128 Service and maintenanceAdditional servicingAdditional operations +Additional operations are not requiredevery service but can be performed inconjunction with a regular service.Time allowances for such work arenot included in the scope of regularservices and will be charged foradditionally. It is more economic ifthese operations are performed aspart of a scheduled service thanhaving them performed separately.Extreme operating conditions oExtreme operating conditions aregiven when at least one of thefollowing occurs frequently:■ Cold starts■ Stop and go■ Trailer towing■ Gradients and/or high altitudes■ Poor road surfaces■ Sand and dust■ Extreme temperature fluctuationsPolice vehicles, taxis and drivingschool vehicles are also classified asoperating under extreme conditions.Under extreme operating conditions,it may be necessary to have certainscheduled service work done morefrequently than the scheduledintervals.Seek technical advice on theservicing requirements dependent onthe specific operating conditions.Recommended fluids,lubricants and partsRecommended fluids andlubricantsOnly use products that have beentested and approved. Damageresulting from the use of non-approved materials will not becovered by the warranty.9 WarningOperating materials arehazardous and could bepoisonous. Handle with care. Payattention to information given onthe containers.Engine oilEngine oil is identified by its qualityand also its viscosity. Quality is moreimportant than viscosity whenselecting which engine oil to use.Engine oil qualityGM-LL-A-025 = Petrol enginesGM-LL-B-025 = Diesel engines
