Spark Plugs ????
 

I was just doing the time consuming process of changing the spark plugs on my 89 c4.

I noticed that the brands were different.
Would this, or could this do harm to the engine?

BTW, the plugs were single platinum EKG and triple platinum Bosch.

Thanks in advance.

I doubt the engine is smart enough to know the difference without the advanced electronics of todays modern cars.

I'm not even certain there is a trouble code for miss matched plug brands...

coool.
I didnt think it would, but I just wanted to get another opinion

As long as the heat range, reach, etc. of the plug is the same ..not a problem.

if one plug produce more fire than the other, your car will pulsate. Or maybe one side go faster than other other
:lol: j/k