If the F-150 can have the 3.2L Powerstroke (Duratorq in Europe IIRC) 5 cylinder diesel engine, it will be a SERIOUS competition against the RAM 1500 with the 3.0L EcoDiesel V6 and GM's 4 cylinder Duramax in their Colorado-Canyon twins.
Methinks you've got it backwards. If sales numbers mean anything, both of those trucks are only hoping
to be serious competitors of the gas EcoBoost F150.
Let's compare a few specs from MFR websites....
EcoDiesel 240HP / 420 LB-FT
EcoBoost 365HP / 420 LB-FT
EcoDiesel 21 City / 29 Hwy (4x2)
EcoBoost 17 City / 24 Hwy (4x2)
EcoDiesel Payload max 1,600 LB
EcoBoost Payload max 3,270 LB
EcoDiesel Trailer max 9,210 LB
EcoBoost Trailer max 12,200 LB
EcoDiesel DEF required
EcoBoost No DEF
From Owners manuals and market research ....
EcoDiesel - Oil & filter cost substantial due to limited products meeting warranty requirements
EcoBoost - Wide options for oil meeting warranty specs; low-cost filters
From AAA current US average ....
I'm a long-time 150/1500 series*
owner, use 'em for farm/ranch work and trailer towing (not for 'stylin') and keep 'em a long time (10+ years, well over 100k miles) .... darned if I can see anything that will draw me to a diesel when I look at things overall.
*Don't confuse this with 250/2500 - 350/3500 series trucks .... that's a different thing entirely.
As far as the 'new aluminum F150' ..... here in Texas as soon as they hit the showroom sales continued just the same as the 'old steel' F150. In other words, they're everywhere in big numbers.