What does one mean by a "multigrade engine oil 15W 40".What does the terminology stand for.?

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What does one mean by a "multigrade engine oil 15W 40".What does the terminology stand for.?

Can somebody explain in detail. Or refer a good website.

2006-09-19 00:11:30 · 2 answers · asked by MB 2 in Cars & Transportation ➔ Maintenance & Repairs

2 answers

Good explanation at

http://www.jiffylube.com/HowCarsWork/hcw_Understand.aspx?File=ottomotive_understand_oilgrades.htm

2006-09-19 00:17:13 · answer #1 · answered by madjer21755 5 · 0⤊ 0⤋

The correct term is multi-viscosity oil. This oil flows as15 weight oil when cold or in the winter time during startup and flows like 40 weight oil when at operating tempurature.

15 winter-40 weight oil

2006-09-19 10:13:06 · answer #2 · answered by wzzrd 5 · 1⤊ 0⤋