The shortest ever was at about 1,000 miles when I drove through a severe sand and dust storm and did not want to take chances. That was with a 1978 Toyota Corolla.
The longest was 11,000 miles on Mobil 1 15W-50 Extended Performance with The Beast.
The longest was 11,000 miles on Mobil 1 15W-50 Extended Performance with The Beast.