injector cleaner 2021 2.7 1500 silverado

[Grumpy Bear]

On 6/8/2026 at 1:56 PM, Leroy114 said:

How often should the Techron be added? im at 34,500 miles and thinking now is the time to start trying to help the carbon buildup.

 

   thanks

 

GDI Injector tips are in the combustion chamber and yes, they are subject to the same aromatic hydrocarbon based carbon build up the entire chamber is subjected to. Chevron Techron is a PEA based cleaner (polyether amine)  that is VERY effective if the dose is high enough.  Carbon the tips disrupts the spray pattern so keeping them clean is kind of a big deal. It will clean more than the injector tips. It will keep the inside of the injector tip clean as well. When they shut off they 'hot soak' building varnish internally behind the pintle. The tip, unlike most MFI systems have several orifices of very small diameter. They have to stay clean to work right. That spray pattern is supposed to spray into the cup in the piston, not all over the cylinder walls. Old guys will understand... 

 

Top Tier Chevron has enough of the cleaner to be effective if used regularly. Other solutions could be Shell V Power Nitro + Premium and Exxon/Mobil Supreme Plus Premium ONLY use a different chemistry to the same effect with the added bonus of a friction/antiwear additive as well. Red Line SI-1 is PEA based as well with an upper cylinder lube. There's a white paper on their site for shock treatment of system left untreated for long periods. AMSOIL PI has a full system cleaner of yet another chemistry that will strip carbon out of the power cylinder pretty quick. Gumout Regane is also PEA based but at very low doses and those that are isopropanol based will not be effective. Alcohol content is way to low. Chevron Techron in any pump gas, Use by package instructions. 10 oz per 15 gallons every 3,000 miles. First use may require two treatments. 

 

So, Techron, Red Line SI-1 and AMSOIL PI if batch treating and Shell, XOM Premium or any Chevron Fuel will not just keep it clean, but will clean it if dirty. No other fuel "I'm aware of will do that". 

 

Flex Fuel motors. If you use at least 40% alcohol on a regular basis they won't carbon at all. PEA is not recommended for fuels over E-20

 

 

(www.carparts.com)

Edited June 10 by Grumpy Bear

[Black02Silverado]

This is a good video on fuel additives and their effects.  It's long but well worth the time. Very good information. 

 

 

 

[Leroy114]

16 hours ago, Grumpy Bear said:

 

GDI Injector tips are in the combustion chamber and yes, they are subject to the same aromatic hydrocarbon based carbon build up the entire chamber is subjected to. Chevron Techron is a PEA based cleaner (polyether amine)  that is VERY effective if the dose is high enough.  Carbon the tips disrupts the spray pattern so keeping them clean is kind of a big deal. It will clean more than the injector tips. It will keep the inside of the injector tip clean as well. When they shut off they 'hot soak' building varnish internally behind the pintle. The tip, unlike most MFI systems have several orifices of very small diameter. They have to stay clean to work right. That spray pattern is supposed to spray into the cup in the piston, not all over the cylinder walls. Old guys will understand... 

 

Top Tier Chevron has enough of the cleaner to be effective if used regularly. Other solutions could be Shell V Power Nitro + Premium and Exxon/Mobil Supreme Plus Premium ONLY use a different chemistry to the same effect with the added bonus of a friction/antiwear additive as well. Red Line SI-1 is PEA based as well with an upper cylinder lube. There's a white paper on their site for shock treatment of system left untreated for long periods. AMSOIL PI has a full system cleaner of yet another chemistry that will strip carbon out of the power cylinder pretty quick. Gumout Regane is also PEA based but at very low doses and those that are isopropanol based will not be effective. Alcohol content is way to low. Chevron Techron in any pump gas, Use by package instructions. 10 oz per 15 gallons every 3,000 miles. First use may require two treatments. 

 

So, Techron, Red Line SI-1 and AMSOIL PI if batch treating and Shell, XOM Premium or any Chevron Fuel will not just keep it clean, but will clean it if dirty. No other fuel "I'm aware of will do that". 

 

Flex Fuel motors. If you use at least 40% alcohol on a regular basis they won't carbon at all. PEA is not recommended for fuels over E-20

 

 

(www.carparts.com)

Thanks for the info, ive decided to use only Chevron fuel from now on, the answer i was looking for since i posted this subject; Thanks to everyone for your input.

[TheGeek]

From what I gather, you have a 2.7 Diesel  You cannot use Chevron gas in it.  Howes has a diesel add-in and it states it cleans injectors.  Me personally, wouldn't bother with it.  If it's not broke, don't fix it.  

 

Just my two cents worth. 

[Leroy114]

2 hours ago, TheGeek said:

From what I gather, you have a 2.7 Diesel  You cannot use Chevron gas in it.  Howes has a diesel add-in and it states it cleans injectors.  Me personally, wouldn't bother with it.  If it's not broke, don't fix it.  

 

Just my two cents worth. 

I have a 2.7 turbo gas engine. 310 hp. not diesel

[TheGeek]

Maybe I missed that...getting old.  Yes, I would use Techron first then use the Chevron gas to help keep them clean.

 

Back in the day, I was a Service Manager for a BMW dealer and we would use the walnut shells to clean the exhaust port in the head, but, everything had to come apart and a special machine would blast the chamber with the shells and vacuum it out at the same time.  It is not for a "Harry home owner" to do.  I wouldn't bother if it is running smooth. 

 

There's my nickel.  LOL

Edited June 12 by TheGeek