While Changing my oil today, I was looking at the quart, I noticed it said 10W 40. I know what the 10 means but what does the 40 mean?
2007-01-20 16:26:37 · 3 answers · asked by HVAC Man 4 in Cars & Transportation ➔ Maintenance & Repairs
http://www.atis.net/oil_faq.html Scroll down to Section 2, then read down 4 or 5 paragraphs, it's all explained there. I hope this helps.
2007-01-20 16:33:34 · answer #1 · answered by Anonymous · 2⤊ 0⤋
Finish reading it... Its on the back also.
10w 40 Is the Weight of the oil over all and what temp's it covers from the negative (COLD) to HOT...
2007-01-21 00:30:56 · answer #2 · answered by Shattered Moon 3 · 0⤊ 0⤋
10W 40 means the oil has the viscosity of standard 10W oil when cold and the viscosity of 40W oil when hot. This is what multigrade oil means.
2007-01-21 00:29:56 · answer #3 · answered by Anonymous · 1⤊ 0⤋