Shell uses ethanol, even in vpower. Its gas, ethanol and vektron additive.

 

I have never used premium in any vehicle I have ever owned. At least not on a regular basis. Every once in a while I would run a tank of premium through a few of my cars.

 

Diesel, I'm missing your point. Do you get good mileage with that Shell Potion? I wonder what Vektron is/does?

 

Jeroen, you are a engineer who was involved in engine design and you don't understand that if your running 100% gasoline you will get better mileage than running 90% gasoline.
More BTUs, that is the answer! It isn't about premium and regular grades of gas it is about not having to run Ethanol!
The only time I run gas with Ethanol in it is when I can't buy something without it and in the winter to keep moisture out of my fuel tank and fuel lines

 

No, its a cleaning agent similar to Chevrons additive.

 

Well, I understand the bit about ethanol. But as Ethanol has about 75% BTU compared to Petrol, so with a 10% mix you should get a 2.5% MPG improvement at best. In practice it's probably less than half that. And that's really hardly noticable.

Not like the 6-7 MPG mentioned.

Actually, I moved from Europe to the US a little wile ago and I hadn't realized untill now that Ethanol gets mixed in the petrol. Is that common practive troughout the US?

It's only starting to happen in some European countries. I do know that Ethanol can create problems in older cars as some of the materials in for instance carburator systems and even injection systems dissolve over time due to the ethanol.

Jeroen

 

http://www.epinions.com/content_2346164356

 

I run a 2005 F150 I get 15.2-15.6 with regular with Ethanol. I get 16.9-17.4 running the premium I get here that doesn't contain Ethanol. On one tank full I got 18.3 but that was all highway no stop and go so I consider it a fluke.
That is what I get in my 2005 F150 so what ever you think the results would be these are the result I get in my pickup.

 

wow i thought i was the only one that noticed this. i drive a trans am that requires premium, and i did the same thing by mistake, i also thought mine was quieter and ran smoother, but didnt think much on it. just thought i was having a good week!!!

 

Ok glad I'm not the only one. I don't honestly care what people say that it won't do anything, it has made a noticeable difference and it's not just my imagination. My gf drove my Jeep today and even mentioned it was quieter. Why? I don't know, perhaps I was experiencing some mild detonation under load and running premium has cured that? I don't know.

Also on a related note. Running regular in a car tuned for premium can have reverse affects. My car factory required premium and I once filled it with regular on accident. It bucked and jerked and was noticeably down on power. Then, after my supercharger was installed, it was re-tuned and again for premium only. My brother borrowed it once and put regular in it. The car basically went into limp mode, my CEL came on, if I went into boost it would start detonating.

 

first statement is true - even backed by the link provided. Cleaner burning fuel means less carbon build up which means smoother running engine due to a lower chance of preignition.

Second statement is argued back and forth and I also forgot to put the ".." around cleans. My fault. Like I said though, the best thing to do it tear it apart and clean it. That's the real answer for anyone with a high mileage engine (over 100k).

 

wow this makes me wanna look into stuff!

 

I put premium in last fill up.

Now my tires are going flat. Why?





LOL, J/K!!!!!! I think I am going to use premium all the time. My Jeep seems to like it. She's spoiled, I think.

 

Gas without ethanol is heaver?

 

I had never thought of crud buildup affecting compression, maybe thats why my 84 ford Bronco 300 6cyl has 170psi of compression? And yes the gauge is working properly 170 psi compression on a 4.9l ford inline 6