Wouldn't advise any additives...

 

Care to elaborate pros and/or cons

 

Pro: best scenario = it does nothing
Con: worst scenario = it damages everything it touches

 

That's all ?


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Does anyone have any thoughts on fuel additives (i.e. techron. Moly jectron moly ventil sauber,etc.)
For direct injected engines?

Fuel injector cleaner maybe but the traditional valve cleaners seem more designed for legacy injection where they are upstream of the valves.

Just wondering what to do for the Macan.

I only use shell premium gas cannot find pure gas much around here and i cannot control ethanol content.

I add jectron and ventil sauber to the 993 about every 7500k miles.

That's more than sufficient in my book. Shell > everything else. I generally go after name brands (Sunoco, Exxonmobil, BP, etc.). I can't find any pure gas around my area unless I drive 30 miles+. Definitely not going to drive 30 miles just for a tank of gas...

 

In my area most service stations offer gas with 10% ethanol (E10). I agree with many, if not the majority, who believe that pure gas results in 3-4% better mileage and increased engine life. With the aid of the App "Pure Gas" you can find service stations that offer pure gas. It is often about 0.20 more per gallon than ethanol blend with the same octane rating.

The numbers:
100% gasoline has 113,000 btu per gallon
100% ethanol has 76,000 btu per gallon
Therefore E10 would have approximately 109,300 btu per gallon (about 3.3% less than pure gas).

I have decided that I am going to use 92 octane rating pure gas when it is reasonably available. What do you other Macan enthusiasts think?

Thanks to notmac1 for the lead on the "Pure Gas" app from the App Store.

 

Unfortunately in the republic of New Jersey, pure gas is nowhere to be found.

 

Does anyone have any thoughts on fuel additives (i.e. techron. Moly jectron moly ventil sauber,etc.)
For direct injected engines?

As long as you are buying gasoline that meets Top Tier standards for fuel additives, you'll be fine. Most of the majors meet Top Tier standards, and Costco does too. They usually have a sticker or a sign on the pump indicating that....and I'm sure there's an app for that too.

 

Gas additives not only clean injectors, they also clean buildups and condition the whole fuel system which includes fuel pumps, fuel level sensors, one way valves, etc. I have been using fuel system cleaners for the past 20+ years, and so far they only did more good than harm.

If anyone's interested, try Sea Foam. IMO it's the best cleaner available...and yes, been using it for years.

My 2 cents....

 

Well, the point is if you use good quality gas there is no need for additional fuel additives. Most 3rd party additives do nothing or worse.

 

I have used different brands of top tier fuel in my Macan and my better half's Lexus IS-250.Both vehicles ran rough and had poor fuel economy on Costco and Exxon,Sunoco was ok but just marginally better. Shell 93 was the best in terms of acceleration and fuel economy (I am not employed by Shell). I have never used a fuel additive since I use the 93 premium,that's enough.

 

I added Red Line Complete fuel system cleaner once @ around 10,000km.

No adverse issue at all. I am now at 15,000km. I do plan to do this again at every 10,000km. Whether it works or not in cleaning out gunk on valves would remain unknown. But based on various forums I read up on, it does make a bit of difference, only when used on a shorter mileage intervals.

 

I think you can save your $ on Red Line.

Seriously, good gas will continuously clean the fuel system. Once you already accumulate significant gunk there, fuel additives will make it worse by trying to clean it out.

Example, a friend had a BMW for 10 years and never flushed the brake fluid (it was literally black). He then flushed the whole brake system at once, which promptly failed right after. All the seals were swollen in the water saturated old brake fluid. He suddenly dumped in brand new fluid causing the seals to fail immediately.

 

My advice: Fuel additives = FEW (i.e. none) additives.

 

Slightly off topic, but I've never noticed a significant change with any "in the tank" additive. I used to be in the service industry and "through the rail" injector cleaners (not D.I. Though) could be very effective.

I just traded my modded VW GTI 2.0L Turbo running an APR tune, down pipe, cold air intake that made about 260 HP. They were known for valve deposits (also DI, so it's not from fuel, its from crankcase vapors recirculating) . I did run Seafoam directly through intake and it definitely had an affect of performance. I had my valves checked during an intake replacement at 60,000 and the tech said they looked like they had 20,000-30,000 miles worth of carbon on them. So I guess it helped.
About the only way to really address the issue was to install a catch can system that separated the oil from the crankcase vapors.

I can't get race gas locally and those tunes are highly octane dependent to get max HP as the ECU will pull back timing the instant it senses a knock. So I researched octane boosters and came to the conclusion that anything you buy in a 8 oz bottle won't do squat in a full tank of gas. I made my own booster a gallon at a time (only did this a few times) from published formulas and I can tell you that was a "seat of the pants"difference. The engine came to life. Makes you realize how much intervention the ECU was doing on pump gas (even 93 octane). It involved MEK, Xylene, or Toluene as a base, then some marvel mystery oil as a lubricant, and mineral spirits for detergent. You could calculate the ratio and it worked out to about 1/2 gal of this stuff into 12 gals of fuel for 95-97 octane.
Nasty stuff but really did work. Never had a problem.

Wouldn't do any of this to my Macan, but interesting.

 

I have be using Shell premium gas for current & past cars. The new & improved Shell nitro+ gas is supposed to have even more cleaning detergent in it.

I thought I would just give this a try. There are some reviews suggest to use this cleaner on the interval of 1 bottle for every couple thousand of kms. To me, that's way too excessive.

 

That's how they make $ on unnecessary repairs/cleaning.

I never use any additives, in fuel or engine oil. Have run some of my cars over 10 years/130k miles and never had engine/fuel related problems. Just use good quality gas.

 

Anyone used a fuel additive on their Macan (Turbo)?

 

Good gas has fuel additives, period. You’re just adding more. I can’t imagine it having any cons of its already on the same fuel we’re already running. I’m using Techron fuel additives.