Resistor versus Non Resistor Plugs-96 SL500
 

I read somewhere in the forum that we should not use a Resistor type plug in my SL500-5.0 V8.

I am confused by the following description on the NGK web site.

Can someone clear this up for me?

"NGK strongly recommends using resistor spark plugs in any vehicle that uses on-board computer systems to monitor or control engine performance. This is because resistor spark plugs reduce electromagnetic interference with on-board electronics.

They are also recommended on any vehicle that has other on-board electronic systems such as engine-management computers, two-way radios, GPS systems, depth finders or whenever recommended by the manufacturer.

In fact, using a non-resistor plug in certain applications can actually cause the engine to suffer undesirable side effects such as an erratic idle, high-rpm misfire, engine run-on, power drop off at certain rpm levels and abnormal combustion."

Thanks

For the last 30-40 years MB has suggested against using "normal" resistor plugs..but now that Bosch has re-designed their complete line of spark plugs using "Yttrium" to add life to their plugs they are now suggesting use of THAT style resistor plug...

Thanks M.B. Doc, if what you and NGK is saying is true-and you owned my 96 SL500, what plug from Bosch would you recommend then.

Thanks