woodranch

Has anyone heard of 44k. It is an additive that Porsche dealers supposedly add to the fuel tank when cars are serviced. They are suppose to keep fuel injectors clean and help with MPG. One of the techs told me about this stuff but I have never heard of it. Comments are welcome...Thanks

SeanR

BG is a great company that has some great products.

Having said that, your car is too way to new to even think about having it used on it. It's a money maker for the dealership.

worf928

I agree with Sean. I've used a number of different BG products and they work.

The dealer throwing in one can of 44K once a year at your scheduled service is probably either too much or to little depending on how you drive.

But, don't discount the need to keep the injectors clean, even on a new car, more so than you might be used to. Occasional use, as opposed to daily use, with today's crappy gas can result in deposits forming more-quickly than one might think. And, at least with the 9A1 engines, the engine management software will do very strange things with dirty injectors and its diagnostic logs are really good at leading techs down dead ends.

LexVan

I don't like the idea of adding a fuel system clearer AFTER a service ( oil change). These should be used prior to an oil service.

I use Chevron Fuel System Cleaner with Techron about 400 miles BEFORE every oil change.

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chuck911

Some techs are using it that way, but you need to remember that BG44K was developed exclusively for the new 991S 4 liter air-cooled engine. Before using it I would check with Apple for compatibility.

Ma991

Fyi:

woodranch

If you read the reviews most people are very happy. However, it seems as though most of the reviewers have older cars. Do not know if many Porsche owners are using it , especially owners with more recent cars.

chuck911

April Fools aside, and I'm sure people are happy, reviews prove its the greatest thing since sliced bread and so on. But I know from examining fuel injectors taken from 911 engines with over 100,000 miles they come out looking clean and almost like new. Also have replaced very old injectors with new ones, no difference.

Also I know nobody cares. Once you've spent the money it just has to be doing something. Even when its not. But based on my experience, if I wanted to be pouring something in the tank that would actually make a difference, it would be a couple gallons of 104 octane. At least then you get a real nice patina on the exhaust pipes to show for your troubles.

worf928

You live in a magical land then. Or you examined injectors from 911s that had run continuously for 100,000 miles.

For the rest of us, fuel varnish buildup happens, injector spray patterns get nasty, injectors may not close fully, resulting in air-fuel ratios and charge uniformity gets wacky. And then engines run poorly. That's with old-technology magnetically pulsed injectors.

Maybe the only injectors you've examined were mechanical injectors out of CIS systems? Those do tend to stay cleaner than L-Jet or LH injectors.

The piezoelectric injectors used in DFI engines are another kettle of worms. When the engine management system on the 9A1 motors detects poor fueling it does really strange things and the diagnostic logs are no help at all.

I sure as hell didn't make up that or what I wrote previously. I personally got to watch PCNA's master-technical support engineers direct two dealer techs down rat holes for two months chasing clogged injectors on our 981.