Additives in gas tank - yes or no?

I wouldn't. 91 is min, 93 is perfectly fine.

 

Chevron has techron which keeps the fuel injectors clean or you can buy the additive separately.

That's all I'd do.

 

No

 

Lucas fuel injector lubricant/cleaner at 3 oz. per 10 gal. Try to run zero methanol as well.

 

I use Royal Purple Max-Clean and Royal Purple Max-Boost. Both working really well. The Max-Clean helps counter the harmful effects of ethanol in today's fuel. And the Max-Boost kicks the octane level up a few points.

 

If you only run your car 1-2 times a month and the same gas sit in the tank for months, put a little stabilizer in there. Run 93, as it will be less of an issue if the octane drops. As for cleaners and what not? Don't run it all the time. Burn clean fuel, and run an injection cleaner once or twice a year to make sure nothing gums up. No need to run it all the time. The more clean fuel, the more power, and the happier both your engine and you will be.

+1 on running non-ethanol fuel if possible. Not only does ethanol bring down the power, it can be an issue on rubber and plastic parts in the fuel system. On top of that, ethanol is very hygroscopic.

 

Common sense leads one to reason that non-ethanol fuel would be better, but unfortunately that is not necessarily true for modern cars that are set up with ethanol in mind (there was a tech response in Porsche Excellence that addressed this very question and changed my practice of non-ethanol).

That being said, I run non-ethanol in all my vintage cars (i.e. carbureted, etc.) and premium fuel with ethanol in all my modern cars.

 

Not a Porsche guy, but can you describe any example of where ethanol is good for rubber or plastic? I have seen it turn rubber fuel hoses into bricks that crush easily under force.

 

I've no idea about UAE RON value's, but 93 Octane in the states is equivalent to around 97/98 in Europe.

Different way of measuring it basically.

 

Dubai also run the Research Octane index like Europe. My guess is that 100 in is like the 99/100 we have in the EU, which in turn is similar to a US 94-95 AKI(R+M/2).

 

I run a 991 as a daily, and there's nothing that makes ethanol fuels better for that car, it is just built to handle it. As with any ethanol fuel over non-ethanol fuel, the millage gets worse, and the power decreases - the density of the petrol goes down, and the BTU of ethanol is 30% less than what it is in regular petrol. What exactly did that Porsche tech tell you?

 

I've never added anything to my tanks in any car I've ever owned....


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I wouldn't put anything in the tank that Ferrari doesn't specifically recommend. Most of that stuff is snake oil as far as I'm concerned (with the exception of stabilizer when storing the car for 6+ months)

 

Manual states that you can run up to 10% ethanol without harm to the engine. Nowadays, every gas station has ethanol. They all get it from the same oil refineries.

 

Interesting thread I don't put anything but Shell 93 in my 458.

 

For ethanol based gasoline, I recommend using this stabilizer if you wont be driving the car for a while...ie: winter storage
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I suggest you read the tech notes section in the Sept edition of Excellence (#221), page 34. While in reference to a 991, in short it says the engines are designed for and need ethanol....... Maybe its not optimal, but if the engine and ECU are designed for it, then that's what it is.

A couple of points that are made:
--Ethanol provides a cooling effect
--Minimizes carbon build up
--slows burn rate in the combustion chamber

Sometimes we need to stop trying to be smarter than the people that design the cars that understand all the parameters that need to be considered........

 

I have owned up to 16 cars at one time that I put from storage to drive as I wish.

Since the cars sit for a long time before being driven I use Staybil in these cars so the gas does not turn to jello. I have had no problems doing this.

When I bought my 1954 Corvette it had not been driven and it had gas that was turning. The acceleration was gulp and then be okay for a few miles. I just worked thru the bad gas. The gas begins to turn in three months. IT is not a problem for most people.

The older cars are not good on the new dry gas. I put gas lubricant in my 1954 and 1965 Corvettes. These older cars with newer gas will stick a valve. When a motor is rebuilt the owner can have the new valve metallurgy placed in the valve seats.

Other than that In agree with the poster that most of the stuff is "snake oil"

Best

Lee

 

I use BK-44 before an oil change in my cars. For me, it cleans fuel system and some carbon deposits, if there is any. For storage, I use mostly Star Tron, or occasionally Sta-Bil marine. Ideally, for very long term storage, I use non ethanol fuel.

 

Here's something interesting. Here in the EU, not all, including my country sells petrol with ethanol. I run Shell V-Power in mine, and I've never heard a Porsche tech say anything about ethanol being a must. Next time I go to Stuttgart or Leipzig I want to dig into this.