Like many other people lately, I've been researching the best fuel mileage cars and wouldn't you know it, I've decidede I need an early to mid-1990s Civic . I noticed that Mpgomatic.com lists two different fuel mileages for what appears to be the same vehicle. For example, in 1990 there are two mileage quotes for a CRX HF, both with 1.5L M5 manual trans; one is 49/52, the other 43/49. What's up with that? Thanks.