I sold my Gen3 4Runner at 328,272 (that I bought at 21,323 miles) and bought a used 2018. I towed often in the 1998 and my average interval was 6138 miles, that's 47 oil changes. The last I knew, the Gen3 is still on the road. The maintenance light on the Gen5 comes on at about 5,000 miles, and...