Motor oil, What weight? |
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Motor oil, What weight? |
911914 |
Dec 27 2004, 11:33 PM
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#1
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Member Group: Members Posts: 51 Joined: 24-December 04 From: Vancouver, Washington Member No.: 3,334 |
I am sure this has been hashed out here many times before and I don't want to start another oil thread but I be a newbie. Car I just purchased was rebuilt about 20k ago ('74 2.o) and the records show 15-40 weight has been used since rebuild and at all services. Now is this not a heavy diesel weight oil? I use this weight in my BMW 535i as recommended from factory, but a small air cooled VW mill using this heavy weight? Doesn't sound right to me. Clue me in please. Oh, engine is dual Weber's and a Web cam.
Thanks. |
Tom73 |
Dec 29 2004, 09:56 AM
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#2
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Member Group: Members Posts: 180 Joined: 20-September 04 From: Central Texas Member No.: 2,792 |
My understanding has always been that a
10w30 will flow like a 10 weight when the oil is cold and then once the oil is up to temp it will flow like a 30 weight. (same for 15w40 or 20w50 etc etc) So would seem to me you would want a 10 or a 5 to get the oil flowing at start up. That is when the wear is worse and you need to get the oil moving as quickly as possible. Then when the engine warms up the oil will act like as 30 or 40 or what ever is needed in your engine. To me it would sound like you would need a 10w30 or maybe a 10w40. You would not want anything over a 10 for the cold side, then you would want a 30 or 40 for the hot side depending upon your clearances and the wear in your engine. Just my two cents..... tom... |
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