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. |
type11969 |
Dec 29 2004, 10:19 AM
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#2
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Senior Member Group: Members Posts: 1,231 Joined: 2-December 03 From: Collingswood, NJ Member No.: 1,410 Region Association: North East States |
yeah, my understanding is the same as yours Tom. I figure that as long as you don't have a pressure problem, use a thinner oil to get it where it needs to be sooner at startup, instead of just relying on whatever residual film is on the parts from the last time the engine was run. And with the oil tech of today, the oil can have a stable broader range than when these cars were made, so you can have you cake and eat it too with a thin oil at start up, and a thicker once warm.
Take a look at the passages in the case that the oil has to go through and pour out some 20w50 on a cold day. If that doesn't convince you that a thinner oil might be better . . . Well you certainly won't have a pressure problem during cold starting, but ask yourself if you really think that oil is going to make it anywhere quickly. Just my .02. |
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