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Originally Posted by Tom1222
I can see where you got great gas mileage from Vegas to California. That portion is mostly downhill.
....At least it is consistant. Plus I didn't buy the Si for super duper gas mileage but for the fun factor it provides at a reasonable amount of gas mileage.
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It is a 'bit downhill, but lets be real: Las Vegas 2028' - San Berdoo 1200' - Whittier 300'. So an 800' elevation change from vegas to San Berdoo and another 900 to Whittier. I'll give it a bit, but my return mileage was comprable to my outbound so I have to disagree. (Fill before leaving, fill at destination...drive on fill until about to leave, fill for trip, fill when back in Vegas, all so I know what my true HWY MPG was). I'll certainly give that the hill out of San Berdoo and the hill out of Baker are gas eaters, however, the hill out of Baker on the far side is just as bad, then it is slight ups and downs, then a gradual uphill climb to the Cajon pass, then down again. If you just 'have' to go significantly over 65, you are going to get well below 30 for the just about any road trip. (As a reference today I was looking at MPG at 80mph on a flat stretch and it was 24.5mpg, rapidly dropping below 20 on any sort of mild incline)
I can drive about Vegas and get over 30mpg quite readily by just using cruise when I can and not going over 65 (if I am trying to 'see' what I can get on a fill), however, as I stated in my first reply, that is not what the car is about, just a bit of an odd obsession by a few owners to see what they can squeeze out by using their OBDII scanner.
My last 'fill' was a good example of when I just don't care about mileage: 25.5mpg (just filled tonight), which included quite a bit of 80+ roads, spirited Spring Mountain Ranch driving, and some zipping around Mt. Charleston.