21 escape 211,000 miles

I agree with 15K after a UOA. Also, isn't Amsoil XL their lowest tier oil? I'd probably use Mobil1 EP or Castrol Gold Edge for probably the same cost as that Amsoil.
 
300 Highway miles a day, 5 days a week driving? Mobil 1 5-30 15K or a boost on the Amsoil and 20k or if me, I'd give the HPL a shot at 25k with a UOA!!
 
I agree with 15K after a UOA. Also, isn't Amsoil XL their lowest tier oil? I'd probably use Mobil1 EP or Castrol Gold Edge for probably the same cost as that Amsoil.
It's their "mid grade" on par with most off the shelf extended drains. Their OE is the next lowest tier and recommends following OLM from manufacturers.
 
300 miles a day?? Wow. And I imagine it gets driven a little on the weekends too…so let’s say…1,6000 miles a week, 6,400ish a month. Yeah, I’d just go with Amsoil Signature Series and double that interval you’re doing to 14,000-15,000 miles (with an analysis afterwards). I imagine you’re using the vehicle for work, the expense of the analysis and expensive oil will be a right off anyway. Or try what HPL has to offer - you’re the perfect candidate for a boutique oil with the amount of driving you do.
 
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