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Hey guys, I'm fresh here. Did a bit of a search and couldn't see many questions relating to this..

I bought a 2006 Mazda 6 gsx wagon 2.3L w/ 6 speed manual
I've noticed when shifting between 5th and 6th there is a very small difference in rpm. Cruising on the highway at 100kmph (62mph) in 6th it's almost bang on 3000rpm and 130kmph (80mph) is close to 4000rpm. This obviously means with long distance highway driving I will have to stick to a lower speed or I will burn through the gas.

Any reason Mazda has designed thier cars like this?

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Thats because on most cars 4th is a 1:1 ratio while 5th is around .74:1 and 6th is .66:1. On my 3 6th @80 mph is around 3000. So i would check your tire size like Dr said, you might have the wrong size on there.
 

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Discussion Starter #7
Thats because on most cars 4th is a 1:1 ratio while 5th is around .74:1 and 6th is .66:1. On my 3 6th @80 mph is around 3000. So i would check your tire size like Dr said, you might have the wrong size on there.
Yeah looks like ill have to. I do have original factory wheels and spec tires (205/55R16).
 
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