Mobil 1 44986 5W-40 Turbo Diesel Truck Synthetic Motor Oil - 1 Quart (Pack of 6) Exceptional resistance to high-temperature varnish and low-temperature sludge deposits to help keep engines clean Outstanding wear protection Its wide viscosity range provides outstanding protection consistent with an SAE 40 grade oil at high temperatures, combined with the easy cold-start performance of a 5W rated oil Excellent high- and low-temperature performance Pours at temperatures as low as -53F and protects at oil temperatures as high as 400F Improved protection against sludge and harmful deposits Excellent fuel econcomy benefits