Spark plugs, a cheap must do maintenence item

[07liftback]

Originally Posted by bronsin

You could have regapped the plugs those gaps are pretty big.

On my motorcycles which I used mainly for long distance riding the plugs last 100,000k miles and they were regular plugs.

Consensus on this forum pretty much is transmission and coolant system flushes aren't necessary.

The fuel filter isn't considered a regular maintenance item by Toyota and my experience (20 years) with EFI is the ff only needs changing when a contamination event happens. The ones Ive changed were like new.

You might do the oxygen sensors. The ones on my cars never failed so I don't.
Not trying to start an argument just trying to save you time and $$$$.

Youre right to take the plugs out when the engine and mpg go south. But I would bet regapping the plugs would solve the problem.

How many miles on your car?

I'm at 105k miles currently. Just seems like we ignore most maintenance items on this forum. I mean the plugs cost $13 and took me around ten minutes to change. It looks like the plugs barely have anything left, I mean regapping them probably would've worked too but it still wouldn't spark as well as new plugs. Pretty sure the O2 sensors have also gotten lazy since my mpg has been going south for about a year or so.

Originally Posted by Bluevitz-rs

So you replaced your 100,000mile plugs for 20,000mile plugs?

The OEM plugs are made by NGK so no, they aren't 20k plugs by any means. If I wanted a long lasting plug, I would've went for the nickel plugs by NGK but these copper core plugs create a better spark although they might only last 30k-60k. During that time, they'll probably save more gas and make up for the difference in quicker plug change intervals.