The job of good engine oils are to remove sludges from the engine and during regular oil change it is always recommended to drain the oil when engine has just been shut off.
The lesser sludge buildup the cleaner the engine will be and the longer it will last. Shorter oil change intervals would keep the engine clean as the longer oil stays in the engine, the more sludge it is going to collect.
I change my engine oil every 3000 miles with regular grade engine oil and at 100 k miles, you can see the valve trains are as good as new. The drained oil would only look slightly brown.
How do you know the additive is compatible with the oil you are using?
How would you know the additive is dissolving the sludge and not pulling them down in chunks?
When sludge build up, they would stick anywhere in laters which would thicken over time. Any external factor can trigger these to collapse and be drained into the oil sump. If they can be dissolved, it would not clog the oil strainer. If they are sucked up by the strainer in a clump, oil volume to the oil pump would be ruduced resulting in oil pressure loss.
Oil strainers would not get clogged if they are not subjected to accumulation of sludge. The ckicking noise from your engine is not from the clogged strainer. It is the hydraulic lifters which are not getting sufficient or leaking oil pressure. It cannot be fully be attributed to the oil as some could be due to wear over time.
Those who produce additives would tell you the advantages of their product but would they ever tell you the disadvantages? Do you still remember how the tobacco companies were sued for their product?
In theory their product might be good but in practice, it might be another story.
There are poeple who recommends you to use additives and then comes along someone with a product to clean the engine because of sludge buildup. That is life cycle, everybody is out to make something out of nothing.
Sporadic use of additive is ok but continued use is where the problem lies. A one time use of additive would not result in much accumulation of sludge.
These are all my personal thoughts and I have only my experience and word to back me up so they should not be used as an argument.
The saying goes, " A glass of wine is good for health" If you try too many glasses, it is not a good ida.
Sunday, November 28th, 2010 AT 11:15 AM