Lubricants

Although the new API CJ4 product is fully compatible with the older CI4plus specification, it is never recommended to mix oils of differing performance levels, as it could compromise the performance of the product, this is particularly important with these new products as addition of non CJ4 lubricants could affect the exhaust after treatment life of 2007 vehicles.

TBN is a measure to determine the engine oils ability to withstand attack from corrosive components (Acids) formed by combustion of the diesel, a higher TBN means better protection from corrosion
There are two types of acids that are formed in the combustion of an engine, sulfuric acid from the sulfur in the fuel and nitric acid from the NOX. ULSD has seen a dramatic reduction of sulfur in the fuel, which should result in reduced sulfuric acid; however EGR rates have increased dramatically which will result in higher nitric acid components. The decrease from ULSD is smaller than the increase from EGR, resulting in TBN being as important now as ever.

Supplemental additives can disturb the careful balance of specialist additives that are in a modern lubricant to control deposits, viscosity, oxidation, wear, corrosion and base oils, too much of any of these components can cause a detriment to the performance of the lubricant. The use of any supplemental additives is consequently not recommended.

Where ever possible engine idling should be minimized, as excessive idling can result in dilution of the engine oil with fuel, increased soot generation, and occasionally formation of water condensates. Water and fuel in the engine oil will reduce the effectiveness of the lubricant to lubricate engine parts, and soot will make the oil thick and abrasive. This is on top of the extra amount of gas that is consumed compared with starting and stopping the engine. If heat or cooling of the cab is required consider the use of a stand alone cab heater / cooler.