Re: Hi to all
No, the H2 runs on regular. The owners manual says use regular unleaded gasoline with an 87 octane rating and the salesman at Lynch (who has been in Hummers since they started) says putting in midgrade or premium is just a waste of money and won't increase performance or engine life like it can with some models.
I had heard the same thing about the H2 running on premium. I think it's all part of the politically & environmentally incorrect information being spun on big rigs and Hummers. I have heard several people already say OMG how are you going to get by on 8 mpg with that Hummer? Well, if you use low range and do a lot of offroading, maybe that's true, but let's face it, how often do you use low range?
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