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1926 DB Oil Question


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The old rule of thumb was that if the engine had been rebuilt then you should use detergent oil. If it wasw an old engine use nondetergent oil. I have seen several studies that indicate that detergent oil does not remove the sludge and put it into the oil but I still follow the old advice.

Lots of luck, Jan <img src="/ubbthreads/images/icons/tongue.gif" alt="" />

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Just another opinion. I use non-detergent in my rebuilt 1928 Dodge Brothers motor. Since the detergent tends to break up the sludge and keeps it moving around so the oil filter can catch it, and since the older Dodge Brothers do not have oil filters, I would rather have the sludge eventually settle to the bottom of the oil pan when the car cools down. Regards, Lee

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The only problem is the sludge is also setteling in oil gallies and other places you do not want it. I will a agree it does not sound good to have the dirt suspended and carried around the system. It sounds like either way has its drawbacks. I run detergent oils, rebiult engine or not.

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Let me add to my previous post to say there are many factors one should take in to account when determining what type oil. If you have an early engine which has babbet bearings and loose fitting then the engine can take some dirt. The hard material will inbed it self in the babbet and not do any damage. If you have tight clearance and hard or shell bearings they are less forgiving and you want to trap the material or clean out the system prior to use. If you have an oil filter you want to check it frequently and make sure it does not overload. I make it a point to clean and flush the system every 500 miles. It is cheap insurance and keeps the engine running. The other thing people should do is put an air cleaner on their engine. This is where a lot of grit and dirt comes from. A dry air for tractors works well on most early cars. Hope this helps

Jan <img src="/ubbthreads/images/icons/grin.gif" alt="" />

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