A smoother drive?

Let me just say on the onset that I'm not a car expert. I can tell different models or makes of cars apart, but if you asked me how powerful a car was, or what year model a certain car is, I wouldn't be able to tell you. Neither am I an engine expert. If I took apart my car's engine, I might as well buy a new car as I'd never be able to put the engine back together. Oh, and one last thing - I'm in no way affiliated to any of the brands I'm going to mention later in this post, though I wish I was so that I'd get paid megabucks for it.

Okay, now that that's out of the way - let me ask in introduction what petrol brand do you use? When I first got my car about 9 years ago, I was a Shell user through and through. I guess it was because my parents used it and nothing else, so I was just sort of continuing the tradition. Yes, yes...lousy reason, I know but that's what it is.

But, then a friend told me about how Esso fuels were much better - your car had more power, and the drive was smoother. I didn't try it then and there, but I eventually did. And what did I find out? True enough the car responded better, and the drive was smoother. It was almost as if I had just had the car serviced. And ever since then I used Esso almost exclusively. But, just last week I filled up with Shell again as no Esso stations were open on my way to work, and the car was running dangerously low on fuel. And since I'd pass a Shell station on my way, so that's where I filled up. No perceptible difference...

until...

with the tank about half full, I filled up again at Esso yesterday. So, in my tank was half Shell, half Esso. I can't say whether the drive felt any different then, but just this evening, it did - quite perceptibly. The car was quieter, and smoother. I told my wife that it felt just like the first time I filled up with Esso.

So, here's the thing. Each fuel company promotes its own fuels saying how good they are and I suppose each adds their own special formula of fuel additive as well. But, I'm just wondering if mixing those two will actually give 'better' performance. My wife suggested that I try filling up using alternate brands next time. I suppose I'll try just to see if this continues.

Now, I must say that what I've said is just based on my observation and 'feel'. It'd be interesting to know if anyone else has a similar experience. Drop me a comment if you do or don't think that mixing different brands of fuel has resulted in better performance for your car.

It could be just that I'm imagining things.