Fuel injection cleaning

[Needlz78]

I’m at the dealer right now and they are recommending fuel injection cleaning and air induction. Are these required to keep your warranty? My friend said fuel injection cleaning is like the easiest thing but wondering if dealer needs to do it in order to keep my warranty. Let’s say fuel injectors go out because I didn’t do the service but I still don’t think it’s required

 

[Alfer]

Not needed. They are just scamming you out of money.

 

[David-R]

The manual for my 2025 G70 says that if top tier detergent gasoline is not available use one bottle of fuel additive every 8,000 miles or 12 months.

 

[joegr]

I'll bet that is just this stuff with a Hyundai label over it.

Techron Concentrate Plus Complete Fuel System Cleaner 20oz bottle - Walmart.com

Buy Techron Concentrate Plus Complete Fuel System Cleaner 20oz bottle at Walmart.com

www.walmart.com

 

[David-R]

I'll bet that is just this stuff with a Hyundai label over it.

Techron Concentrate Plus Complete Fuel System Cleaner 20oz bottle - Walmart.com

Buy Techron Concentrate Plus Complete Fuel System Cleaner 20oz bottle at Walmart.com

www.walmart.com

Probably is and it’s cheaper. When I put in my vehicle, Walmart says it “doesn’t fit”.

 

[Volfy]

100% the same thing. They just slap their own label on the same bottle. Hyundai owns a lot of stuff for vertical integration, but they for sure don't own Chevron.

That said, fuel additives like Techron are great for engines with port injection, like the 2.5T. However, for GDI engines like 2.0T and 3.3T, it won't do anything for intake valve coking. Probably does help clean the GDI injector nozzle and the piston crown to some extent, but that's about it.

If the dealer is talking about intake valve cleaning, then that might be worth something. My guess is though, they'll charge your credit card and probably just dump that bottle of FI cleaner in the fuel tank. Heck, they might even forget to do that. How could you tell?

 

[SoCalG90]

I am guessing they will use the BG intake cleaner

 

[Speeder]

100% the same thing. They just slap their own label on the same bottle. Hyundai owns a lot of stuff for vertical integration, but they for sure don't own Chevron.

That said, fuel additives like Techron are great for engines with port injection, like the 2.5T. However, for GDI engines like 2.0T and 3.3T, it won't do anything for intake valve coking. Probably does help clean the GDI injector nozzle and the piston crown to some extent, but that's about it.

If the dealer is talking about intake valve cleaning, then that might be worth something. My guess is though, they'll charge your credit card and probably just dump that bottle of FI cleaner in the fuel tank. Heck, they might even forget to do that. How could you tell?

I've read the Genesis Smartstream motors (since 2020) use the MPi (multi-port) method most of the time under normal driving conditions and add the DPi (direct port) under more aggressive situations.

 

[Volfy]

I've read the Genesis Smartstream motors (since 2020) use the MPi (multi-port) method most of the time under normal driving conditions and add the DPi (direct port) under more aggressive situations.

I've read that too, but that is actually opposite of what I would think should happen. GDI is much more able to adapt to low engine load, like easy highway cruising, by injecting just a small localized fuel charge near the spark plug just prior to ignition. This helps MPG tremendously by allowing for a very lean overall AFR at higher compression ratios without touching off pre-ignition. This is why GDI version of the same MPI engine is typically much more fuel efficient. At the same time, GDI can also be more powerful if the demand calls for it, by being able to inject the amount of fuel per each combustion cycle much more precisely. I've driven several Hyundai/Kia with older MPI version of the Lambda 3.3L, and know first hand the practical difference between the two.

MPI cannot do GDI's stratified intake charge mentioned above, because it injects fuel in the intake port before the charge air enters the combustion chamber. Unless fuel is cut completely, the overall AFR will need to be held close to the stoichiometric 14.7:1, because that intake is basically a homogeneous charge of air + fuel. That potentially waste fuel in a very low engine load condition, like freeway cruising.

I've gotten upwards of 43mpg on my old commute route with my 2.5T, when the conditions are just right. That's driveway to parking lot. I highly doubt it could do that by operating on mostly MPI.

The downside to GDI-only, of course, is the infamous intake valve coking. That is primarily why Smartstream adds the complexity (and weight) of GDI+MPI.

 

[BillZ]

I am guessing they will use the BG intake cleaner

Today I took my GV80 3.5 in for its last oil change and service under the 5 year coverage provided to Canadian owners. Looking carefully at the invoice, it appears they used a container of BG Supercharge 2 as the fuel additive in place of a Hyundai part number used on previous service appointments. As there is no charge for these services, it doesn't appear that they are doing it just to rip off the customer and presumably Genesis Canada would not be reimbursing them if they did not approve the use of this additive. But I'll ask the service manager and see what he says.

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