Choosing Oil

  • Choosing Oil

    What Type Of Oil Do I Use?

    The answer to this question is in your owner’s manual under the maintenance schedule. The car maker outlines what weight (viscosity) to use. If it says 5W20, use it. Car makers make engine oil recommendations based on extensive lab testing, road testing, and research done in conjunction with petroleum companies. You can rely on the recommendation because it’s based on a lot of research.

    Should I Change The Weight Of The Oil Based On Time Of Year/Temperature?

    No. Multi-viscosity oils are designed to adjust their rate of flow (weight) based on outside and inside engine operating temperatures. When you read an oilcan that has a viscosity rating of 5W20 it means that the winter flow rate of the oil is 5 (thinner) than the summer flow rate (thicker). Multi-viscosity oils thicken up in the summer when the temps are hot and oil tends to thin out. When it gets cold they thin out in order to maintain optimum flow rate in all temperatures.

    What About Synthetic Oil? Can I Use It?

    In most cases you can switch over to synthetic oil. However, consult your owner’s manual before switching to make sure there are no caveats. I like synthetic oil because it is chemically fortified to withstand the rigors of the internal combustion engine environment. While it is not impervious to, it is highly resistant to viscosity breakdown from heat, friction, and chemical contamination. Synthetic oil flows better in winter and provides superior lubrication and protection in the summer when most oils break down under intense heat. If you switch over, just make sure you use the viscosity recommended by your car maker.

    How Often Should I Change The Oil?

    When using good quality synthetic oil, change it every 5 – 7 thousand miles or six months, whichever comes first; and make sure to change the filter. When using petroleum-based oil, change it every 3 – 5 thousand miles or three months. As with synthetic, change the oil filter with a high quality filter every time you change the oil. Why the longer drain intervals with synthetic oil? It’s tougher; therefore you can go longer between drain intervals. Based on my research of synthetic engine oil, AMSOIL is number one and Mobil One is number two.

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