Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
Jayco RV Owners Forum

Thread Tools Search this Thread Display Modes
Old 01-15-2021, 12:48 PM   #1
Senior Member
RogerR's Avatar
Join Date: Jul 2016
Location: Mapleton
Posts: 3,811
Real world Jeep V8 mileage

I am seriously looking to upgrade from the V6 3.6 liter in my 14 Jeep Grand to an 18 or 19 with the V8 5.7L. Has anyone any experience in the mileage difference between these two engines? I have seen a low of 9.5 to 15 depending on speeds, wind, and mountains with the 3.6. I know the V8 uses more gas day to day but maybe not bad during towing.

The 3.6 does the job fine but a little more for passing, merging and mountains would be nice.
2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy

Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6
RogerR is offline   Reply With Quote
Old 01-16-2021, 12:15 AM   #2
Senior Member
ttavasc's Avatar
Join Date: Mar 2015
Location: Auburn, WA
Posts: 1,823
We towed our 195RB for 5 years with a RAM 1500 with the 5.7L v8 and the 3.21 gears. One trip we did frequently was from Seattle to Kanab, UT. There was a good mix of mountain passes and flats and overall the 5.7L would turn in an average of around 10.5-11 for that trip. With a good tail wind on the flat we could see upwards of 14+ - a stiff headwind could take it down in the low 8's. Unloaded around town I would see ~13.5-14 and empty highway I hit 19.7 one time. In my opinion the better towing experience would be worth the potential trade-off of slightly less mpg.
TT: 2019 ORV Timber Ridge 23DBS, Blue Ox SwayPro 15K/1500
TV: 2019 Ford F-250 XLT SuperCab LB, 6.2L, 4.30/e-locker, 4x4, 164" WB, 3216 payload
TV: 2014 RAM 1500 Big Horn CC (Traded in)
TT: 2015 Jay Flight SLX 195RB Baja Edition, Andersen No-Sway (Traded in)
ttavasc is offline   Reply With Quote
Old 01-16-2021, 10:57 AM   #3
Senior Member
Join Date: Aug 2013
Location: Utah
Posts: 891
Speed and wind will be the dominant factors with your mileage no matter what size engine you have.
2014 Ram 2500 Mega Cab Laramie 4x4 6.4L HEMI 4.10s with antispin
2014 Jayco Jay Flight Swift 287BHBE
Equal-i-zer 90-00-1200(new 90-02-4900 shank)
2x Honda 2K
NewBlackDak is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

This website is not affiliated with or endorsed by Jayco, Inc. or any of its affiliates. This is an independent, unofficial site.

All times are GMT -6. The time now is 08:04 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.