Did catch can just increase MPG?

RoadKing · Nov 10, 2013

Last two week the 130 mile each way trip I have made I averaged 19.6 mpg. I installed a catch can and this trip the mpg was 20.3. Truck has near 3k miles, maybe it just bereaking in more. Like tha catch can!

-Arana- · Nov 10, 2013

I am sure it's your style of driving my 2012 gets 22.5-23 mpg on the highway and that's averaging 75-85 mph on 24s

Arctic-Rodz · Nov 10, 2013

no, its not the catch can. it just keeps crap from going back into your throttle body/intake but it does nothing for power/mpg.

DanielSix26 · Nov 10, 2013

When my truck was new I was getting 14 mpg. As it broke in that went to 16.5. Most likely just breaking in.

JohnnyDollar · Nov 10, 2013

Arctic-Rodz said:
no, its not the catch can. it just keeps crap from going back into your throttle body/intake but it does nothing for power/mpg.

I have read this and tend to agree,

however,

just like the OP, as soon as I installed the Catch Can,
I noticed an increase of .4 MPG on a 250mi trip up IH35 which we have made several times.

Coincidence? Maybe.

But we showed the increase both coming and going on that trip and I will be watching the mileage next time we go.

RoadKing · Nov 10, 2013

I actually thought the oil in the return air contributed to lowering the octane as the oily air mixed with fuel which is why I got the can, I think. ha ha

JohnnyDollar · Nov 10, 2013

I have been wondering if the recommended 89 octane fuel is simply to compensate for the lowering of the octane by the oil being blown into the intake.

Lhemi · Nov 10, 2013

I've always ran 91 and 93 when I go to Texas. I've got my BD set on premium, do I have to pay for 91 or can I drop down to 89 with the same performance?

JohnnyDollar · Nov 10, 2013

Lhemi said:
I've always ran 91 and 93 when I go to Texas. I've got my BD set on premium, do I have to pay for 91 or can I drop down to 89 with the same performance?

I do not have a tuner.

I noticed no difference between 87 and 89 octane, so I simply run 87 octane, no knocking yet.

I have a friend that is convinced that this coming summer, especially when towing our boat, I will need to switch to 89 to avoid knocking.

Alfonsio · Nov 10, 2013

JohnnyDollar said:
I do not have a tuner.

I noticed no difference between 87 and 89 octane, so I simply run 87 octane, no knocking yet.

I have a friend that is convinced that this coming summer, especially when towing our boat, I will need to switch to 89 to avoid knocking.

Same here. I have a catch can and run 87 without any knocking. You may be on to something as your theory makes sense.

Arctic-Rodz · Nov 10, 2013

I notice an increase of about 1mpg when I go from 87 to 93 Octane and power difference is noticeable.

Stock tune

Did catch can just increase MPG?

RoadKing

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-Arana-

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Arctic-Rodz

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DanielSix26

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JohnnyDollar

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RoadKing

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JohnnyDollar

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Lhemi

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JohnnyDollar

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Alfonsio

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Arctic-Rodz

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