When I bought my Tacoma back in 2011, I think, some came with synthetic and some with regular motor oil. The ones with synthetic recommended 10,000 miles while the ones with regular was 5,000. When I bought my Tundra in 2015, it came with synthetic but the recommended mileage was 5,000 miles. I don't quite understand why, as everyone that I have talked to had no problems with the 10,000 miles oil change. miles
What engines did your 2011 and 2015 models have? My 2013 has the 4.6 L
