Quote:
Originally Posted by thinkxingu
Many of today's turbo engines don't "need" premium but run better with it. For example, Ford lists two different sets of power numbers for their Ecoboost engines, one for 87 and one for 91+.
My Bronco absolutely performs better with super (and gets better mileage), and Top Tier at that.
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This is correct. To this point the newer "ecoboost" engines as Ford calls them, the owner then has to decide to a) pay more for the gas and the engine runs better and gets better gas milage or b) pay less and get less gas milage; and then see which is cheaper for them in the long run depending on how you drive a car.
I have a girlfriend years ago that got a Jetta Wolfsburg edition with a turbo. Within a year of putting 87 octane the engine had built uo a ton of carbon in the injectors and the car cut out on the highway (at least that is what the mechanics said at the time). They weren't going to put it under warranty because she used 87 octane until we pointed out the sticker on the gas cap said 87 and not 93. The Manual said 93 though. We finally won and they fixed it.
Different cars respond differently to different octanes is basically the lesson. And some engines run fine on any octane. I know some people that only use 101 in their small engine yard equipment. (still looking for a station that has that at the pump up here)