Spark Plugs at 55K - Toyota 90919-A1008, DILZKAR8E7H

[Kiet2k]

The reason I asked….I was wondering if using Top Tier gas keeps the spark plugs cleaner longer than using non Top Tier gas. Everyone claims the fuel injectors benefit from Top Tier fuel.

I would put a bottle of Liqui Moly Direct Injection Fuel cleaner in my wife's Audi every 10K miles. I've tried this in the LC250 a couple times and it seems to do a good job of increasing MPGs. I'm sure it helped clean the plugs off as well.