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do most folks here use synthetic oil? my only concern is that you need to use a flushing compound.. 700 1990

posted by  someone claiming to be Al on  Thu Oct 7 11:17 CST 2004 [RELATED]

IMO you have two choices both equally good.
Both have been suggested in the other threads.
1. Run a treatment of Auto-Rx which will clean the crud out of the engine safely. Then switch to a Sythetic oil and normal oil changes. Don't use a harsh flush because it might damage the oil seals.
2. Switch to a synthetic out right and plan on doing a filter change at 2000 to 3000 miles and top off. Then run until 5,000 miles and change out the oil and filter. From then on do your normal 5K mile changes. The reason for the 2K to 3K filter change is to make sure it hasn't been over loaded with sludge from engine. Yes there will be sludge even if you do 3000 miles dino oil changes.
When I replaced my oil pan seal there was a lot of sludge coating the pan. I did 3,000 mile oil changes from the day the dealer delivered the car starting after the free 1000 mile break in oil change. The pan gasket was replaced around 250K miles.






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