My friend changed the plugs in his libby and his mpg went from 15.5 down to 13.5. I asked him what the gap was and he said the parts guy at PepBoys said they were pre-gapped already to the correct specification when manufactured. He claims it runs much better after the change especially on a...
bought my used 04 libby that had the original goodyear wrangler sra's that still have 4/32 left on them @ 40k miles but i don't want to go into winter with them.
my libby 4x4 is stock, no mods lifts etc. tire size is p235 70r16
i'm looking for something with an agressive tread pattern that...
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