Why am I getting only 20mpg on my honda civic 2012? It's extremely low and how can I fix it?
Why am I getting only 20mpg on my honda civic 2012? It's extremely low and how can I fix it? - 1
When was the last complete tune up performed? What psi are the tires at? Do you drive @ 55 mph on a highway? These are things to ask yourself first
Start with adjusting the valves. All Honda's have a common problem with valves getting tight and they need to be adjusted every 60.000 miles.
For radically low fuel economy, assuming it is not all very short trips, I check the thermostat first. If it fails in the open position the engine will never warm up and fuel economy can be reduced by half.
The basic test is easy enough - start the engine, open the hood, and feel the upper radiator hose as the engine warms up. The center of it should barely get warm until the engine comes up to operating temperature, then quickly become hot as the thermostat opens. If the hose gradually heats up as the engine does, replace the thermostat.
I had a 1970 Volvo that had a 50% drop in fuel economy one winter. I removed the thermostat and found it hanging open a bit more than a millimeter. Replacing the thermostat fixed the fuel economy problem.
Try getting the tire pressure right before you head to the shop where you'll spend $100 for an OBD2 code check before anything. Low tires have higher rolling resistance and rob fuel economy. Buy yourself a $30 OBD code reader and see what trouble codes the car has. That's better than guessing, since it will name any culprits.
Are you doing mostly city driving?
If so, a 2012 Civic with a 2.4 engine is only rated at 22 mpg for city driving. If that's the case, then your actual 20 mpg would be pretty normal.
Type of driving and where you drive make a huge difference. Maybe 20% savings just by driving VERU carefully. If you spend ANY time stuck in traffic and waiting at lights, your fuel economy will totally suck, and hills and winding roads are other killers.
Try a short road trip, a couple of hours cruising @60 mph and measure your economy over that. Bet you find it's well over 30 unless you have an actual fault.
If those don't apply, then check the thermostat, get a tune up, make sure your tyre pressure is correct. A combination of those things will cut back your economy too.
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