+1 - Ars said exactly what I would have.
I run a 5W30 (or sometimes a 5W40 in the summer) synthetic and stick to the factory interval. The increased cost is offset by fewer oil changes...but the cost of oil is cheap compared to the cost of repairs...
2016 Tundra Crewmax 4WD 1794
2005 MB S600 (90K, Michelin AS3, M1 0W40)
2002 V70-XC (218K, AltiMax RT43, Castrol Edge 0W40)
2002 V70-T5 (189K, IPD bars, Bilsteins, Contis, Mobil 1 0W30)
1932 Packard Sedan (straight 8, dual sidemounts, original paint and interior, Shell Rotella 15W40)