Well, I have an update worth reporting back for. PSA #2 for Elantra owners incoming:
I have been running E-0 87 for about three months now thanks to one gas station offering it for an extremely reasonable price (typically 5 cents more per gallon than E-10) and not changing the price one single cent in at least the three months I've taken notice. This does mean that sometimes this E-0 has been cheaper than any E-10 around at times. I've been running this fuel in both of my vehicles without issue. I have been noticing my Elantra falling on it's face some when getting on it (I unfortunately frequent a very short highway onramp that makes you go from a stop sign to 70mph in exactly 397 feet). I have also noticed what feels like some gear hunting at lower speeds (10-15 mph) when gently accelerating. I remembered my original post and since I was doing an oil change anyway, I decided I'm done screwing with these abysmal plugs. I triple checked all of the websites regarding my plug choice for this Elantra. Still, NGK doesn't make a plug for the 2017-2018 Elantras. So I decided to call Hyundai and work backwards. I asked what plugs were needed for my car (I supplied the VIN). Then I asked if a 2015 Elantra (1.8L) uses the same plug. He said no. But he did say that the Velosters use the same plug. So I started searching under the Veloster for NGKs. Just like the Elantra, it doesn't exist. I finally got irritated enough and decided I'm rolling the dice no matter what. I'm 100% done with these YURAs. So I start pulling the plugs. Keep in mind these plugs were already changed by the dealer at 28,736 miles. These 'new' plugs were pulled today at 37,685 miles. Here's the picture of the odometer for proof:
So these plugs had a whopping 8,949 miles on them. Remember, they're also iridium. Shocker: they looked like crap...again. Here they are in order by how they were taken out of the engine (passenger side-->driver side):
Unfortunately, the picture didn't do the spark end of the plug justice. They appear respectable in this pic, but in-person they look worse and definitely darker.
So in went my NGK 9723s (SILZKR7B11). They threaded in perfectly and I did measure the length of both plugs from the gasket to the ground electrode (for piston clearance). Identical. Gap is also identical on both at 0.044. Knowing that, I didn't care if there were any other differences. They were replacing the YURAs no matter what. I refuse to believe NGK doesn't make a spark plug for one of the most common cars on the road. I replaced them, finished my oil change, and took it for a spin.
I should have put the NGKs in the first time. It's noticeably more responsive, it doesn't seemingly 'hunt' for which gear it wants when you roll that rural stop sign, and most importantly it doesn't fall on it's face in the higher RPMs. Quite the opposite. This car has never felt this good. Ever. And once again I am reassured there are zero transmission issues. It was all related to the plugs.
I will report back if there are any issues running these NGK 9723s, but based off of my 10 mile test drive to ensure it got fairly hot, they were stellar. So unless I report back stating otherwise, let this be reassurance to anyone else tired of the horrid YURA plugs: the NGK 9723s *DO* work in a 2017-2018 Elantra, even if all the parts stores and NGK tell you otherwise.
I have been running E-0 87 for about three months now thanks to one gas station offering it for an extremely reasonable price (typically 5 cents more per gallon than E-10) and not changing the price one single cent in at least the three months I've taken notice. This does mean that sometimes this E-0 has been cheaper than any E-10 around at times. I've been running this fuel in both of my vehicles without issue. I have been noticing my Elantra falling on it's face some when getting on it (I unfortunately frequent a very short highway onramp that makes you go from a stop sign to 70mph in exactly 397 feet). I have also noticed what feels like some gear hunting at lower speeds (10-15 mph) when gently accelerating. I remembered my original post and since I was doing an oil change anyway, I decided I'm done screwing with these abysmal plugs. I triple checked all of the websites regarding my plug choice for this Elantra. Still, NGK doesn't make a plug for the 2017-2018 Elantras. So I decided to call Hyundai and work backwards. I asked what plugs were needed for my car (I supplied the VIN). Then I asked if a 2015 Elantra (1.8L) uses the same plug. He said no. But he did say that the Velosters use the same plug. So I started searching under the Veloster for NGKs. Just like the Elantra, it doesn't exist. I finally got irritated enough and decided I'm rolling the dice no matter what. I'm 100% done with these YURAs. So I start pulling the plugs. Keep in mind these plugs were already changed by the dealer at 28,736 miles. These 'new' plugs were pulled today at 37,685 miles. Here's the picture of the odometer for proof:
So these plugs had a whopping 8,949 miles on them. Remember, they're also iridium. Shocker: they looked like crap...again. Here they are in order by how they were taken out of the engine (passenger side-->driver side):
Unfortunately, the picture didn't do the spark end of the plug justice. They appear respectable in this pic, but in-person they look worse and definitely darker.
So in went my NGK 9723s (SILZKR7B11). They threaded in perfectly and I did measure the length of both plugs from the gasket to the ground electrode (for piston clearance). Identical. Gap is also identical on both at 0.044. Knowing that, I didn't care if there were any other differences. They were replacing the YURAs no matter what. I refuse to believe NGK doesn't make a spark plug for one of the most common cars on the road. I replaced them, finished my oil change, and took it for a spin.
I should have put the NGKs in the first time. It's noticeably more responsive, it doesn't seemingly 'hunt' for which gear it wants when you roll that rural stop sign, and most importantly it doesn't fall on it's face in the higher RPMs. Quite the opposite. This car has never felt this good. Ever. And once again I am reassured there are zero transmission issues. It was all related to the plugs.
I will report back if there are any issues running these NGK 9723s, but based off of my 10 mile test drive to ensure it got fairly hot, they were stellar. So unless I report back stating otherwise, let this be reassurance to anyone else tired of the horrid YURA plugs: the NGK 9723s *DO* work in a 2017-2018 Elantra, even if all the parts stores and NGK tell you otherwise.
