I have replaced the oil and oil filter because oil was black and thick and the oil light is still coming on intermittently still. the engine appears to be running fine. the light does not come on immediately but after approx 8 miles. could this be the oil pressure switch?
Your oil pressure switch is a great place to start. since the oil was really thick you could have a horrible oil sludge problem. about 50-100 miles before your next oil change take a bottle of Transmission Fluid and dump in with your oil. and Drive for the remaning 50-100 miles with the Trany fluid still in the oil. The Transmission Fluid is a great Cleaner for sludge.
hope this helped you
Regular service and replacing oil and filter is neccasary for long engine life. Dirty oil gets sludge like and blocked some of the lubrication channels. The light indicate either too little oil or probable low oil pressure perhaps in your case. Very dangerous, Dirty oil sludge block the oil pump and prohibited oil reaching the top. If the light comes on have it checked out and keep checking oil levels.
I've blown an engine due to a oil pump that was blocked by slugde oil.Rather spend the money on regural service and save a lot of money and hassles with a fualty engine.
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