You put the car in the gear, take your foot off the clutch, and the car is "locked" in that gear until you remove it. The reason manual transmissions used to get better mileage is because there's no "slop" in them. RAY: The second factor is the lock-up torque converter. And that improves the car's overall mileage. TOM: The more gear ratios you have available, the easier it is to find the most efficient one at any given moment. They use pulleys to constantly adjust the gear ratio, giving them, theoretically, an infinite number of gears. RAY: There also are continuously variable automatic transmissions (CVTs). And with the international "gears race" in full swing, I'm sure 10- and 11-speed automatics are just over the horizon. It's not uncommon now for automatic transmissions to have between six and nine forward speeds. RAY: But, in general, we do believe that modern automatic transmissions do as well as or better than manual transmissions, as far as mileage. For some reason, the highway numbers often come pretty close. In our real-world testing, the mileage numbers we get often are lower - particularly in city and mixed driving. TOM: So the EPA numbers are really just estimates. And another case in which Ford admitted to some "calculation errors," and had to revise downward the mileage numbers for a bunch of its hybrids. RAY: We know of at least one case of admitted fudging, by Hyundai. The EPA doesn't actually test any cars the manufacturers do the testing and then report their numbers to the EPA. You're right to be a bit skeptical of the EPA's mileage numbers. What's your opinion, and do you think they just quit testing the manual cars, and slap on the same rating? I'm looking to buy a new car, maybe manual. But for the past several years, as manual transmissions become increasingly scarce, the dealers (and EPA) claim that the mileage is the same due to improved automatics. To get an accurate valuation on a specific model check out our valuation tool.Years ago, it was understood that manual-transmission cars had better fuel economy than the same cars with automatics. After a typical three-year/36,000-mile ownership period the CX-30 should hold onto around 52 per cent of its original value, with the mild-hybrid Skyactiv-X version in Exclusive-Line trim performing the best. Our experts predict that the Mazda CX-30 will have strong residual values. You can get personalised car insurance quotes fast with our comparison tool powered by Quotezone. Even so, excluding performance SUVs, such as the Audi SQ2, most model ranges are roughly comparable with the Mazda on insurance costs. At the same time, alternatives such as the Skoda Karoq can both undercut and exceed the CX-30’s insurance groups depending on trim. Premium models such as the Audi Q2 can sit in much higher insurance groups – as do some less upmarket rivals, such as the Peugeot 3008. How these groups compare to rivals varies. Interestingly, automatic gearboxes in some specs (for example SE-L Skyactiv-G) sit one group lower than the same trim with a manual transmission. Limited edition 100th Anniversary versions (no longer available) are slightly worse and qualify for group 21. That said, the highest group any of the core models can sit in is 19. Entry-level Mazda CX-30s should cost the least to insure, sitting in group 12.
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