Initially the wrong color was received but after contacting the company the right color was promptly sent to me and the color was an exact match. Also, the price was great! Ronald A, owner of a 2017 GMC Terrain from Orlando, FL 2014 GMC Terrain SLT AWD - Iridium Metallic Color / Jet Black Interior 2014 Terrain Colors. Prepared chipped areas and applied paint. 2014 Iridium Metallic GMC Terrain SLT AWD 91776870 Photo 26. Touch up paint and clear coat arrived on time. Jerry J, owner of a 2017 GMC Terrain from Pana, IL But in my experience it matches every time. Remember if you have a custom metallic color the price will be more than you’d expect. So my first and only place to purchase touch up paint is here. Nowadays with the fancy colors with metallics you can’t buy them in the store. Every color I’ve purchased has matched perfectly. I’ve purchased a few different touch up paints from automotive touch up. If you are like me and don't want your plugs in there for a long time ( I change mine at +- 60K miles) the advantage is pretty much negated.Here's what our customers are saying about our Touch Up Paint: Paul K, owner of a 2017 GMC Terrain from Flushing, MI So as you can see there are some advantages to using this type plug but generally it's up to the owner. Finally, any vehicle that has an extend plug change interval (say 100K miles, or more). A good example is the Equinox 3.0 where the intake manifold has to be removed for access to the plug. Additionally, any vehicles that have difficult plugs to change are also a great candidate for these plugs. These engines fire each plug on the off stroke in addition to the compression stroke so they get double the electrical wear. So what vehicles should have iridium plugs?Īny waste spark engine (think Dodge V-10) that has one coil servicing two plugs should have this plug. It should be noted that conductive resistance inside the plug is not a significant player in strong spark generation since you are already dealing with resistor plug wires (to cut down on radio noise and electrical interference of other sensitive under-hood systems). Additionally, since the iridium resists electrical wear the plug voltage can be somewhat increased for a greater spark potential, but shorting through the plug wire insulation limits the amount of voltage that can be applied. By comparison, a copper plug with a squared off electrode wastes some energy because the spark can't decide where to jump from and relies on a coronal discharge to generate the spark which is "wasteful". A small electrode will concentrate the electrons to that spot and enable the spark to more easily be generated. Since the center electrode resists spark erosion so well, the diameter of the tip can be reduced to a fine point. The longevity of iridium is one of the things that allows auto manufacturers to stretch plug changes to 100K miles, or more. The biggest advantage to using iridium in a spark plug is it's ability to not wear while operating in the harsh environment of a cylinder. Remember, iridium is a rare metal and today's price is $650 per troy ounce, (for comparison, platinum today was $933 per oz.) so they use as little as possible. Other than that, the construction of the plug is pretty generic. The manufacturer laser welds a tiny iridium wire onto the end of the center electrode. The iridium in the plug is limited to the cathode tip. They also can crow that they are because they producing low maintenance engines that those engines are of a higher quality.įirst, you should know a little about an iridium plug. The main one, in my opinion, is that the use of iridium plugs (along with other innovations) gives manufacturers "bragging rights" about reduced maintenance costs. Iridium has some properties that enhance the overall performance of the engine.