What is Semi-Synthetic Oil?

We know it can be confusing with all of the different types and brands when it comes to motor oil. Our certified technicians recommend checking your owner’s manual or stopping in to see what type of oil your vehicle requires. There are three main types of oil in a traditional gas-powered vehicle: conventional, synthetic, and semi-synthetic. Conventional oil, or standard oil, is refined from petroleum and has few additives. It is typically the cheapest option but requires more frequent replacement. Synthetic oil is manufactured to exhibit beneficial properties for your engine. These include increased viscosity and lubrication, as well as resistance to thermal breakdown. It is typically the more expensive option but requires less frequent changes. Semi-synthetic oil is a mixture or blend of conventional and full-synthetic oils. It is typically at least 70% conventional oil and no more than 30% synthetic oil. This is enough to impart beneficial qualities, such as resistance to oxidation while keeping the price down.

How Frequently Does Semi-Synthetic Oil Need to Be Changed?

Unfortunately, motor oil of any type will deteriorate over time and with normal use. There is no way to avoid this, so the oil will need to be changed periodically. Our certified Nissan technicians encourage our customers to check their owner’s manual for their specific model and oil type to determine the frequency with which you should have your oil changed. Typically with semi-synthetic oil, this will be approximately every 5,000 miles, or every six months, whichever happens first. You may need to have your oil changed more frequently than this, depending on the environment in which you typically drive, whether you carry or tow heavy loads, and whether your vehicle has accrued high mileage. Be sure you don’t put off having your oil changed, as this can lead to a buildup of contaminants and debris, which can damage your engine’s metallic components.

Indicators That it’s Time to Have Your Nissan’s Oil Changed

If you lost track of your oil change schedule, and aren’t sure whether you are due for a semi-synthetic oil change service, book an appointment if you have noticed one or more of the following signs of degraded motor oil:

• Delayed start of Nissan
• Abnormal ticking noises
• Excessive exhaust
• Diminished fluid level
• Check engine light is on
• Vehicle shakes while idling
• Dark, dirty oil
• Noticeable oil odor within your passenger compartment