4000km / 2400miles - that's what, about 9-12 'fillups'? Not much yet and of course comparing tank-to-tank mileage is very problematic given fillup level variations, and trip variables.
We'll assume you're using fillup data to arrive at mileages, not the 'car computer' (my per-fillup data since new spreadsheet shows the car avg mileage per tank display has erred from -5% to +11% compared to calculated mileage over 128 fillups). The point being, it's very hard to draw sensible conclusions about mileage looking at per-tank data .... long-term trends are much more valid/useful, and 4000km is on the fringe of a useful data set for that IMHO). In your case, if you continue to have a mix of significant towing (1/3 is that) mixed in with your non-towing miles, it'll be very hard to ever draw any meaningful conclusions about 'potential problems' using mileage as an indicator.
A thought specific to your situation based on info in this and other posts ... considering that 1/3 of your 'miles' is with your two pop-up trailers and a family of four is a fair amount of extra load/drag when towing .... not saying that's a problem but it may well have caused your car's adaptive learning strategy (shift strategy, etc.) to be 'hunting' a bit and that could affect the mileage during, between and after towing trips. That could certainly affect mileage even after towing trips are done, it takes the strategy awhile to adapt to changed situations.
If you want to experiment with that, the 'learned strategy' is in volatile RAM and can be cleared to baseline by disconnecting your negative battery cable at the charging post and leaving it off for a few (10+/-) minutes. Note that you'll 'lose' phone-parings and maybe one-tough window limits and some stored NAV data if you do that, so those things will need to be re-established. The car will then re-learn the strategy based on driving after the 'purge', and will again continue to 'adapt' over time both with and without the trailer load.
We also note that your 'new' trailer is a bit heavier and wider than the 'old' one, and all those little factors add-up.
I recall reading that perhaps you were changing fuel along the way, too (neat that you have some high-octane/low ethanol choices in BC that we don't have in TX) ... if you've been 'shopping' fuel for economy/power reasons or whatever, that can affect the mileage too, of course. If you're like me you don't always find your 'preferred fuel' when travelling, and that likely has some affect on mileage.
Bottom line, IMHO there's no basis for thinking there's anything 'wrong' with your car, barring any other indication of a problem. IMHO you're just getting the mileage that your driving dictates the engine can deliver based on the power demands you place on it. Keep driving and enjoy your Escape and trailer!
'14 Escape SE 2.0 FWD (25 Sep 13 build); 201A SE Convenience Package; Power Liftgate; Leather Comfort Package; Oxford White on Med Light Stone Leather (SYNC 2 w/8" MFT screen)
I love my hard-working '05 F-150 XLT 5.4 V8 trailer-towing truck, too !
Help us help you - what is your year, engine, drivetrain, trim and SYNC version?
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.