Late model 6.0L MPI vs. 5.3L GDI Motors

[MC25]

For the 2018 and 2019 XT22 & XT23 series boats, the engine options were (do I have this right?):

5000 = 5.7L MPI 320hp

5500 = 5.3L GDI 365hp

6000 = 6.2L GDI 430hp

Meaning the 6.0L MPI was not offered in those years and now in 2020, essentially it replaces the 5.7L MPI motor (the old 5000)?

This is correct. Pretty sure you could do the 7000 maybe?

[waterskier360]

I have a 2020 Nxt20 coming any idea on 5.7 vs 6.0 mpi mpg ,emissions , etc ?

[John Johnson]

None of these motors are obnoxiously loud.

[MC25]

None of these motors are obnoxiously loud.

They’re definitely not Indmar raptor loud

[tommydbouy]

Anybody know the weight difference of the two motors?

[Tookeymonster]

I was wondering about that. You have a rough guestimate how much more quiet the 5.3GDI is over the 6.0 and 5.7MCX? I always heard that Fresh Air Exhaust was the best stereo upgrade for the money.

At Idle you can't hear it, sometime I find myself checking rpm's to see if its running lol.

[hyman989]

I’m a big fan of the FAE but the transom straps on an XT22 might make that difficult.


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I heard a FAE will void the warranty if you install one. You could move the straps to hook in a different spot on the trailer if you needed one

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[MC25]

Honestly, an FAE on the 5.3 isn’t necessary

[MasterCraft Ranger]

I have a 2020 Nxt20 coming any idea on 5.7 vs 6.0 mpi mpg ,emissions , etc ?

The 6.0 won’t be working too hard in an NXT20 so the economy should liveable. I believe it is “5 Star” rated for emissions which hopefully means you won’t be sucking down too much CO.


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[MasterCraft Ranger]

I heard a FAE will void the warranty if you install one. You could move the straps to hook in a different spot on the trailer if you needed one

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Yeah, the “void your warranty” comment always seems to come up with the FAE discussion. I’ve never seen anyone posted an actual document that states it however. Malibu and Nautique both have “surf pipes” on their boats right out of the factory for what it’s worth.


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[sand2snow22]

I like the 6.0L over the 5.3L, noticeably more power for me. Not much but if you drive them back to back you can tell. 5.3L wins for emissions and being quieter and antifreeze cooling.

[MC25]

I like the 6.0L over the 5.3L, noticeably more power for me. Not much but if you drive them back to back you can tell. 5.3L wins for emissions and being quieter and antifreeze cooling.

You can seriously notice less than 10 horsepower? Seriously doubt that

[waterskier360]

The 6.0 won’t be working too hard in an NXT20 so the economy should liveable. I believe it is “5 Star” rated for emissions which hopefully means you won’t be sucking down too much CO.


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I should be doing a live test here soon if it will ever stop raining and putting debris in the lakes. Fuel economy on both my past 5.7's was just fine , I'm assuming the 6.0 will be comparable. X25 and X22 were both fine with the 5.7, we are always lightly loaded with 1 to 3 in the boat, can't comment on full ballast and 6 or 7 adults as we have never done that. 20 footer should be a rocket with the 6.0 motor.

[sand2snow22]

You can seriously notice less than 10 horsepower? Seriously doubt that

Same boat back to back.

[moosehead]

I would gladly take the performance of my 6.0L with better emissions, higher fuel efficiency, and lower noise.

The new GDI motors were noticeably quiet, plus the newer/deeper bilges seemed to deaden noise as well.