![]() ![]() Seals can actually last longer with synthetic oil. No special preparation is necessary when switching from conventional motor oil to synthetic or from synthetic back to regular oil. Myth: I need to flush my engine before switching to synthetic oil. If you plan on putting a lot of miles on it before selling. If you do a lot of high speed driving or have a high performance car. The heat often bakes and carbonizes and breaks down regular mineral oil also, which can cause premature engine wear or failure.Īny car that has Direct Fuel Injection, found on some newer cars the high pressure fuel pump runs off a camshaft lobe which has a high incidence of wear because of the high loads. The high heat conditions inside the turbo can cause mineral oil to sheer off of the bearings and cause premature turbo failure. Many newer cars today recommend or require synthetic oil because of tighter engine tolerances and lighter oils, always use synthetic when the manufacture recommends it.Īlways use synthetic oil if your car has a turbocharger. We recommend replacing synthetic oil every 6,000 - 8,000 miles as opposed to 3,000 to 4,000 for regular oil. However, if time constraints cause you to go over your normal service interval, synthetic oil will be in much better physical condition than mineral-based oil would be at that same mileage/time duration. Wayne's Garage does not recommend extending oil change intervals as much as a few of the synthetic oil manufactures do because of outside contaminates such as moisture, metal and particulates. Sometimes piston/ring temperatures can rise to over 500 degrees under loads. Regular oil starts to burn between 350 - 450 degrees F, While synthetic oil can continue to function at over 500 degrees. Many manufactures are going to synthetic oils on new cars because of the improved mileage, better lubrication for the tighter tolerances in the new engines and because of their extended oil change intervals. The higher initial cost can be justified over the long run by better fuel economy, longer engine life and reduced maintenance costs. Some people question the economics of switching to the higher priced lube. Unfortunately, synthetic motor oil costs more than conventional motor oil because it is more expensive to manufacture. This means that the short trip to the store and back or a lot of city driving in the winter does not accumulate sludge in the engine as fast and lubrication efficiency is maintained. ![]() Synthetics don't break down or sludge up as fast as ordinary mineral based oils do. The lower evaporation rate means less oil consumption between changes. ![]() A good synthetic will lose only about four percent of its weight when run at 400 degrees for six hours, compared to a 30% loss for a conventional petroleum based oil. Synthetic motor oils experience less "boil off" than conventional motor oils. This helps synthetic motor oil maintain its viscosity grade, enabling it to offer better engine protection and withstand more extreme engine conditions. Full synthetic motor oils resist shear under heavy loads better than conventional oils. As motor oil travels through the engine, some of the additives can be sheared, literally cut in half, by high-speed engine parts, thinning the oil. This is especially important with many of today's overhead camshaft engines. This makes for easier cold starts and provides faster upper valve train lubrication during the first critical moments when most engine wear occurs. Synthetics flow freely at subzero temperatures, pouring easily at -40 or -50 degrees F. This makes it well suited for vehicles that are operated in hot climates as well as heavy-duty, turbocharged or hard-use applications. or higher (some as much as 700 degrees F). The upper limit for most mineral-based oils is about 250 to 300 degrees F. Synthetics can safely handle higher operating temperatures without oxidizing (burning) or breaking down. The special manufacturing process results in lubricants that outperform ordinary motor oils in virtually every aspect: Unlike conventional motor oils that are refined and distilled from crude oil, synthetics are manmade lubricants created from organic esters and other synthesized hydrocarbons. Synthetic Oils: What are they and are they worth it? ![]()
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