Valve clearance adjustment and poor fuel economy on Mazda 5
#1
Valve clearance adjustment and poor fuel economy on Mazda 5
Hello all,
I've just had my 2008 UK Mazda5 1.8L petrol for a couple months now and a lil bit surprise on the low fuel economy (getting 31 mpg on mixed urban/country driving). What have people been getting?
Perhaps on a semi-related note, could a out-of-range (wider) valve clearances cause this fuel inefficiency (amongst other problems), does it have the good-ol mechanical rocker arm type that would mean it's easy to adjust valve clearance or does it have the newer self-adjusting hydraulic valve lifter?
Thanks!
I've just had my 2008 UK Mazda5 1.8L petrol for a couple months now and a lil bit surprise on the low fuel economy (getting 31 mpg on mixed urban/country driving). What have people been getting?
Perhaps on a semi-related note, could a out-of-range (wider) valve clearances cause this fuel inefficiency (amongst other problems), does it have the good-ol mechanical rocker arm type that would mean it's easy to adjust valve clearance or does it have the newer self-adjusting hydraulic valve lifter?
Thanks!
#2
How many miles/km are on it?
31 mpg is actually pretty (to very) good for a 5. I think I only get ~26 while mildly hypermileing.
Off valves will start noticeably making noise and running like crap first before you notice poor fuel economy. Clogged up airfilters and bad tires make a bigger difference until a mechanical problem crop up.
31 mpg is actually pretty (to very) good for a 5. I think I only get ~26 while mildly hypermileing.
Off valves will start noticeably making noise and running like crap first before you notice poor fuel economy. Clogged up airfilters and bad tires make a bigger difference until a mechanical problem crop up.
#3
Hi, it's got 77k miles on the clock. For urban traffic it's down to ~27 mpg, far cry to what Mazda claimed on this model. By bad tires I take it you mean bad alignment? Air filter was just replaced.
What do you mean by hypermileing? What year and engine size is your 5?
I love the car so far except for the low fuel economy.
What do you mean by hypermileing? What year and engine size is your 5?
I love the car so far except for the low fuel economy.
#4
In the US the Mazda5 is claimed with only 24 combined MPG. I get that around town, and get 27 or better with mostly highway. But you get significantly less (~18) if you are using your "zoom zoom".
My '10 with 88K miles is just now ticking at me to adjust its valves.
Hypermileing- Accellerating slowly, coasting to stops. etc. Web search it.
My '10 with 88K miles is just now ticking at me to adjust its valves.
Hypermileing- Accellerating slowly, coasting to stops. etc. Web search it.
#5
In the US the Mazda5 is claimed with only 24 combined MPG. I get that around town, and get 27 or better with mostly highway. But you get significantly less (~18) if you are using your "zoom zoom".
My '10 with 88K miles is just now ticking at me to adjust its valves.
Hypermileing- Accellerating slowly, coasting to stops. etc. Web search it.
My '10 with 88K miles is just now ticking at me to adjust its valves.
Hypermileing- Accellerating slowly, coasting to stops. etc. Web search it.
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