Use the Toyota OEM iridium tip plugs. They are amazing!
I’ve been running champion plugs for about 40k mi without issue.
Toyota Corolla (2017) gets 30/36 mpg and cost $13K with 80K miles on it. Insurance $100/month for maximum coverage. I have had it since 2019 and have never had any maintenance except spark plugs (once), battery (once) and tires (once), and oil changes. So I have spent maybe $1000 on maintenance in 6 years.
My feels like it’s running brand new with 100k plus miles ????
I used champion spark plugs.. no problems here
I bought six OEM spark plugs at the Toyota dealership parts counter and it was $12!
I do need to change the spark plugs. I haven't done that in 10+ years and 100,000+ miles. It just started misfiring slightly I believe (haven't checked the code yet), but it runs and drives well still.
Champion spark plugs are rubbish, not sure why they’re even sold.
I quit buying Champions 40 years ago for shitty quality.
Champion is garbage.
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