always wondered this.

For a non modded engine is going 1 heat range colder make a difference? advantages/disadvantages?
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Old 01-22-2005, 01:44 AM   #12
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We have a Techinfo article on this subject

On a non-modded engine, there will be no harm. The plugs MIGHT foul out sooner, but probably not by much. The NGK V-Powers aren't made in the stock heatrange for our cars, so most (especially those boosted) go with the 55'*.
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