Scotty's Live Answer to: Factory Installed 3 Denso & 3 NGK Spark Plugs?

Question

2008 Toyota FJ Cruiser. V6, Automatic. Bought new by me. Only 48,000 original miles.

Scotty (& Guys):

Scotty, thanks so much for your answer to my question on your live stream last week. I really appreciate your efforts for me and the other viewers. Not enough space is/was in live chat to tell you that my 2008 FJ Cruiser had only one "professional" service done on it since I bought it new. A complete coolant flush, by machine, 4 years ago at my friend's shop. I do everything myself as far as maintenance & repair on all 7 of my vehicles. Your videos over the last dozen-plus years have been a great help to me.

Looking on the FJ Cruiser Forum (("different spark plugs". I'm not sure if I'm allowed to post the link)), a few owners cited the same odd spark plug issue that I had. Two different plug types (3 Denso & 3 NGK) from the factory. This makes no sense to anyone, yet somehow has occurred more than just to me. What a mystery.

THANKS!

This topic was modified 1 year ago by SAL R

FJCruiser2014 · Accepted Answer

Take a look at this link from that same forum; obviously you're not alone regarding this and some say it's because "The general consensus is that each head comes from a different supplier and the heads are supplied to Toyota with the plugs installed. The two suppliers happen to use different spark plug mfrs. (Denso & NGK)"

https://www.fjcruiserforums.com/threads/different-spark-plug-brands.83783/page-3

FJCruiser2014 · Answer

Posted by: @mmj any experience with this, @fjcruiser2014 ? I've never had to change mine yet to actually take a look at it, but I also hadn't heard of this until. Maybe it's only with a certain model year that this has happened with or maybe only a particular batch of the cars. But now it definitely makes me curious to take a look at mine too!

nlord · Answer

They did it with 3rd gen 4runners too, 3 denso, 3 ngk. What a fun mystery, but at least they used two good brands for the spark plugs.