Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Oil Container Labels
The American Petroleum Institute (API) logo is a circle divided into three sections. The top half of the circle is the "API Service" section, which is used to indicate the quality of the oil. The lower half of the circle is the "Energy Conservation" section, which indicates the oil's degree of fuel efficiency. The center of the circle is the "Viscosity" section, which is used to indicate the viscosity of the oil. The oil container should have a "Starburst" label instead of the doughnut shaped symbol.
Multigrade Oils - These oils make seasonal changing unnecessary. They contain viscosity-index improvers that enable each oil to exhibit suitable flow properties at both ends of the thermometer.
They have labels like SAE 5W-30 or 10W-30 or 15W-40. Some may have labels like SAE 5W-10W-20W-30, in this case, just ignore the middle numbers and read the oil as SAE 5W-30.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.