Car is a 2011 Sonata with 2.4L GDI engine.
It now has 45k miles and would ping badly on 87 octane, less on 89 and none on 93 octane.
I have ran various fuel system cleaners through the gas tank with no improvement.
Car gets 3750 mile oil changes with Valvoline 5w30 synpower.
I called around a few indy shops to get a price to have the GDI cleaning done. Prices ranged from $99 to $149, and none of the shops really explained what was done, or the service.
Anyways, I bought a 13 dollar bottle of CRC GDI Intake Valve cleaner from Amazon, decided to try it out. I bought the stuff because it had decent reviews, and it had a permanently affixed straw to the bottle. I was worried about blowing a plastic straw into a running engine!
Had my wife hold the throttle around 1500-2000 RPM's while I sprayed the can of cleaner into the intake.
Car sputtered a little bit but never stalled, and there was no smoke out of the tailpipe or unusual sounds.
Reading the instructions says to shut the car off after spraying in the whole bottle for one hour, and let it heat soak.
Then restart the car, and take a spirited drive.
I followed the directions exactly and never had any smoke or unusual sounds out of the engine.
So, I'm happy to report that I have burned two full tanks of Sams Club 87 octane fuel with almost no pinging at all.
Temperature has been around 100f the whole time. I can recall one time it pinged very slightly at a low speed in the past two tanks of gas. Other than that nothing.
I am not recording timing or anything with an OBD2 scanner, but I can feel the ECU is pulling timing on the 87 octane fuel, and it runs much better on 93, but I'll stick with 87 its not a Maserati.
I'll continue to dump a bottle of Techron into the fuel tank every 3750 miles, as per Hyundai recommendations, and I'll continue with the 3750 mile oil changes (severe service).
This motor is a dirty pig, but its nice to have it well sorted and running on regular fuel. Sams Club is not top tier, but it is a brand new station and they move a lot of gas.
CRC recommends to use their product every 10k miles in a GDI application. I think I might buy it once a year.
It now has 45k miles and would ping badly on 87 octane, less on 89 and none on 93 octane.
I have ran various fuel system cleaners through the gas tank with no improvement.
Car gets 3750 mile oil changes with Valvoline 5w30 synpower.
I called around a few indy shops to get a price to have the GDI cleaning done. Prices ranged from $99 to $149, and none of the shops really explained what was done, or the service.
Anyways, I bought a 13 dollar bottle of CRC GDI Intake Valve cleaner from Amazon, decided to try it out. I bought the stuff because it had decent reviews, and it had a permanently affixed straw to the bottle. I was worried about blowing a plastic straw into a running engine!
Had my wife hold the throttle around 1500-2000 RPM's while I sprayed the can of cleaner into the intake.
Car sputtered a little bit but never stalled, and there was no smoke out of the tailpipe or unusual sounds.
Reading the instructions says to shut the car off after spraying in the whole bottle for one hour, and let it heat soak.
Then restart the car, and take a spirited drive.
I followed the directions exactly and never had any smoke or unusual sounds out of the engine.
So, I'm happy to report that I have burned two full tanks of Sams Club 87 octane fuel with almost no pinging at all.
Temperature has been around 100f the whole time. I can recall one time it pinged very slightly at a low speed in the past two tanks of gas. Other than that nothing.
I am not recording timing or anything with an OBD2 scanner, but I can feel the ECU is pulling timing on the 87 octane fuel, and it runs much better on 93, but I'll stick with 87 its not a Maserati.
I'll continue to dump a bottle of Techron into the fuel tank every 3750 miles, as per Hyundai recommendations, and I'll continue with the 3750 mile oil changes (severe service).
This motor is a dirty pig, but its nice to have it well sorted and running on regular fuel. Sams Club is not top tier, but it is a brand new station and they move a lot of gas.
CRC recommends to use their product every 10k miles in a GDI application. I think I might buy it once a year.