I've always gone premium in all the cars I drive, I'm wondering though with a VW engine.. Does it really need it?

Cheers

 

I'm not sure why it would make a difference whether it's a VW, Porsche, BMW, or any other modern day engine. Most newer cars say they need premium unleaded, but would it really damage the car in 4-5 years if it had mid grade or reg unleaded? I use premium really for the sake of using it. They say you get more efficiency and it's cleaner fuel with higher octanes, but that probably only matters if your keeping the car for a really long time. Would love to hear from others on this esp if they have some hard evidence.

 

I have an 05 Lincoln Aviator, 112k miles requiring 91 Octane. Been running 87 Octane for nearly seven years with no issues in Florgia. In the mountains I sometimes put in 91 but not often. Never any knocking or other ill effect.

Having said that, the new Cayennes are so advanced that the engine "knows" you have lower octane and reduces performance accordingly. Don't know how this will affect the vehicle but plan on 93 all the way on the CS.

 

I use non ethanol when possible and up to 97 if I can get it.

 

In Germany,not only do they have the autobahn,but you can also feed your pepper this...

 

Is that a RON number so probably equivalent to 98 US?

Notice better performance?
What's the highest RON or (r+m)/2 US people put into their stock cayenne's. State your model if you can answer.
Anyone ever put the fuel additives that raise the tank % to around 100 octane, US so about 107 RON...

Jet fuel?

I have access to all, just asking...
What are the risks for our engines/seals with too high of an octane?

 

jet fuel is kerosene dont be that guy......

 

Ha, I'd never put straight jet fuel without a few mods.
Highest I go is 102 without ethanol on a daily basis, sometimes 105 if I can get it.
Gas stations in CO do 91 as the highest 93 equivalent at sea level.

 

Kerosene is not octane based.......its comparable to diesel....which i wouldnt associate with power or high compression returns?

From what I understand...the higher the octane, the higer the ignition point, thus creating more pressure when combusting........and kerosene actually lowers the temperature of combustion.....

Maybe the mixture of kerosene and gasoline would make for a nice splosion before taking off the line.......

Rocket fuel is liquid air and kerosene...so maybe theres an option??

I think you mean with mods or in racing corners, more of a methanol and ethanol based engine.......

I used to hear rumors of 100-110 octanes in california around late 90s to early 2000's....