7.3 Ford powered motor home oil Qs

On the free way I run about 60-65 mph and the engine is below 3k in this scenario, on the the grades, depending on steepness it'll begin kicking down as needed and I use foot english to maintain right around 4000 rpm. Some grades like on interstate 90 these passes will have me down to 3rd or even 2nd gear pulling for some miles. I could easily push the engine well into the high 4ks but I prefer not to.
That sounds good. The torque curve is very flat and there is a slight peak near 4000 rpm.
 
I know this is a contrarian thought but read the book, follow directions. Motorcraft 5W-30 will probably do just fine. I second the idea of taking used oil samples at every oil change. This will show you wear metals and wear trends as well as possible fuel dilution or other contamination. I have 42,000 miles on my V-10, run 5W-30 semi synthetic on a 5,000 mi maximum interval (1 year, usually about 4500 miles) and everything looks good.
 
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If you want the absolute best protection, might be wise to reach out to @High Performance Lubricants and see what Dave recommends, I assume it might be a 5W-40 Euro lube.
Dave maintains that the SuperCar line is their pinnacle of protection for road going cars. There may be HPL oils may last longer or do specific things slightly better, but overall SuperCar is the best choice.
 
2023 ??? Isn't motor still under factory warranty?? if yes, then I would make sure 100% with ford or your local dealer that you wont void warranty by running just any oil in it
 
2023 ??? Isn't motor still under factory warranty?? if yes, then I would make sure 100% with ford or your local dealer that you wont void warranty by running just any oil in it
Warranty is predicated on engine damage, not a grade nor a specification. This oil will not damage the engine.
 
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i will also recommend some HPL lube. any of their 5w-40 is what i would look into. could probably do 10-15k intervals on normal old PCEO 5w-40 to make it economic.
 
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