Quote:
Ozstatman wrote:
"you should use detergent oil"
I'd think that should have a caveat attached of only if the engine has been recently cleaned of sludge. If there's a sludge build up in an engine detergent oil could loosen it and create a problem by blocking the oil pickup causing oil starvation. If I remember rightly, this happened to another poster here recently?
Ozstatman is correct. If the engine has been running non-detergent oil (if the oil you've just drained from the pan is non-detergent oil) you will need to inspect and clean sludge if present.
The assumption underlying my recomendation is that since detergent oil came out 50+ years ago, the pan has probably been off more than once and the engine has probably been running on detergent oil most of its life.
But that's a big assumption, as Ozstatman points out.
Perhaps a better way to phrase it would be, "if you've been running non-detergent oil, don't switch without cleaning out the sludge. If you've been running detergent oil, keep using it."
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