Engine Performance problem
1991 Dodge Dynasty 6 cyl Front Wheel Drive Automatic 112000 miles
I've just gone over some information on oil and oil filters. From what I've determined from the data is that a Mobile1 oil filter is best for filtration and Havoline followed by Exxon conventional oils are best based on the numbers in the table.
The filter choice sounds correct, but the oils and how they ranked did not, maybe I'm wrong.
Do you have a suggestion for a good conventional oil to use that will clean deposits and sludge that have developed in this engine over the last 18 years? It runs great (now) and it just doesn't seem to me that the previous owner took much stock in maintenance and I would like to try to reverse some of the build-up I suspect may be in there.
Also, do you suggest that I change the oil every 1,000 miles for a few times?
Sorry to have rambled. I look forward to your response!
Hi: Any of the brands you suggested are fine. As far as the oil, all nationally recognized brands have a cleaning agent / detergent in them. Therefore, any of them are good.
As far as changing the oil every 1K the first few times, the oil itself will answer that. If the engine is really dirty inside, the oil will inturn get really dirty quickly. In fact, I've seen some oil look like it was never changed after allowing the engine run for a few minutes. Therefore, keep an eye on that to determine the first few changes. If it looks dirty after some miles, change it until it stops happening. However, always change the filter too.
Back to oil brands, I persoally have always used Valvoline. They offer a conventional oil, a high mileage oil (Max Life), and a synthetic blend (Dura Blend). WIth the mileage on the car, I would suggest Max Life. It's designed for vehicles over 75K. However, since you plan to change the oil quickly the first few times, go with the conventional to save money, and switch to Max Life when you plan to run it the full 3K.