I read somewhere that Techron is the ONLY fuel additive approved for use by PORSCHE. I think it was a tech service bulletin, but I can't find it now. The only restriction was no more than two bottles during each oil change interval.

Jim Mayzurk
93 GTS 5-spd

 

Yea, thats da ****

/Peter

 

Hi,
it is a myth that the engine's oil must be changed after using a fuel system cleaner such as Techron
as stated on the label

This can be proven by studying Used Oil Analysis (UOA) results (see those for my 928 in here)

Porsche's Technical Bulletin dated December 6 1985 (heck 21 years ago) recommends the use of Techron as follows;
Initially use 20 ounces to a full tank run to half full then refill the tank and repeat 2 more times

Then,
"To keep injectors clean, we recommend 20 ounces after 5 tank refills. However, never more than 20 ounces per 3000 miles"

Techron is sold under various names under Patent and was the first serious fuel system cleaner.
In particular it has proven to be excellent in cleaning and maintaining valve heads. I first become involved with this issue in 1975 (GM - Milton) when the durability of emission controls was beoing evaluated

Techron is a truely excellent product and is still a leader today

I worked for Chevron for some years in the 1960s when living in Copenhagen, Denmark

Regards

 

Great info guys, sounds like something with Techron is the way to go. Thanks

 

Does this mean that after the first dose of 20 ounces is run down to half a tank full we should add another 20 ounces, top off the tank, and run it down to half full, then add another 20 ounces, top it off again and then stop adding the cleaner until you have used another 5 tank fulls of gas only?

Just want to be clear on this, maybe the coffee isn't working this morning but I'm confused and don't want to overdose my little 928!

 

Excellent question. I was just about ot ask the same thing my self. BTW, sweet ride sfierle, looks familiar. Just cant place it though

Amen to Chevron and Techron. I have been using it exclusivly for many years in all my cars. Very good stuff.

So just to recap, the best products to use are StaBil, Jectron, or Ventil Sauber??
About twice a year??

 

I think since the bulletin said no more than 20 oz. in 3000 miles, you are supposed to add 20 oz to a full tank, run it to half, then refill with gas only, run to half, refill with gas only again, etc. I think the purpose is to give the injectors a run of full concentration/half concentraion/quarter concentration, etc. In essence, half lives of Techron until it is negligible.

Anyway, that's how I read it.

Matt

 

Hello,
I'll clear it up - the Bulletin (2440/8510) says;

STARTS
Partially restricted fuel injectors can be cleaned through the following procedure and material:

1 - Fill up fuel tank
2 - Pour 20 ounces of "Techron" into the fuel tank
Note: Techron is marketed by Chrevon
3 - The car should be driven until the fuel tank is half empty
4 - Refill the fuel tank
5 - This procedure as outlined from point 1 to 4 should be repaeted 2 additional times
6 - To keep injectors clean, we recommend adding 20 ounces of Techron after 5 fuel tank refills. However, never more than 20 ounces per 3000 miles
ENDS

As I understand it, the inital cleaning is not a maintenace dose as stated in 6) above
Remember that Techron is a complex fuel system cleaner and not only an "injector" cleaner


Regards

 

I was doing something with acetone once, I forget what, but I didn't want to leave the bottle open so I just poured some in a plastic cup, and it dissolved the bottom of the cup after a few minutes.

I didn't see anything about cleaning injectors on this bottle, just improves performance.

 

i used lucas oil upper valve lubricant and injector cleaner. it worked pretty good.
but i dunno maybe you think different

 

Techron has always worked well for me. Acetone aids in vaporization by stirring up the molecules in fuel. It can also be harmfull if not used in proper ratios. As noted by Danglerb it melts plastic. There is a lot of plastic in our fuel systems.

 

Thanks, Doug, but I'm still confused.

20 oz into a full tank, drive to half and put in another 20, drive again to half and put in another 20 - assuming 250 miles in half a tank that makes 60 ounces at 500 miles.

And further assuming, for the sake of arithmetical simplicity, a 20 gallon tank, the concentration is 1oz/gal for the first 250 miles, then 1.5oz/gal for the second 250 miles and then 1.75oz/gal for the third iteration.

And, assuming 500 miles per tank, 20 oz every fifth tank means 20 oz/2500 miles.

I admit I'm math challenged. What am I not seeing?

Confused,

Will

 

Hi Will,
yes it is all a little confusing - I just played the song but did'nt write the music!

Go off the instructions on the container or alternatively, I would do this;

INITIALLY
1 - Fill tank and add 20 ounces of Techron (or ??) concentrate
2 - Run car for at least 120 miles in one trip/one day
3 - When fuel tank reaches 1/4 full - refill
4 - Add another 20 ounces of Techron concentrate and refill tank again when at about 1/4 full mark
MAINTENANCE
5 - Use 20 ounces of Techron again at 3000 to 5000 miles intervals

However, modern fuels do have better detergency media than even a decade ago so this type of treatment may be bordering on unnecessary

Whilst no negative result has been shown in Used Oil Analysis, I always do mine in the period leading up to an oil change or immediately before

Regards

 

Doug said:

"Run car for at least 120 miles in one trip/one day"

Interesting - I had always felt that it was better to use Techron during short-trip driving, rather than on a long trip. This gives the injectors numerous "heat soak" cycles with the cleaner in the injectors.

Any comments on the difference? Damage to the fuel system over the longer dwell time? Better cleaning with heat soak cycles?

 

Always good to hear from Wally!

I've had good luck clearing a partial clog with a big overdose of Lucas product, and good luck with some removal of buildup from the back of the valves with ventil-sauber from lubrimoly. YMMV