What Does R Mean In NGK Spark Plugs?

What is the difference between NGK and NGK R spark plugs?

Not sure if this has been answered but the only difference between the NGK and NGK-R is the R stand for resistor.

It will supress electrical interference with electronics..

What do NGK Spark Plug numbers mean?

Typically the heat range for NGK Spark Plugs varies from 2-11. This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. … This means the spark plug will heat up easily and reach its optimal operating temperature.

Why are NGK Spark Plugs better?

The NGK 6619 Iridium IX Spark Plugs snags the top pick in our spark plug comparison because they offer the best mix of high-performance, fuel efficiency, durability, and dependability. Featuring an iridium construction, these high-quality spark plugs provide a longer lifespan than copper and platinum spark plugs.

What does R mean on a spark plug?

[R] Resistor – If an R is present, this indicates a resistor type spark plug. Resistor type spark plugs reduce the amount of radio frequency interference (RFI) that can cause ignition misfires and static on the radio. [V] Shell Design – This refers to the thread size and reach of the spark plug.

Which is better a resistor or non resistor spark plug?

Since resistor type plugs actually “resist” some of the spark energy, non-resistor type plugs actually deliver a more powerful spark. … Use of non-resistor plugs in vehicles that call for a resistor type can result in rough idling, high-rpm misfire, and abnormal combustion.

How much resistance should a spark plug have?

The Society of Automotive Engineers suggests the maximum resistance should be 12,000 ohms-per-foot. However, some OEMs have recommended different maximum resistances. Consult a tune-up manual for exact specifications.