I've never had a problem with the OEM plugs. Most any of the major brands
should be good though.
My last three GM cars had Delco plugs and I kept them far longer than the
suggested change with no problem. New plugs gave no additional benefits as
the old ones were still working well.
Replace the wires while you are at it though. They deteriorate with age and
can get broken when removed from the plugs..
I think the plugs and wires were replaced as a set. When I got the car it
the Bosch plugs as well as Bosch wires, so the wires are probably fine.
And the only reason I'm going after the plugs is I have a very occasional
Only happens when I'm cruising on the highway and it's level but either goes
a VERY slight grade or I VERY lightly accelerate. Not always. Thing is,
getting combined mileage of 27mpg, so I can't really complain too much about
it. That's at 65mph highway with the air on.
My 93 Intrepid had a miss, and I went through everthing.Brought the mileage
to 19 or so, then finally changed the wires. 160K miles. The difference
amazing, and the mileage went to just over 25mpg. There were no error
My 95 Pontiac has the kludge between OBDI and OBDII. Right now the only
error codes I get are EGR...
But I wonder... Maybe the Bosch wires were an attempt to solve something
While not exactly new, they do look in VERY good condition.
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