We have a 2010 16' Scamp and tow with a 2013 Kia Sorrento. The Sorrento has a 3500lb tow capacity. We live in Denver, so most of our travels take us into the Rocky Mountains. We've been towing the Scamp with the Sorrento since Feb, 2019, usually about once a month. On our most recent trip 2 weeks ago, we towed up and over Berthod Pass, down through Granby and made our way 5 miles down a dirt road into National Forrest land when our engine oil light came on. Long story short, we camped, relied on the kindness of strangers to get some oil from town, and limped our Sorrento and Scamp back into Granby and to the first mechanic that answered our phone call. The car was profusly leaking oil through most of this. Turns our it's our rear main seal. The mechanic tells us that this is a part failure that he usually only sees in much older vehicles with many more miles than ours (40k). He's under the impression that the Sorrento is underpowered to tow the Scamp and that's the source of the part failure.
Here's the quandry, The Scamp weighs, at most, 2500lbs. The Sorrento is rated at 3500lbs tow capacity. I figured this was plenty of vehicle but now I'm thinking "tow capacity" might be a misleading number and we're considering getting a bigger tow vehicle with more capacity. Any input would be greatly appreciated , especially if you have experience towing in the mountains.
Thanks in advance,