I'm about due for an oil change on my motorhome. It's a 2024 Class C on a Ford E450 Super Duty chassis running the 7.3l "Godzilla" engine. I changed the oil and filter as soon as I bought it with around 1600 miles on it. I changed oil and filter again at 6000 miles with Valvoline Advanced and a Fram Synthetic Endurance filter. I plan on doing a 5000 mile interval for oil/filter changes as the vehicle does sit for a couple months at a time. I thought I was doing the right thing by using the Fram Synthetic Endurance because of the filtering capability, but after reading all the issues with the ripples on the leaf spring plate I'm rethinking everything. I read a number of posts about the Microgard Select filter being a quality filter - I have an O'Reilly's a couple miles away so they're easy to get - but I've also used Mobil 1 filters in the past on my other vehicles and had good luck with them. I've also used Wix XP but have heard nothing good about them recently so they're out. I've read on here about another company building the M1 filters and it sounds like they've improved over the previous manufacturer. To complicate matters when I go on M1's website to search for the correct filter for the E450/7.3 they don't list one. I can cross reference from the Fram and Motorcraft numbers and it comes back as the M1-210A for the cross, but I wasn't sure if there's some reason why Mobil won't list this filter for the E450/7.3. Anyway, I'm leaning towards the Microgard Select as it sounds good on paper and from what I've read here people are very happy with it...right now. I'm looking for a good filter for what amounts to heavy duty use - the motorhome is 32' long and I tow a Jeep Wrangler behind it - but I wasn't sure if the Microgard Select would work for the heavier use conditions. Looking for some guidance from any of you towing or with a motorhome for filter choices. Thanks