If the engine does not run long enough to get warm enough to evaporate the water vapor out of the engine, the water vapor builds up. When the engine cools down, the water vapor condensates, and now you have water in your engine. The water mixes with the sulfur in the oil and the partially burnt fuel to create a very corrosive chemical cocktail. To fight this, oil engineers have developed detergent and dispersant additives to fight corrosion. The power of the additives relates to the TBN value of the oil.
A very strong detergent and dispersant package will have a high TBN value, and that signifies an oil that is good for frequent short trip driving. Ok, so why not use a high TBN oil in my race car? Simply put, the harder the engine runs, the less TBN your engine needs. That may seem counter-intuitive, but it actually makes sense when you realize that Detergents and Dispersant compete against the Zinc anti-wear additives and and EP extreme pressure additives your race engine needs. Nobody building a race engine lowers compression ratio, installs lighter springs and a smaller cam to make a production engine into a race motor.
Nope, you do the opposite, and when you do, you increase all the contact pressures in the engine. These anti-wear and EP additives form sacrificial films that protect your race engine from adhesive wear due to the higher loads in a race engine. The Detergents and Dispersants that fight corrosive wear are trying to strip that armor off your engine parts. All of these additives are needed to protect your engine. The key is selecting the right balance for your engine.
While race oils provide more anti-wear and EP additives to fight adhesive wear, the lower level of Detergent and Dispersant require more frequent oil changes to control corrosive wear. If you didn't know that racing engines use a different type of oil than your daily driver, you're not alone. However, there are some very important reasons why these oils exist in different categories.
Although some racing engines may be very similar to the one in your normal car, the conditions they operate under are quite different. These differences in conditions and use are the main reasons you should be sure you're using the correct oil for your vehicle's situation. Failing to do proper research before purchasing oil for your engine can lead to premature wear, damage, and a shorter engine life.
The Most Common Differences Your daily driver is most likely used daily to get you to work and back home with some other stops in between. Typically, most drivers will complete relatively short distance trips at low and manageable speeds. Under these conditions, your engine will heat up and your motor may experience some friction, adding to the heat. Even so, your engine won't necessarily experience too much strain or an overabundance of heat. Your normal engine oil will be in charge of keeping friction down, temperatures manageable, and your engine clean among many other tasks.
On the other hand, your racing engine likely gets more limited use and is reserved for days on the track. Whether you race in long distances around a circular track or in shorter drag races, your engine is put under more intense conditions that require that your oil performs certain tasks that aren't seen on a normal commuter road.
While racing, your engine is more likely to be put under more extreme conditions, and it's probably forced to perform at it's maximum. Unfortunately, your normal street engine oil won't be able to give it the protection it needs.
Luckily, that is what racing engine oil is made for. Whether you're looking for racing oil or standard engine oil, contact Synthetic Oil Direct at to find the perfect synthetic oil for your engine.
It has to have properties such as wear protection, a long oil life, maximum fuel economy, corrosion protection, and oxidation resistance. Race engine oil on the other hand is changed very often, after one or a couple of races. Furthermore, because race engines endure high pressures and loads they need extra anti-wear protection. These are anti-wear additives such as ZDDP Zinc Di-alkyl Di-thio Phosphates which are particularly effective in the protection of the much higher stressed valve-camshaft train.
Friction reducing additives like Molybdenum Di-alkyl Di-Thio Carbamates are often added in an effort to reduce the friction between all the moving engine parts. The normal amount of detergents and dispersants in an oil could compete against these additives that are so crucial for a race engine and you often see a reduction of these with subsequent lower TBN Total Base Number values. However, there are many base oil mixtures possible.
Like race cars are designed with a different purpose in mind than normal cars, the same applies to engine oil.
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