Admissible values of the fuel and energy indicators automotive diesel engines:  By the method of Professor Malina V.M. [1, 2] for the effective power can be aken:  Ne = (0,96-1,05)Ne nom   (1)  for new and refurbished diesel engines with a free inlet, Ne = (0,93-1,05)Ne nom and Ne = (0,92-1,05)Nenom  (2, 3) for new and refurbished diesel engines with turbocharging. Similarly on specific ge and full G fuel consumption [2]:  ge = 1,065genom; Gt = 1,065genom•Nеfact when the Nеfact< a Nenom and Gt = 1,065Gtnom when Nеfact ≥ Nenom(4-6).  A residual resource of cylinders (T) is offered [2] to determine the schedule (Fig. 1) Figure 1 - To the remaining life of the cylinder for vacu-um Po, kPa, and compression of the Pк, MPa: T=Tcontr(L_AC/L_OA), where Tcontr-life engines; L_AC- line length, from point A point of control to the point C with the ultimate state; L_ОA is the same, from the point O for nominal status to the point A at moment control.  According to the norms of waste oils to repair cylin-ders, if its value is commensurate with the losses from excessive oil, fuel, from the reduction of productivity machine (usually max burning loss oil in diesel 3-5 %). Limit oil pressure heated ice on pmin 0,2 kgf/cm2 (0.02 MPa).  Of means of control for enterprises teaser-vis agriculture there is quite simple.     Of the methods of diagnostics it is expedient to raise the status of organoleptic, i.e. they often quickly and reliably detected and the status and causes of faults. Here the "drop test" oils [2], the smoke exhaust - visually, which should not be excessive, without grains soot, and idling - not noticeable.   The task diagnosticians agricultural machines: not only to determine the status, identify and resolve problems, but also to eliminate their causes, causes of abnormal wear and implement measures to vsestoronne the protection of diesel engines from pollution and water contamination. Their task is to carry out "the indiscriminate repair" non-emergency units tribological additives in oils.