[clayfoushee]

ST,

Interesting site on plug reading, but it says that the tests are only valid under certain conditions:

"This is only valid if you shut-off the engine after the finish line then tow the car back to the pits where you remove the plugs for reading !!
Or if you are on the dyno
VALID ONLY for full load acceleration or steady state dyno tests"

Also, I've always been told that you can't really read plugs running today's unleaded fuel like we used to on leaded fuel. True or not?