Automotive

Turbo engine gas mileage more sensitive to load?

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  • Feb 18th, 2018 6:21 pm
[OP]
Deal Addict
Jun 14, 2008
3323 posts
2096 upvotes
Montreal

Turbo engine gas mileage more sensitive to load?

Has anybody noticed it? If it has to deal with additional load, be it higher speed or towing, turbo engine will use much more additional fuel than NA engines, either similar powered V6 or even weaker I4.

I've noticed that by going 130 instead of 100, my gas mileage falls off the cliff, like going from 7 to over 10 liters, way more than the 6 banger I had before (which gulps gas either way lol). Other people on the forum also noticed by towing a smaller trailer their gas mileage becomes abysmal, while the weaker NA 4 doesn't drop nearly as much.
4 replies
Deal Guru
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Oct 5, 2008
14264 posts
8367 upvotes
Toronto
Of course, being in boost uses more fuel
Deal Expert
Jan 15, 2006
16450 posts
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Richmond Hill
Turbo motors are horrible on gas when they are under boost.
Deal Expert
Aug 22, 2011
35652 posts
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Center of Universe
While gas mileage suffers, I don't feel that my vehicle is struggling at all (3.5L twinturbo).
If you're towing with a 4banger turbo, you're pretty much at the max.
Deal Expert
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Dec 7, 2012
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GTHA
jzmtl wrote: Has anybody noticed it? If it has to deal with additional load, be it higher speed or towing, turbo engine will use much more additional fuel than NA engines, either similar powered V6 or even weaker I4.

I've noticed that by going 130 instead of 100, my gas mileage falls off the cliff, like going from 7 to over 10 liters, way more than the 6 banger I had before (which gulps gas either way lol). Other people on the forum also noticed by towing a smaller trailer their gas mileage becomes abysmal, while the weaker NA 4 doesn't drop nearly as much.
Consumer Reports did research on this in 2013

Small turbo engines don't deliver on mpg claims
In the quest for better fuel economy, Ford is offering small turbocharged engines in the Ford Fusion and Ford Escape. And Chevy put a turbo engine in its Chevrolet Cruze. But Consumer Reports' tests find those small engines come up short.




Consumer Reports Tests Find Many Small Turbo Engines Fall Short On Fuel Economy
Fuel Economy, Acceleration No Better than in Conventional Powertrains
https://www.consumerreports.org/media-r ... y-entry-2/

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