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All the independant tests I've read of Pulstar plugs agree....they are Unicorn pellets.
Actually the independant tests also seem to say no fancy iridium, platinum, etc plug will give you better fuel economy, they're all about extended service life.
The general rule of thumb is, use whatever was OEM. NGK for Japanese cars, Bosch for Euro cars.
Plug indexing may be worthwhile for racing, but I'm pretty sure most of us wouldn't notice the difference driving for FE.
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