Quote:
rblum wrote:
Don't understand why anyone would still want to use non-detergent oil??
I believe it's what Mr. Bumble said about "loosening up the crud." Non-detergent pretty much lets sleeping crud lie, especially in the bottom of the pan. Detergents can loosen it up and get it circulating in the oil. A big enough chunk could get into an oil line and plug it.
A car that's NEVER had detergent oil and never had a rebuild or at least an oil pan cleaning should probably stay on a diet of non-detergent oil, just to keep from stirring things up.
However, I have been cautiously using detergent oil in my '54 327, and changing it FREQUENTLY, thus doing a slow cleaning. (I do not know the repair history of the engine or the condition of the bottom of the oil pan.) My engine has NO oil filter, and so the screen on the oil pickup gets the big pieces. It's also liable to get fouled, and I want to try to give it a good washing.
Last time I changed oil, it came out black after less than 500 miles. I also had Marvel Mystery oil in it and a can of STP (!). No bits and pieces were found in the oil or the drip pan screen (which is very coarse and more of a splash guard than a screen).
One thing I thought of afterwards is, next time I change the oil, I'm going to try to remember to put a piece of metal window screen over the drip pan screen and see what I catch in it.
The next oil change will probably be at about 1000 mi, unless I go on a long trip like I plan to in late summer. This would entail about 3000 road mi., and who wants to change oil on a trip? But I pull the dipstick frequently, and when it starts to get black, I'll change it no matter what.
ANOTHER good reason to check the oil regularly. Look at the dipstic to see how black the oil is, and give it a sniff for gasoline or, God forbid, antifreeze.
This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=147230