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Stick with OEM.
If it's a turbo engine, OEM are Platinum and if not turbo, the OEM 4 prong plugs not only do their job well but they're in-expensive and last at least 30K w/o problems.
No different aftermarket plugs will help with performance or mileage despite what their ads claim, they're just spark plugs.
I've seen more often than not where cars with aftermarket plugs have more plug related problems than those with OEM plugs, especially in winter when you really want your car to start and run right. Problems like hard starting, flooding, misfiring. To me, it's just not worth experimenting with and all my cars always use OEM plugs and start/run fine at 25F below 0.
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