New tundra and tacoma sparkplug interval.

[easym]

Toyota manual says to replace sparkplugs for new tundras with 3.4 turbo and 2.4 turbo tacomas at 40,000 miles. Isn't it too soon for iridium plugs?

 

[6.7 CTD]

For the 3.4, the compression ratio is 10.4:1, I believe. Add in the forced induction (turbo), and that can be a fairly harsh environment even for iridium plugs. Toyota is probably playing it on the safe side with this recommendation; just my guess.

 

[Ausfahrt]

From the Tundra warranty and maintenance manual:

 

[Thermo1223]

EJ255 in Subaru's are every 60k. So it's not totally unbelievable.

 

[trd1zz]

Sheesh Toyota... on my old Corolla the plugs are specced for 120k and it takes 15 minutes on my 1.8L.

Are we going forwards or backwards here with the new vehicles? Either way we all can agree taking these things into high mileage is not going to be cheap as it used to be.

 

[PWMDMD]

It depends if it's after the long/short block replacement or before.

 

[slacktide_bitog]

Replace them with ruthenium

 

[Snagglefoot]

One thing that gets forgotten in the number of miles is the average rpm they were subjected to. My 6.0 in my 3/4 ton cruises long at 1800 rpm and accelerating to pass is over at 4500 rpm. The change interval is 100,000 miles. Higher revs and the cylinder pressure of a turbo causes more wear.