The three in the back are a bear to get to. Go to RockAuto.com and buy premium plugs so you don't have to replace them ever again. I usually buy Iridium or double platinum. Here's a video showing how to: https://www.youtube.com/watch?v=W_uNy13f7Cw
Others may suggest pricey low maintenance brands, but I suggest Champion or NGK standard grade, that way you can check the running condition at 20,000 miles rather than keepin' the faith for 100,000-
I've always used Bosch in my Opels and I have NGK's in my Pontiac. All the name brand plugs are about the same as long as you don't go for the cheapest ones.
Might have to have a little better than a "home owners" tool box before you attemt the job. Nothing personal but if you don't know where the plugs are or lack the ability to locate them on the engine, get help to do the project.
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