vs
Spark plug Autolite or OEM Volkswagen
Reviews
I've put about 100 miles on them and the car seems just as happy as ever. Went for a spirited drive today out in the hills and the car felt responsive and strong through the power range.
Pros: car felt responsive, strong power
Vehicle:
Subaru
Mileage: 160 km
Autolite a103 gapped to .055" will give you about a 5hp increase and last around 30,000 miles
Pros: 5hp increase, long lasting
Mileage: 30000 km
Part number: A103
I did replace the spark plugs at 70k miles
Vehicle:
Volkswagen Golf
Mileage: 110000 km
I found that it had Autolite Iridum spark plugs. They didn’t look bad and were gapped appropriately but I replaced them anyway with the recommended NGK spark plugs. Car has ran perfectly since then with no misfires or stuttering.
Pros: car ran perfectly
Cons: misfires and stuttering
Vehicle:
Saab
These are Autolite plugs, not Motorcraft. Which means the plugs in this vehicle have been changed before, that probably has a little to do with why it was easier than usual to get these out. By the looks of the plugs and the lack of carbon buildup and corrosion (the two factors that cause these plugs to size the most) I'd say they weren't in there for a very long time either. Going by my experience with Autolite plugs in Fords (very little experience as I work on Euros mostly) if they don't start misfiring right away it's usually within a couple of months.
Pros: lack of carbon buildup
Cons: misfiring within months
With almost every car, using OEM plugs is the way to go. The one brand to ALWAYS avoid is Autolite. They are extremely poor quality and I have never seen them work long enough to justify the cost saving.
Pros: OEM plugs are best
Cons: poor quality, short life
Autolite plugs are bad.
Cons: bad quality
Part number: FR7HE02
Do yourself a favor and throw Autolite plugs in the garbage.
Cons: bad quality
Definitely do NOT recommend Autolite spark plugs.
Cons: do NOT recommend
Don't use autolights. AC Delco for GMs & Motorcraft for Fords. Modern ignition systems are sensitive to plugs so I use whatever the OEM does (within reason)
Pros: AC Delco for GMs
Cons: Don't use autolights
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