I recommend nothing with platinum. I've had problems with those in my 1980 gbody with a 305. I just keep it simple with old ac/delcos now. Keep it simple for less problems.
Pros: simple, less problems
Cons: problems with platinum
Reviews of AC DELCO spark plug
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These look like knockoff acdelco plugs.
Pros: none
Cons: possible knockoff
Use only AC DELCO ignition components for GM vehicles, and that includes spark plugs. The factory plugs work perfectly.
Pros: work perfectly
Cons: more expensive options
AC Delco CR43TS.
Copper plugs are actually the best for performance, precious metals just last far longer.
Pros: best for performance
Cons: shorter lifespan
Part number: CR43TS
I'd use the original equipment AC Delco plug. Rockauto has them for $6.31 each, with a $3 per plug rebate offered.
Pros: original equipment
Vehicle:
Chevrolet Cruze
Part number: 41-121
At least with double iridium ACDELCO on the c5. It’s 100k intervals.
Pros: 100k intervals
Cons: PITA to do them
Vehicle:
Chevrolet Corvette C5
Mileage: 100000 km
AC Delco double platinum spark plugs belong in that engine.
The new plug is AC Delco 41-156. Cannot tell any difference in my Gen 2 after replacing plugs. It ran fine before and did afterwards as well.
Pros: ran fine before and after
Cons: no noticeable difference
Vehicle:
Chevrolet Cruze
Part number: 41-156
I use them. Just replaced a set after they'd lasted 90,000 miles, only to rule out a very very tiny misfire count issue I've noticed lately. I might get a coil pack now, but those original plugs surely would have lasted longer (they say they should last for 100k).
Pros: lasted 90,000 miles
Cons: tiny misfire count issue
Mileage: 144840 km
Bought a set of iridium plugs that were wasted after 15k miles. Amazon gave zero fucks. AC Delco gave zero fucks. The scum bags who sold them changed their name and keep selling.
Cons: wasted after 15k miles
Mileage: 15000 km
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