Charles Navarro

In our area, there aren't any more top tier gas stations anymore. The Phillips were bought out by Circle K, and now all the Shells as well. We can't even get ethanol free anywhere near us either. I'm relegated to carrying a bottle of Carb Defender when driving any of my older cars (pre-2000). My 911 with CIS and Ghia with a good old Solex don't care for E10.

quickster2

I utilize 50/50 Stabil Marine 360 and Startron in all vehicles, ATV, Motorcycles, etc. During oil changes in the vehicles (typically 5K OCI) I use Techron or Redline S1. Never had a problem in many many years. Non-ethanol unleaded is close to my house & I will use this in the vehicles and boat which are not driven much in the winter. Costco is on our way frequently and is the preferred local gasoline. I agree with Don my K1300GT prefers and acts better with the 110 version of the non-ethanol. The other is rated at 91.

8202632

So here’s a question. If given the choice at shell of vpower 93 with ethanol vs 87 without ethanol, which is a better choice?

quickster2

93 top tier with ethanol especially with the stable of vehicles in your signature other than the Ford.

Charles Navarro

Always make sure you meet the minimum octane requirement for your vehicle.

TheUnscented

This month’s CarAndDriver magazine has a write up wherein they test four vehicles with 87 & hi test. 0-60 times, mpg etc. They concluded that your vehicle is safe with either but you’ll pay an outsized premium relative to any performance increase for the higher octane fuel.

They don’t compare pure gasoline vs corn-infused but the lower energy density, water absorbing, seal eating and fuel system gumming properties are already addressed here. Our letters to our betters in legislatures will get lost in a sea of apathy.

jtsmith18

Charles, in the case of a 2016 Cayenne base, which is the VW VR6, the VW Touareg and VW Atlas that also use this engine specify regular 87 octane. Do you see any harm if one were to use 87 in the Cayenne with the same engine. Porsche does spec it as 300HP vs 280 for the VW version.

Charles Navarro

Has more to do with the tune. The reason why the Porsche makes more power with the same engine is that it has more aggressive programming. Running lower octane fuel may cause the engine to pull timing, reducing power and fuel economy.

Putting higher octane fuel in an engine not designed for it won't get you any added performance, however engines designed and tuned for it should use it.

RED HORSE

Exactly. Few seem to understand what "octane" is.