Valvoline Cummins Ltd. Offers Tractor plus Diesel Engine Oil. Tractor Plus Diesel Engine Oil is a multi grade diesel engine oil specially formulated for tractors operating under extreme climate, moist and dusty conditions. It also performs well in tractors running at varying loads and speeds for long duration. The Tractor Plus Diesel Engine Oil is recommended for all Tractors of M and M, Escorts, Eicher, TAFE, HMT, New Holland, Sonalika, Swaraj and all other makes of tractors. Tractor Plus being CF grade oil is ideal for high performance, high horse power tractors. It is available 1, 7 Ltrs and 10 Ltrs packs. The Tractor Plus Diesel Engine Oil has these SAE 20W 40, API CF-4/SF technical specification.